gujarat technological universityq.3 (a) define demand forecasting and explain expert opinion method...

Seat No.: _____ Enrolment No.______

GUJARAT TECHNOLOGICAL UNIVERSITY B.E. Sem-V

th Examination December 2010

Subject code: 150001 Subject Name: Management-II

Date: 11 /12 /2010 Time: 03.00 pm - 05.30 pm

Total Marks: 70

Instructions: 1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

Q.1 (a) Define product, production and production management. 07

(b) State the benefits derived from effective production management. 07

Q.2 (a) State the functions of production management department. 07

(b) Explain the different types of production systems. 07

OR

(b) What is break even analysis? State the assumption in break even analysis. 07

Q.3 (a) Define market research. State its objectives. 07

(b) Explain the concept of product life cycle. 07

OR

Q.3 (a) Explain the functions of packaging. 07

(b) Explain the importance of demand forecasting. State the features of a good

demand forecasting method.

07

Q.4 (a) Explain the important functions of financial management. 07

(b) Explain the relationship of finance department with the other departments of a

business.

07

OR

Q.4 (a) Explain the role of various financial regulatory bodies. 07

(b) Explain the role of a finance manager. 07

Q.5 (a) Define manpower resources planning. Explain the importance of manpower

resources planning.

07

(b) Explain the process of manpower planning 07

OR

Q.5 (a) Explain the process of Management by Objectives. 07

(b) Define ‘strategy’. Explain the importance of strategy. 07

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GUJARAT TECHNOLOGICAL UNIVERSITY B. E. Sem. - V - Examination – June- 2011

Subject code: 150001

Subject Name: Management-II Date:17/06/2011 Time: 10:30 am – 01:00 pm Total Marks: 70




Q.1 (a) Differentiate Marketing from Selling and enumerate various marketing concepts

in brief. 07

(b) What is strategy as per Management by Objective (MOB)? Discuss various

levels of strategy. 07

Q.2 (a) Define Finance Management and enumerate objectives of financial management. 07

(b) Write notes on concept of Work Cells and Computer Assigned Layout Planning. 07

OR

(b) Define manpower planning Discuss importance and objectives of manpower

planning. 07

Q.3 (a) What is Management by Objective (MOB)? Discuss essentials of effective

Management by Objective (MOB). 07

(b) Describe factors affecting the plant location planning and explain difference

between Process layout plant and product layout plant. 07

OR

Q.3 (a) Discuss features, merits and demerits of Management by Objective (MOB)

Process. 07

(b) Explain Plant Layout planning procedure. 07

Q.4 (a) List the activities that come under the ambit of Human Resource and enumerate

Human Resource Planning process. 07

(b) Discuss various bases for segmentation of business market. 07 OR

Q.4 (a) Define Human Resource Management and differentiate recruitment from

selection process. 07

(b) Define Marketing and discuss the role of 4P in formulating marketing strategies. 07

Q.5 (a) An ABC Co. Ltd, has given following information for current year.

(a) Fixed Cost= Rs. 12,00,000.

(b) Variable cost = Rs. 50 per unit.

(c) Estimated sales for current year = Rs. 50,00,000.

(d) Sale price per unit = Rs. 200.

Calculate:-

(i) Break Even Point (BEP)

(ii) Contribution and profit, if likely sales turnover in the next year is

expected Rs. 45,00,000.

(iii) Sales turnover if profit target is Rs. 15,00,000.

07

(b) What is demand forecasting? Explain various qualitative forecasting methods. 07

OR

Q.5 (a) XYZ Co. Ltd, producing a bath soap, which selling price is Rs. 18/- per unit has

a fixed cost equal to Rs. 75,000 and variable cost is Rs. 8.0 per unit.

Determine:-

(i) Production to achieve Break Even Point (BEP)

(ii) Production in no of soaps required to earn a profit of Rs. 15,000.

(iii) Profit, if 40,000 unit are produced.

07

(b) Discuss emerging role of Finance Manager in any large size organization. 07 *************

1

Seat No.: _________ Enrolment No._______________

GUJARAT TECHNOLOGICAL UNIVERSITY B.E SEM-V Examination-Nov/Dec.-2011

Subject code: 150001 Date: 19/11/2011

Subject Name: Management-II

Time: 02.30 pm-05.00 pm Total marks: 70 Instructions:

1. Attempt all questions.



Q.1 (a) Explain in detail 4 P’s of marketing mix. 07

(b) Define segmentation and explain consumer base of

segmentations. 07

Q.2 (a) Explain types of production layout with merits and demerits 07

(b) Draw Break Even Analysis diagram and explain all variables

of diagram with assumption of Break Even Analysis. 07

OR

(b) A D.P company wants to calculate

(1) P/V Ratio.

(2) BEP in Rs.

(3) And fixed cost in Rs.

The company had following information

Sale price per unit Rs.50

Variable cost per unit Rs.30

Profit Per unit Rs.5

No. of unit produce and sold 1000 units

07

Q.3 (a) What is recruitment? States sources of recruitment. 07

(b) Explain stage of selection process 07

OR

Q.3 (a) Define demand forecasting and explain expert opinion method

and time series analysis method. 07

(b) Explain concepts of marketing management 07

Q.4 (a) “profit maximization is objective of Financial Management”-

explain it 07

(b) Explain function of finance manager 07

OR

Q.4 (a) Define financial management and explain scope of financial

management. 07

Q.4 (b) What are the sources of finance for any organization? 07

Q.5 (a) What are the factors affecting plant location selection

decision? 07

(b) Explain level of strategy. 07

OR

Q.5 (a) What is strategy? Explain elements of strategic management. 07

(b) What is MBO? Explain process of MBO 07

*************

of 1

Seat No.: ________ Enrolment No.______________

GUJARAT TECHNOLOGICAL UNIVERSITY BE- V

th SEMESTER–EXAMINATION – MAY/JUNE - 2012



Time: 02:30 pm – 05:00 pm Total Marks: 70

Instructions:




Q.1 (a) Discuss about four P’s of marketing. What is the significance of

advertising in marketing? 07

(b) Distinguish between marketing and selling. 07

Q.2 (a) What are the objectives of financial management. 07

(b) Define market segmentation and discuss the bases of market

segmentation for consumer products. 07

OR

(b) Define demand forecasting and discuss the methods of demand

forecasting. 07

Q.3 (a) Analyze the factors affecting plant location. 07

(b) The total sales figure in a company is 50000 units, the sale price is rs.100

per unit and the variable cost is Rs 20 per unit. The fixed cost of

production is Rs.320000. Find out the breakeven point and the sales

revenue. What is the profit earned by the firm?

07

OR

Q.3 (a) Discuss the significance of financial planning. 07

(b) Define process layout and discuss its advantages and disadvantages. 07

Q.4 (a) Discuss the objectives and functions of human resource management 07

(b) What are the objectives of manpower planning? mention the steps

involved in it 07

OR

Q.4 (a) What are the sources of recruitment? Mention their advantages and

disadvantages 07

(b) Discuss the steps involved in selection process. What are the advantages

of interviews? 07

Q.5 (a) What is management by objectives?Discuss its advantages for an

organization. 07

(b) Discuss the essential requirements of strategic planning needed to keep a

business progressive. 07

OR

Q.5 (a) Mention the objectives and steps in corporate planning 07 (b) Discuss the nature and dimensions of corporate planning. 07

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1/1

Seat No.: ________ Enrolment No._________

GUJARAT TECHNOLOGICAL UNIVERSITY BE – SEMESTER V • EXAMINATION – WINTER - 2012

Subject code: 150001 Date: 21-01-2013 Subject Name: Management - II Time: 02:30 pm to 05:00 pm Total Marks: 70 Instructions:

1. Attempt all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks.

Q.1 (a)Definemarketinganddiscusswhatismeantbysocietalmarketing 07

(b)Explain marketing mix. Discuss the importance of price and Promotion in marketing.

07

Q.2 (a)What is market segmentation? Discuss the bases for market Segmentation. 07

(b)What is demand forecasting? Discuss the objectives of Short term and long term forecasting.

07

OR (b)Define demand forecasting.Discuss the various methods Of demand forecasting. 07

Q.3 (a)Identify the type’s financial needs of a business and discuss the goals of financial management.

07

(b)Discuss the traditional and the modern approach to the scope of financial management.

07

ORQ.3 (a)Discuss about the various financial functions to be performed by a finance manager. 07

(b)Discuss how far the role of finance manager has emerged due to the change in economic environment in the world.

07

Q.4 (a)Define production management.Discuss the significance of

Production management in enhancing efficiency . 07

(b) Mention the factors influencing plant layout.Discuss the types of plant layout. 07 OR

Q.4 (a)Define strategy.Discuss in brief about levels of strategy. 07 (b) Defint a plant.What are the factors affecting location? 07

Q.5 (a) Discuss the advantages of strategic management for an organization. What are the challenges of strategic management?

07

(b) What are the important sources of recruitment? Discuss the important methods of recruitment.

07

ORQ.5 (a) Discuss the objectives of human resource planning and mention the steps in HRP. 07

(b) What is meant by managing by objectives?Discuss its features. 07

*************

1

Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY BE - SEMESTER–V • EXAMINATION – SUMMER 2013

Subject Code: 150001 Date: 22-05-2013


Time: 10.30 am - 01.00 pm Total Marks: 70 Instructions:




Q.1 (a) State and explain the functions of Marketing. Differentiate between marketing

and selling concept 07

(b) Why market segmentation is important? 07

Q.2 (a) What is financial management? Explain the functions of financial management. 07

(b) Describe various methods of demand forecasting. 07

OR

(b) Describe the role of financial manager. 07

Q.3 (a) What are the factors affecting the location of plant? Explain them in brief. 07

(b) Write a note on market survey. 07

OR

Q.3 (a) What are the factors that affect plant layout? 07

(b) What are the objectives of financial management? 07

Q.4 (a) How important is human resource management in today’s context? 07

(b) Explain manpower planning process. 07 OR

Q.4 (a) Describe the selection process of a typical IT company. 07

(b) What are the sources of recruitment? Explain them in brief. 07

Q.5 (a) Write a note on any two:

1. Management by objectives.

2. Corporate strategy.

3. Criteria for market segmentation.

4. Strategic planning.

14

*************

1




Subject code: 151902 Subject Name: THEORY OF MACHINES Date: 15 /12 /2010 Time: 03.00 pm - 05.30 pm

Total Marks: 70




Q.1 (a) What is meant by a self locking and a self energized brake? 07

(b) A simple band brake (refer fig-1) is applied to a shaft carrying a flywheel of 250 kg mass and of radius of gyration of 300 mm. The shaft speed is 200r.p.m. The drum diameter is 200 mm and the co efficient of friction is 0.25. Determine the (1) The brake torque when a force of 120 N is applied at the lever end. (2) Number of turns of the flywheel before it comes to rest.

07

Q.2 (a) Prove that a governor is stable if dF/dr > F/r, Where F is controlling force and r is corresponding radius of rotation.

07

(b) A porter governor has equal arms 200mm long pivoted on the axis of rotation. The mass of each ball is 3 kg and the mass on the sleeve is 15kg.The ball path is 120 mm when the governor begins to lift and 160mm at the maximum speed. Determine the range of speed. If the fraction at the sleeve is equivalent to a force of 10 N, find the co efficient of insensitiveness.

07

OR

(b) A torsion dynamometer is fitted to a propeller shaft of a marine engine. It is found that the shaft twists 2◌ْ in a length of 20 meters at 120 r.p.m. If the shaft is hollow with 400mm external diameter and 300 mm internal diameter, find the power of the engine. Take modulus of rigidity for the shaft material as 80GPa.

07

Q.3 (a) Discuss gyroscopic effects on naval ships. 07

(b) The turbine rotor of a ship has a mass of 2.2 tones and rotates at 1800 r.p.m. clockwise when viewed from the left. The radius of gyration of the rotor is 320mm. Determine the gyroscopic couple and its effect when (1) Ship turns right at a radius of 250m. with a speed of 25 km/hr.(2)Ship pitches with the bow rising at an angular velocity of 0.8 rad/sec. (3)Ship rolls at an angular velocity of 0.1 rad/sec.

07

OR

Q.3 (a) Derive an expression for angle of heel of a two wheeler taking turn. 07

(b) A four wheeled trolley car has a total mass of 3000 kg.Each axle with its two wheels and gears has a total moment of inertia of 32kg.m2. Each wheel is of 450mm radius. The centre distance between two wheels on an axle is 1.4m.Each axle is driven by a motor with a speed ratio of 1:3.Each motor along with its gear has a moment of inertia of 16 kg.m2 and rotates in the opposite direction to that of the axle. The centre of mass of the car is 1 m. above the rails. Calculate the limiting speed of the car when it has to travel around a curve of 250m. radius without the wheel leaving the rails.

07

2

Q.4 (a) Draw and explain to the point turning moment diagram of a 4-Stroke single cylinder Engine.

07

(b) The turning moment diagram for a multi cylinder engine has been to drawn to a scale of 1 mm to 500 N-m torque and 1 mm to 6° of crank displacement. The intercepted areas between output torque curve and mean resistance line taken in order from one end in sq. mm are, -30,+410,-280,+320,-330,+250,-360,+280,-260 sq. mm when the engine is running at 800 RPM. The engine has a stroke of 300mm and the fluctuation of speed is not to exceed ± 2% of the mean speed. Determine a suitable diameter and cross section of the Flywheel rim for a limiting value of the safe centrifugal stress of 7 MPa. The material density may be assumed as 7200 Kg/m³. The width of Rim is to be 5 times the thickness.

07

OR

Q.4 (a) Define the flywheel and state its importance. What are the types of flywheels?

07

(b) In I.C .Engine Mechanism the Crank radius is 400mm and Connecting rod is 950 mm long. The diameter of piston is 100mm and net gas pressure acting on the piston is 15 MPa. Find (1) Thrust in connecting road (2) Piston side exhaust (3) Torque acting on Crankshaft (4) Radial force or load on main bearings when crank has made 45° from TDC.

07

Q.5 (a) Draw and explain Klein’s construction for determining the velocity of the piston of a Reciprocating engine.

07

(b) A connecting rod is suspended from the point 25 mm above the small end centre and 650 mm above its C.G. it takes 35 seconds for 20 oscillations. Find dynamically equivalent system of two masses when the mass is located at small end centre. Mass of the connecting rod is 40 Kg.

07

OR

Q.5 (a) Explain two Position Synthesis for Slider Crank Mechanism. 07

(b) Explain Synthesis of a Function generation 07

*************

1




Subject Name: Theory of Machines Date:22/06/2011 Time: 10:30 am – 01:00 pm

Total Marks: 70




Q.1 (a) (i) Explain: Function generation, path generation & motion generation.

(ii) Derive Freudenstein’s Equation.

07

(b) Using relative pole method synthesize a four bar mechanism by taking

θ12 = 500 ϕ12= 30

0, θ13 = 60

0 ϕ13= 40

0.

Draw again your mechanism by taking fixed link length = 60 mm.

07

Q.2 (a) State Chebyshev theorem and find three precession points for the function

f(x) = x1.2

in the interval 0 ≤ x ≤ 6.

Take θi = 600, ∆ θ = 90

0, ϕi=50

0, and ∆ ϕ=100

0.

07

(b) A porter governor has equal arms each 200 mm in length and pivoted on the

axis of rotation. The mass of each ball is 5 kg and the mass of sleeve is 25 kg.

The radius of governor is 100 mm when governor begins to lift. If the

frictional increase of speed is 1%, then determine the governor effort and

power.

07

OR

(b) A Hartnell governor having a central sleeve spring and two right angled bell

crank lever operates between 290 r.p.m. and 310 r.p.m. for a sleeve lift of 15

mm. The sleeve arms and the ball arms are 80 mm and 120 mm respectively.

The levers are pivoted at 120 mm from the governor axis and mass of each

ball is 2.5 kg. The ball arms are parallel to the governor axis at the lowest

equilibrium speed. Determine stiffness of the spring.

07

Q.3 (a) List and explain mechanical brakes and also derive condition of self locking

for simple shoe or block brake.

07

(b) A torsion dynamometer is fitted to a propeller shaft of a marine engine. It is

found that the shaft twists 20 in a length of 20 m at 120 r.p.m. If the shaft is

hollow with O.D. = 400 mm and I. D. =300 mm, and modulus of rigidity of

shaft material is 8x1010

N/mm2.Find the power of the engine.

07

OR

Q.3 (a) Classify ‘governors’ and prove for Watt governor, height of the governor

h = 895/ N 2.where N is speed of rotation of sleeve.

07

(b) Find the angle of inclination with respect to the vertical of a two wheeler

negotiating a turn .Following data is given: combined mass of the vehicle with

its rider 250 kg, moment of inertia of the engine flywheel 0.3 kg.m 2, moment

of inertia of each road wheel 1 kg.m 2,speed of engine flywheel five times that

of road wheels and in the same directions, height of centre of gravity of rider

with vehicle 0.6 m ,two wheeler speed 90 km/h, wheel radius 300 mm ,radius

of turn 50 m.

07

2

Q.4 (a) Explain gyroscopic couple and discuss its effect on an aeroplane taking turns

when viewed from rear.

07

(b) The turbine of rotor of a ship has mass of 3000 kg. & radius of gyration of 0.4

m, and clockwise speed of 2500 r.p.m. when looking from stern. Determine

gyroscopic couple and its effect when

(i) The ship steers to the left on curve of 100 m radius at a speed of 36

km/hr. and

(ii) When the ship is pitching in S.H.M., the bow falling with its

maximum velocity .The period of pitching is 40 Sec. and the total

angular displacement between the bow extreme positions of pitching

is 12 0.

07

OR

Q.4 (a) Explain the term ‘turning moment diagram’, ’Coefficient of fluctuation of

speed and ‘’Coefficient of fluctuation of energy’.

07

(b) A flywheel, which is rotating at a maximum speed of 250 r.p.m. and is

having radius of gyration as 0.5 m , is attached to a punching press. The press

is driven by a constant torque electric motor and punches 750 holes per hour.

Each punching operation requires 14000 N-m of energy and takes 1.8

seconds. If the speed of the flywheel is not to fall below 225 r.p.m. Find:

(i) power of the motor and

(ii) mass of the flywheel

07

Q.5 (a) What is meant by dynamically equivalent system? State and prove conditions

for it.

07

(b) The lengths of crank and the connecting rod of a horizontal reciprocating

engine are 300 mm and 1.5 m respectively. The crank is rotating at 120 r.p.m.

clockwise .The mass of the reciprocating parts of the engine is 290 kg whereas

the mass of the connecting rod is 250 kg. The C.G. of the connecting rod is

475 mm from the crank pin centre and the radius of gyration of the connecting

rod about an axis passing through the C.G. is 625 mm .Find the inertia torque

on the crank shaft analytically, when θ = 400.

07

OR

Q.5 (a) A single cylinder vertical engine has a bore of 150 mm and a stroke of 200

mm. The connecting rod is 350 mm long. The mass of piston is 1.6 kg and

engine speed is 1800 r.p.m. On the expansion stroke with a crank at 30 0

from

the top dead centre, the gas pressure is 750 kN/m 2. Determine the net thrust

on the engine.

07

(b) Solve the problem of Que. 5 (b) above, graphically using Klein’s construction

method.

07

*************

1


GUJARAT TECHNOLOGICAL UNIVERSITY BE SEM-V Examination-Nov/Dec.-2011


Subject Name: Theory of Machines Time: 2.30 pm -5.00 pm

Total marks: 70 Instructions:




4. Illustrate your answer with neat sketches wherever required.

Q.1 (a) Prove the Freudenstein’s equation for slider crank mechanism. 04

(b) Synthesize a function generator to generate a function y = sin x in the region

0 ≤ x ≤ 2

π, using Chebyshev spacing taking three precession points. Assume initial

crank angle, θi = 300, initial rocker angle, φi = 60

0 , ∆θ = 60

0 and ∆φ = 90

0. Take

fixed link length 50 mm. Also draw the mechanism.

10

Q.2 (a) Using Bloch’s method, synthesize and draw a four bar linkage to meet the following

specifications of angular positions. Velocities and accelerations at one of its positions

are

ω2 = 21 rad/sec , ω3 = - 6 rad/sec, ω4 = 12 rad/sec,

α2 = - 280 rad/sec2

,

α3 = 200 rad/sec2 and α4 = 100 rad/sec

2.

07

(b) Define (i) Hunting (ii) Sensitiveness (iii) Sleeve lift and (iv) Isochronisms for

governor. 07

OR

(b) A porter governor has all the four arms of 300 mm each. All the upper arms as well

as the sleeve arms are pivoted on the axis of rotation. The mass of each governor ball

is 1 kg. The mass of the sleeve is 20 kg. Find the speed of rotation, when the balls

rotate at a radius of 150 mm.

07

Q.3 (a) Derive an equation for gyro-couple with usual notations. 05

(b) The turbine rotor of a ship has mass of 2000 kg and rotates at 25 rev./sec clockwise

when viewed from the stern. The radius of gyration of rotor is 0.30 meter. Determine

gyroscopic couple and its effect when

(i) The ship turns right at a radius of 250 m with a speed of 25 kM/hr.

(ii) The ship rolls at an angular velocity of 0.1 rad/sec.

09

OR

Q.3 (a) Explain dynamically equivalent two mass system. 05

(b) A Hartnell governor having a central sleeve spring and two right angles bell crank

levers operates between 290 rpm and 310 rpm for a sleeve lift of 15 mm. The sleeve

arms and the ball arms are 80 mm and 120 mm respectively. The levers are pivoted at

120 mm from the governor axis and the mass of each ball is 2.5 kg. The ball arms are

parallel to the governor axis at the lowest equilibrium speed. Determine: (i) loads on

the spring at the lowest and highest equilibrium speeds and (ii) stiffness of the spring.

09

2

Q.4 (a) Distinguish between brakes and dynamometer. 07

(b) Describe the construction and operation of a rope brake absorption dynamometer. 07

OR [P.T.O.

Q.4 (a) Differentiate between Flywheel and Governor. 04

(b) A simple band brake is operated by a lever of length 500 mm. The brake drum has a

diameter of 500 mm and the brake band embraces 5/8 of the circumference. One end

of the band is attached to the fulcrum of the lever while the other end is attached to a

pin on the lever 100 mm from the fulcrum. If the effort applied to the end of the lever

is 2 kN and the coefficient of friction is 0.25, find the maximum braking torque on

the drum.

10

Q.5 (a) State and explain D’Alembert’s principle. 07

(b) Draw and explain Klien’s construction for determining the velocity and acceleration

of the piston in a slider crank mechanism.

07

OR

Q.5 (a) Define the flywheel and state its importance. What are the functions of a flywheel? 07

(b) In Internal combustion engine the crank radius is 400 mm and connecting rod is 950

mm long. The diameter of piston is 100 mm and net gas pressure acting on the piston

is 15 MPa. Find:

1. Thrust in connecting rod

2. Piston side exhaust

3. Torque acting on the crank shaft

4. Radial load on main bearings when the crank has made 450 from TDC.

07

________________

of 2





Subject Name: Theory of Machines


Instructions:




Q.1 (a) Discuss the effect of the gyroscopic couple on a disc fixed at a certain angle

to a rotating shaft.

07

(b) A car is of total mass 2200 kg has the track width 1.5 m. Each wheel having

an effective diameter 0.66 m and the mass moment of inertia 2.4 kg m2.

The mass moment of inertia of rotating parts of the engine is 1.2 kg m2.The

engine axis is parallel to the rear axle and the crankshaft rotates in the same

sense as the road wheels. The gear ratio of the engine to the rear wheel is 3.

The centre of mass of the car is 0.55 m above the road level. If the car is

rounding a curve of 80 m radius at a speed of 100 km/h, determine the load

distribution on the inner and outer wheels.

07

Q.2 (a) Derive an expression of turning moment on crankshaft of a horizontal

reciprocating engine neglecting the effect of the mass of the connecting rod.

07

(b) A vertical IC engine has a cylinder bore of 150 mm and stroke of 200 mm.

The connecting road is 350 mm long. The mass of the reciprocating parts is

1.6 kg. During the expansion stroke with crank angle 30o from top dead

centre, the gas pressure is 750 kN/m2. Determine the piston effort when

engine runs at 1800 rpm.

07

OR

(b) The connecting rod of a reciprocating engine has a mass of 55 kg, distance

between the bearing centers is 850 mm, diameter of small end bearing is 75

mm, diameter of big end bearing is 100 mm, time of oscillation when the

connecting rod is suspended from the small end is 1.83 s and time of

oscillation when it is suspended from the big end is 1.68 s. Determine:

(i) the radius of gyration of the connecting rod about an axis passing

through the mass centre and perpendicular to the plane of oscillation, (ii)

the moment of inertia of the connecting rod about an axis passing through

its mass centre and (iii) the dynamically equivalent system of the

connecting rod comprising two masses, one at the small end bearing centre.

07

Q.3 (a) What is a function of a governor? How does it differ from that of a

flywheel? Also explain the terms sensitiveness, hunting and stability

relating to governors.

07

(b) A porter governor having each of its four arms of 400 mm. The upper arms

are pivoted on the axis of the sleeve, whereas the lower arms are attached to

the sleeve at a distance of 45 mm from the axis of rotation. Each ball has a

mass of 8 kg and the load on the sleeve is 60 kg. Determine the equilibrium

speeds for two extreme radii of 250 mm and 300 mm of rotation of the

balls.

07

OR

Q.3 (a) What is a brake? Enlist the various types of brakes and explain the working 07

of 2

of any one of them with neat sketch.

(b) A simple band brake is applied on a drum of 560 mm diameter which is

rotating at 240 rpm. The band having an angle of contact on the drum of

270o. One end of the band is fitted to a fixed pin while the other end is

fitted to the lever 140 mm from the fixed pin. The lever is 800 mm long

and is perpendicular to the diameter that bisects the angle of contact. If the

coefficient of friction is 0.3, what will be the necessary pull at the end of

the lever to stop the drum when the power absorbed is 40 kW. Also

calculate the width of the band if its thickness is 3 mm and the maximum

tensile stress is limited to 40 N/mm2.

07

Q.4 (a) What is a dynamometer? How the dynamometer differs from the brake?

Explain with neat sketch, the working of any one of the transmission type

dynamometers.

07

(b) A torsion dynamometer is fitted to a shaft of a turbine. The shaft gets

twisted by 2o in length of 20 m when it rotates at 120 rpm. If the shaft is

hollow with 300 mm internal and 400 mm external diameters, what will be

the power of the turbine? If a hollow shaft is replaced by a solid shaft with

350 mm diameter, what will be the power of the turbine? Take the modulus

of rigidity of the shaft material as 80 GPa.

07

OR

Q.4 (a) What do you understand by type synthesis, number synthesis and

dimensional synthesis? Describe the classification of the synthesis problem

with suitable examples.

07

(b) A function xxy −= 22 is to be generated by a four bar mechanism for the

range 41 ≤≤ x with three accuracy points. Assuming 30o starting position

and 120o final position for input link and 90

o starting position and 180

o

final position for output link, determine the corresponding values of x, y, θ

and φ.

07

Q.5 (a) What is the pole of a coupler link of four bar chain mechanism? Enumerate

its properties. What is a relative pole?

07

(b) Explain three-position synthesis for slider-crank mechanism on the base of

method of inversion.

07

OR

Q.5 (a) What is a flywheel? What is its use? Derive a relationship for the

coefficient of fluctuation of speed in terms of maximum fluctuation of

energy and the kinetic energy of the flywheel at mean speed.

07

(b) The mass of a flywheel is 5000 kg with radius of gyration 2 m and the mean

speed of an engine is 240 rpm. If the fluctuation of energy is 100 kN-m,

find the maximum and minimum speeds of the flywheel.

07

*************

1



Subject code: 150902 Date: 12-01-2013 Subject Name: Theory of Machines Time: 02:30 pm to 05:00 pm Total Marks: 70 Instructions:


Q-1 (a) Describe the function of a Proell governor with the help of a neat sketch.

Establish a relation among various forces acting on the bent link . 7

(b) The arms of a porter governor are each 25 cm long and pivoted on the governor axis. Mass of each ball is 5 kg and mass of the central sleeve is 30 kg. The radius of rotation of the balls is 15 cm when the sleeve begins to rise and reaches a value of 20 cm for maximum speed. Determine the range of the governor.

7

Q-2 (a) Design a four-link mechanism if the motion of the input and the output links are

govrned by a function y = x1.5 and x varies from 1 to 4. Assume θ to vary from 30° to 120° and Ф from 60° to 130° . The length of the fixed link is 30 mm. Use chebychev spacing of accuracy points.

7

(b) Explain Frudennstein’s method of three point synthesis of mechanism. 7 OR (b) Define Synthesis. Explain in bief the classification of syanthesis. 7

Q-3 (a) With the help of a neat sketch explain the working of a block of shoe brake. 7 (b) A simple band brake is applied to a rotating drum od diameter 600 mm. The lap

angle of the band on the drum is 270°. The one end of the lever has the fulcrum pin to which is attached,the one end of the band. Other end of the band ia attached to a pin 120 mm from the fulcrum. The co-efficient of frriction between the band and drum is 0.25. A braking force of 100 N is applied at a distance of 840 mm from the fulcrum. Determine the bake torque for (i) Counter-clockwise rotation of the drum and (ii) clockwise rotation of drum.

7

OR Q-3 (a) Describe the constuction and operation of a prony rope bake absorption

dynamometer. 7

(b) A band and block brake has 14 blocks each of which substends an angle of 14°at the centre. The brake is applied to a drum of 0.8 m diameter. The blocks are 100 mm thick. The drum and flywheel mounted on the same shaft has a mass of 2000 kg and combined radius of gyration of 500 mm. The two ends of the bands are fastened to pins on the opposite sides of brake lever at distances 35 mm and 140 mm from the fulcum. An effort of 250 N is applied at a distance 800 mm from the fulcrum. The co-efficient of friction between the blocks and drum is 0.3 Determine (i) Maximum braking torque (ii) angular retardation of the drum (iii) Time taken by the system to come to stop from the rated speed of 300 rpm,

7

2

Q-4 (a) Explain the principle of gyroscopic action and determine the magnitude and

direction of gyroscopic couple 7

(b) A two wheeler motor vehicle and its rider weight 225 kg and their combined center of gravity is 600 mm above the ground level, when the vehicle is upright. Each road wheel is of 600 mm diameter and has a moment of inertia of 1 kgm2

The rotating parts of the engine have a moment of inertia of 0.175 kgm2. The engine rotates at 5.5 times the speed of the road wheels and in the same sense. Determine the angle of heel necessary, when the vehicle is rounding a curve of 30 m radius at a speed of 55 km/hr.

7

OR Q-4 (a) Explain the effect of the gyroscopic couple on the reaction of the four wheels of

a vehicle negotiating a curve. 7

(b) The turbine rotor of a ship has a mass of 3500 kg. It has a radius of gyration of 0.45 m and a speed of 3000 rpm clockwise when looking from stern. Determine the gyroscopic couple and its effect upon the ship: 1. When the ship is steerinng to left on a curve of 100 m radius at a sped of 36 km/h 2. When the ship is pitching in a simple harmonic motion,the bow falling with its maximum velocity.The period of pitching is 40 seconds and the total angular displacement between the two extreme positions of pitching is 12 degrees.

7

Q-5 (a) The crank and connecting rod lenghts of an engine are 125 mm and 500 mm

respectively. The mass of the connecting rod is 60 kg and its centre of gravity is 275 mm from the crosshead pin cenre, the radius of gyration about centre of gravity being 150 mm. If the engine speed is 600 rpm for a crank position of 45° from the inner dead centre, determine using Klien’s construction.(1) the acceleration of the piston (2) The magnitude ,position and direction of inertia force due to the mass of the connecting rod.

14

OR Q-5 (a) Explain the turning moment diagram for 4 cylinder four stroke cycle internal

combustion engine. 7

(b) Explain in brief the working of flywheel in punching Press. 7

*************

1



Subject Code: 151902 Date: 16-05-2013 Subject Name: Theory of Machines Time: 10.30 am - 01.00 pm Total Marks: 70 Instructions:


Q.1 (a) (i) What is the function of a governor? How does it differ from a flywheel? (ii) Explain the terms relating to governor. Sensitiveness, Hunting and Stability

07

(b) Explain gyroscopic effect in case of naval ships with a diagram. Show the terminologies used to indicate sides, front and back of ship. Explain effect of steering, pitching and rolling, assuming ship moves left and right direction sequentially.

07

Q.2 (a) (i) What is gyroscopic couple? Derive a relation for its magnitude.

(ii) The moment of inertia of an aero plane air screw is 20 kg.m2 and the speed of rotation is 1250 rpm clockwise when viewed from the front. The speed of the flight is 200 km/hr. Calculate the gyroscopic reaction of the air screw on the aero plane when it makes a left hand turn on a path of 150 m radius.

07

(b) A Porter governor has arms of 380 mm long. The upper arms are pivoted at the axis of the sleeve and lower arms are attached to the sleeve at a distance of 40 mm from the axis. Each fly ball has a mass of 5 kg. and weight on sleeve is 45 kg. Find the range of speed of the governor if the extreme radii of rotation of the balls are 250 mm and 300 mm. The force of friction on sleeve of mechanism is 30 N.

07

OR (b) The following data refers to a Hartnell governor.

Length of horizontal arms of bell crank lever = 40 mm and Length of vertical arms of bell crank lever = 80 mm Mass of each flying ball 1.2 kg. , The maximum radius of rotation = 100 mm, The minimum radius of rotation = 70 mm, The distance of fulcrum to axis of rotation = 75 mm, Minimum equilibrium speed = 400 rpm, Maximum equilibrium speed 5 % higher than minimum equilibrium speed. Neglecting obliquity of arms determine: (i) spring stiffness (ii) initial compression

07

Q.3 (a) (i) What is a flywheel? What is its function in reciprocating engine?

(ii) What are turning moment diagrams? What information can be avail from them?

07

(b) Determine the maximum torque for a shoe brake shown in figure 1. The diameter of the brake drum is 400 mm and the angle of contact is 96. The applied force is 3 kN on each arm and the coefficient of friction between the drum and the lining is 0.35.

07

OR Q.3 (a) (i) What is a brake? What is the difference between a brake and a clutch?

(ii) What is meant by a self locking and self energized brake? 07

2

(b) The turning moment diagram for a petrol engine is drawn to a vertical scale of 1

mm = 5 N.m and a horizontal scale of 1 mm = 10. The turning moment repeats itself after every half revolution of engine. The areas above and below the mean torque line are 305, 710, 50, 350, 980 and 275 mm2. The rotating parts amount to a mass of 40 kg at a radius of gyration of 140 mm. Calculate the coefficient of fluctuation of speed if the speed of the engine is 1400 rpm.

07

Q.4 (a) (i) Define these terms: Coefficient of fluctuation of speed and coefficient of

fluctuation of energy. (ii) Derive a relation for the coefficient of fluctuation of speed in terms of maximum fluctuation of energy and the kinetic energy at mean speed.

07

(b) A horizontal gas engine running at 200 rpm has a bore of 200 mm and stroke of 400 mm. The connecting rod is 920 mm long and the reciprocating parts weigh 20 kg. When the crank has turned through an angle of 300 from inner dead center, the gas pressure on the cover and the crank sides are 460 kN/m2 and 70 kN/m2 respectively. Diameter of piston rod is 50mm. Determine

(i) turning moment on the crank shaft, and (ii) thrust on the bearings.

07

OR Q.4 (a) (i) State: D’Alembert’s principle.

(ii) Explain: Dynamically equivalent system. 07

Q.4 (b) The crank and connecting rod of a vertical petrol engine running at 1800 rpm are 60 mm and 260 mm respectively. The diameter of piston is 100 mm and the mass of the reciprocating parts is 1.2 kg. During the expansion stroke when the crank has turned 200 from the top dead center, the gas pressure is 600 kN/m2. Determine (i) net force on the piston, (ii) net load on gudgeon pin, (iii) Thrust on the cylinder walls.

07

Q.5 (a) (i) Explain the terms: Function generation, path generation and motion

generation (ii) What is Chebychev spacing? What is its significance?

07

(b) Design and draw a four bar mechanism to coordinate three positions of input and output links as given below using Relative Pole method. Take L1 = 60 mm (fixed) and L2 = 40 mm (crank). Find the length L3 and L4 graphically. θ 1 =380, θ 2 =900, θ 3 =1420 and φ 1 = 450, φ 2 = 800, φ 3 = 1150.

07

OR Q.5 (a) What is Frudenstein’s equation? How it is helpful in designing a four link

mechanism when three positions of the input (θ1, θ2, θ3) and the output link (φ1, φ2, φ3) are known.

07

(b) Design and draw a four bar mechanism to coordinate three positions of input and output links as given below using Inversion method. Take L1 = 50 mm (fixed) and L2 = 40 mm (crank). Find the length L3 and L4 graphically. θ 1 =380, θ 2 =900, θ 3 =1420 and φ 1 = 450, φ 2 = 800, φ 3 = 1150.

07

Figure 1, Que. 3 (b)

1





Subject Name: Power Plant Engineering Date: 18 /12 /2010 Time: 03.00 pm - 05.30 pm

Total Marks: 70




Q.1 (a) Draw general lay of modern steam power plant label major component and

state function of each component

07

(b) A Power plant has following annul factor:

Load factor = 0.75

Capacity factor = 0.60

Maximum demand is = 60 MW

Estimate (a) The annual Energy production

(b) The reserve capacity over and above the peak

Load and

(c) The hours during which the plant not in

Service

07

Q.2 (a) Explain the constructional difference between Low pressure and High

pressure boiler

07

(b) Explain with neat construction and working of sketch La Mont Boiler 07

OR

(b) Explain with neat sketch construction and working of Benson Boiler 07

Q.3 (a) Explain the traveling grate stoker with help of neat sketch 07

(b) What are the advantages and Disadvantages of Pulverized coal firing 07

OR

Q.3 (a) Explain the working of Electrostatic precipitator with neat sketch 07

(b) Classify various Ash handling system. Explain Pneumatic and steam jet ash

handling system

07

Q.4 (a) Classify Different types of Fan .Explain why are centrifugal backward-

curved blading normally used for Forced Draft. Fan

07

(b) Compute the required motor capacity needed for F.D. Fan under following

condition:

Coal rate : 10 tonnes/h

Col analysis : C78.0 , H 3.0, O 3.0, S 1.0 ,

M 7.0, A 8.0

Excess air : 30 %

Plenum chamber pressure : 180 mm of water gauge

Mechanical Efficiency

of the Fan : 60%

Room temperature : 300 C

07

OR

2

Q.4 (a) Classify different types of cooling tower used in power plant. Explain

Natural draft cooling tower also explain the reason of its hyperbolic shape

07

(b) Exhaust steam having a quality of 0.9 enter a surface condenser at an

absolute pressure of 0.13 bar and comes outs as a water at 450 C. The

circulating water enters at 30 0 C and leaves at 40

0 C. Estimate quantity of

circulating water and condenser efficiency.

07

Q.5 (a) What are fission fragment and fission product? Explain Fission Reaction

with an example

07

(b) Explain with neat sketch Pressurizes water Reactor(PWR) Explain function

of pressurizer in PWR

07

OR

Q.5 (a) Explain with neat sketch arrangement of a Diesel power plant explain in

brief function of each system

07

(b) Explain with neat sketch construction and working of CANDU type reactor 07

*************

of 2




Subject Name: Power Plant Engineering Date:27/06/2011 Time: 10:30 am – 01:00 pm

Total Marks: 70




Q.1 (a) The following observations were made during a test on surface condenser.

Barometer reading = 760 mm of Hg, condenser vacuum =705 mm of Hg,

Mean temperature of condensate = 35°C, Condensate collected= 2000 kg/h,

Quantity of cooling water circulated = 60,000 kg/h, Rise in temperature of

cooling water = 16°C, Hot well temperature =28

°C.

Determine;

( i ) Vacuum efficiency (ii) Condenser efficiency (iii) Quality of steam

entering the condenser and (iv) Mass of air present per m3 of condenser

volume.

Assume inlet temperature of water as 20°C.

07

(b) (i) Explain the principle of working of a electrostatic precipitator with the

help of a neat diagram.

04

(ii) Explain : Priming and Foaming 03

Q.2 (a) Draw a neat line diagram of a Benson boiler. State the main difficulty

experienced in the La Mont boiler and how it is prevented. Explain its

advantages.

07

(b) Draw a neat named general layout of modern thermal power plant. Explain

four main circuits. Name factors to be considered for selection of site for

thermal power station.

07

OR

(b) (i) Convection and radiant super heaters have opposite characteristics of

temperatures v/s load- Explain.

04

(ii)Why super heat temperature needs to be controlled?

Explain attemperation method.

03

Q.3 (a) Derive an expression for chimney height in order to obtain a draught of ‘h’

mm of water column if the boiler used ‘m’ kg of air / kg of fuel. Assume,

surrounding air temperature as ‘T1’ and flue gas temperature as ‘T2’ in

degree absolute.

Also derive an expression for the condition of maximum discharge of

flue gases through a chimney.

07

(b) (i) State requirements of a good fuel injection system. Explain working

with a schematic of a common- Rail system.

05

(ii) Explain necessity of cooling IC engines 02

OR

Q.3 (a) A boiler uses 1000 kg of coal/ h. The temperature of hot gases inside the

chimney is 650 K and the outside air temperature is 300 K. The draught

produced by the chimney of 25 m height is 15 mm of water.

Determine the air supplied per kg of fuel burnt , draught in terms of hot

07

of 2

gases, mass flow rate of hot gases and area of the chimney required if the

co-efficient of velocity is 0.4

(b) State objectives of a lubrication system. Explain working with a schematic

of a dry sump lubrication system. Differentiate between wet sump and dry

sump lubrication system.

07

Q.4 (a) (i) Describe CANDU type rector with the help of a neat sketch. State its

advantages and disadvantages.

04

(ii) State the functions of a moderator and control rods. 03

(b) Define the following terms:

Connected load, Maximum demand, Average demand, Load factor,

Diversity factor, utilization factor, Plant capacity factor.

07

OR

Q.4 (a) (i) Describe PWR power plant with a schematic. Explain the functions of a

pressurriser

04

(ii) Describe BWR power plant with a schematic. 03

(b) An industrial power station has a maximum demand of 70 MW and

installed capacity is a single generator of 50 MW. Excess energy if required

is brought from the state grid. The load curve of the plant is defined as

follows:

Time(Hrs) 0-6 6-8 8-12 12-14 14-18 18-22 22-24

Load (MW) 30 46 60 46 66 70 36 Determine

(i) Load factor of power station

(ii) Load factor of generator station

(iii) Energy purchased from grid/ day

(iv) Plant use factor

07

Q.5 (a) Discuss causes and harmful effects of pollutants on environment. 07

(b) (i) Discuss the principle of operation of overfeed and underfeed stokers

with the help of simple diagrams.

05

(ii) State important advantages of pulverized coal system. 02

OR

Q.5 (a) (i) Define ion exchange process. What are cation and anion resins. Discuss

the principle of ion exchange process and its utility in demineralization of

water with a neat sketch. How resins can be regenerated ?

07

(b) (i) Write short note on: Reverse osmosis and its application on sea water

treatment.

05

(ii) Write short note on: Once through cooling system. 02

*************

1




Subject Name: Power Plant Engineering Time: 2.30 pm -5.00 pm





Q.1 (a) Draw a steam power plant and discuss its advantages. 07

(b) (i) What is the function of stokers? Compare underfeed and

overfeed stokers.

(ii) Enumerate different types of ash handling systems.

Discuss the working of pneumatic ash handling system.

03

04

Q.2 (a) Explain the working of pressurized fluidized bed

combustion boiler with help of neat sketch. 07

(b) (i) Distinguish between superheater, reheater and air

preheater.

(ii) What is subcritical and supercritical boiler?

(iii) Write different methods of controlling temperature of

super heated steam.

03

02

02

OR

(b) What are the reasons of corrosion in a boiler and how it is

control? 07

Q.3 (a) (i) What is pH value of water? What is its important in

boiler feed water?

(ii) Explain sea water treatment plant.

03

04

(b) Draw and explain diesel engine power plant. 07

OR

Q.3 (a) (i) What are the different impurities in feed water and

write their effect on boiler.

(ii) With help of neat sketch explain Zeolite feed water

treatment process.

03

04

(b) Differentiate Between :

(i) Wet sump lubricating system and Dry sump

lubricating system.

(ii) Diesel power plant and steam power plant.

(iii) Water cooling system and air cooling system.

07

Q.4 (a) Explain the followings :

(i) Binding energy

(ii) Mass defect

(iii)Moderators

(iv) Control rod

(v) Isotopes

(vi) Nuclear fission

(vii) Nuclear fusion

07

(b) What are the different pollutant emitted from power plant

and discuss its defects. 07

OR

2

Q.4 (a) With help of neat sketch explain advantages and

disadvantages of boiling water reactor nuclear power

plant.

07

(b) Define the following :

(i) Connected load

(ii) Maximum demand

(iii)Average demand

(iv) Load factor

(v) Diversity factor

(vi) utilization factor

(vii) Plant capacity factor

07

Q.5 (a) A 100 MW thermal power has peak load of 65 MW. The

power station supplies load to four town having their

maximum demand of 20 MW, 15 MW, 10 MW and

30MW. The annual load factor is 65%. Find :

(i) Average load on the plant.

(ii) Energy supplied per year.

(iii) Diversity factor.

(iv) Demand factor.

(v) Plant capacity factor.

07

(b) (i) Why cooling towers used in a thermal power plant?

Discuss the working of a natural cooling tower.

(ii) Why is draught necessary in a boiler? Compare the

natural draught and artificial draught.

04

03

OR

Q.5 (a) (i) Determine height of the chimney to produce a static

draught of 17 mm of water. The temperature in the

chimney is 300oC and surrounding temperature is 28

oC.

The barometer reads 755 mm of Hg. The value of of

characteristic gas constant is 287 J/kgK and that for

gases is 255 J/kgK

(ii) Write disadvantages of steam, diesel and nuclear power

plant.

04

03

(b) A steam turbine of 20,000 kW capacity requires 5 kg of

steam per hour per kW. The quantity of air leakage into the

condenser is 1 kg per 1000 kg of steam used by turbine.

The vacuum in the condenser is 70 cm of Hg when the

barometer reads 76 cm of Hg. The temperature at the

suction of the air pump is 30oC. The surface condenser

used is fitted with a separate condensate pump and air

pump. Find :

a) The capacity of the air pump requires per minute.

b) The mass of water vapor carried by air in kg/hr.

c) The quantity of cooling water required per minute in

tons if the rise in temperature of water is limited to 8oC.

The quantity of steam entering the condenser is 0.9 dry

and there is no under cooling in the condenser.

Properties of steam at 30oC :

Absolute Pressure = 0.04325 bar

Enthalpy of liquid hf = 125.8 kJ/kg

Enthalpy of evaporation hfg = 2438.1 kJ/kg

Specific volume = 32.8 m3/kg

07

*************

of 2





Subject Name: Power Plant Engineering





4. Use of steam tables is permitted

Q.1 (a) Sketch layout of modern thermal power plant and explain different

circuits.

07

(b) Calculate the cost of generation per kWhr for a power station having

following data:

Installed capacity of plant =200MW

Capital cost=Rs400 crores

Rate of interest and depreciation =12%

Annual cost of fuel , salaries and taxation=Rs 5 crores

Load factor=50%

Also estimate the saving in cost per KWhr if annual factor is raised

to 60%.

07

Q.2

(a) (i) Explain how thermal power plant leads to acid rain?

(ii) Define following terms: Diversity factor, Load factor, Demand

factor, Connected load.

03

04

(b) What is meant by overfeed and under feed principle of coal firing?

Which is preferred for high volatile coal and why?

07

OR

(b) With neat sketch explain Pneumatic ash handling system. List its


07

Q.3

(a) With neat sketch explain construction and working of Fluidized bed

combustion boiler and list its advantages and limitations.

07

(b) Derive an expression for maximum discharge through a chimney. 07

OR

Q.3 (a) A 40 m high chimney is discharging flue gases at 350 °C, when the

ambient temperature is 30 °C. The quantity of air supplied is 18Kg/

Kg of fuel burnt. Determine

(i) Draught produced in mm of water

(ii) Equivalent draught in m of hot-gas column

(iii) Efficiency of chimney if minimum temperature of

artifical draught is 150 °C mean specific heat of flue

gases is 1.005K J/Kg K,

(iv) Percentage of heat spent in natural draught system if

Calorific value of fuel supplied is 30600K J/Kg

(v) Temeprature of chimney gases for maximum

discharge in given time and what will be

corresponding draught in mm ofwater produced.

07

(b) Sketch Schmidt-Hartmann boiler and explain its construction and

working.

07

of 2

Q.4

(a) The air leakage into a surface condenser operating with a steam

turbine is estimated 84kg/hr. the vacuum near the inlet of air pump is

70mm of Hg when barometer reads 76mm of Hg. The temperature at

the inlet of vacuum pump is 20 °C Calculate

(i) Minimum capacity of pump in cu-meters per hour

(ii) Dimensions of reciprocating air pump to remove air

if it runs at 200rpm

(iii) L:D=3:2 and volumetric efficiency=80%

(iv) Mass of vapour extracted per minute with air

07

(b) List different impurities found in feed water and their effects on

performance of thermal power plant.

07

OR

Q. 4 (a) Explain following terms pertaining to cooling tower: Drift, Fill,

Approach, Range and Cooling efficiency of cooling tower

07

(b) Write short note on sodium zeolite ion exchange process. 07

Q.5

(a) List application, advantages and disadvantages of diesel power

plants.

07

(b) Write short notes on :

(i)Fast breeder reactor

(ii) Problems in disposal of nuclear waste.

07

OR

Q.5 (a) Sketch layout of diesel power plant and explain any two circuits? 07

(b) Compare the following:

a) Nuclear power plant and thermal power plant

b) Diesel power plant and thermal power plant

07

************

1/2



Subject code: 151904 Date: 16-01-2013 Subject Name: Power Plant Engineering Time: 02:30 pm to 05:00 pm Total Marks: 70 Instructions:

1. Attempt all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. 4. Use of Steam tables is permitted.

Q.1 (a) A diesel power plant consists of two units of 500 K W capacity of each and

one unit of 200 KW capacity. The fuel has a calorific value of 40,000K J/Kg and fuel consumption is 0.25 Kg/K W hr. Determine the quantity of fuel required a month of 30 days and its cost if the fuel cost is Rs 4000 per ton, also find overall efficiency of the plant.

07

(b) How is the total annual cost of electricity estimated? How does the fuel cost relate to the load and cost of power generation?

07

Q.2 (a) The following details refer to a boiler plant consisting of economizer, a

boiler and super heater Mass of water evaporated per hour =5940 Kg, mass of coal burnt per hour =675Kg, L.C.V of coal =31600K J/Kg, pressure of steam at boiler stop valve =14 bar, temperature of feed water entering the economizer =32 °C, temperature of feed water leaving economizer =115 °C, dryness fraction of steam leaving the boiler and entering super heater is 0.96 temperature of steam leaving the super heater=260°C specific heat of super heater steam =2.3K J / Kg K.. Determine :

i. Percentage of heat in coal utilized in economizer, boiler and super heater

ii. Overall efficiency of boiler plant.

07

(b) With neat sketch explain different types of super heaters. 07 OR (b) Discuss status of Fluidized bed combustion boilers worldwide and list its

advantages and disadvantages. 07

Q.3 (a) List requirements of good coal handling plant and list various stages of coal

handling. 07

(b) Write brief note on Electrostatic precipitator. 07 OR

Q.3 (a) Explain principle of overfeed stoker with neat sketch. Compare under feed stoker and overfeed stroker.

07

(b) Discuss requirements of oil burners? With neat sketch explain long flame, turbulent burners and tangential burners.

07

Q.4 (a) With neat sketch explain engine lubrication system of a typical diesel power

plant. 07

(b) Describe working of hot sodium zeolite process with neat sketch and chemical reactions. List advantages and disadvantages over ion exchange system.

07

2/2

OR Q.4 (a) With neat sketch explain engine cooling system of diesel power plant 07

(b) The following reading were taken during a test on a surface condenser Mean condenser temperature =35 °C , Hot well temperature=30 °C, condenser vacuum=69cm Hg , barometer reading 76cm Hg, condensate collected 16Kg/min. Cooling water enters at 20 °C and leaves at 32.5 °C, flow rate being 37500 Kg/hr calculate

i. Mass of air present per cubic meter of condensate ii. Quality of steam at condenser inlet

iii. Vacuum efficiency iv. Condenser efficiency

07

Q.5 (a) Draw neat sketches of following:

• Gas cooled reactor • CANDU reactor

07

(b) With usual notations derive an expression of estimation of height of chimney and condition of maximum discharge.

07

OR Q.5 (a) State effects of different pollutants emitted from different types of power

plants. 07

(b) Compare the following i. Nuclear power plant and thermal power plant

ii. Diesel power plant and thermal power plant

07

*************

1/2



Subject Code: 151904 Date: 20-05-2013 Subject Name: Power Plant Engineering Time: 10.30 am - 01.00 pm Total Marks: 70 Instructions:


Q.1 (a) Draw a neat named general layout of modern thermal power plant. State the function of feed water heaters, economizer, deaerator, steam turbine and electric generator.

07

(b) Dry steam is condensed at a rate of 7000 kg/h and the air leakage amounts to 14 kg/h.The air pump suction is screened off. The exhaust steam temperature is 32°C.The condensate temperature is 30°C and the temperature at the air pump suction is 25°C.Determine (i) the volume of air handled by the pump, (ii) the mass of steam condensed in the air cooler section per hour, and (iii) the mass of water vapour carried away by air.

07

Q.2 (a) Explain Loeffler boiler with a schematic. State the difficulty experienced in

La-Mont and Benson boiler. How is it solved? Mention its advantages. 07

(b) (i)Name different methods of controlling the superheat temperature of steam. Explain the operation of spray type attemperator. (ii)Explain diversity factor and its importance.

04 03

OR (b) A 12 MW capacity power plant has the input-output curve defined by the

equation, I=5×106(10+8L+0.4L2) kJ/h Where L is in MW. Find: (i) Load at which the plant has its maximum efficiency and its value (ii) Increase in input required to increase the output from 4MW to 6MW by using the input-output equation and also by incremental rate curve.

07

Q.3 (a) Explain Ball and Race mill with a schematic. State its merits and demerits. 07

(b) Explain cyclone burner with a schematic. State its merits and demerits. 07 OR

Q.3 (a) What do you understand by nuclear fission? Give the functions and materials used for following components of nuclear reactor: Moderator, reflector, control rod, coolant, thermal shield.

07

(b) Explain with neat sketch construction and working of CANDU type reactor. 07

Q.4 (a) State the functions of engine cooling system. Explain with a neat schematic the working of a thermostat cooling system.

07

(b) State the functions of lubrication system in diesel power plant. Explain with neat sketch full pressure lubrication system for diesel power plant.

07

OR Q.4 (a) Discuss bad effects of acid rains. How acid rains are controlled? 07

(b) Write requirements of a good ash handling system. Explain with a schematic pneumatic ash handling system.

07

2/2

Q.5 (a) Discuss the merits and demerits of mechanical draught over natural draught

system. 07

(b) Explain seawater treatment using reverse osmosis process. 07 OR

Q.5 (a) Discuss about different impurities found in feed water. 07 (b) Forced draught fan discharges 1500 m3 of air per minute through the outlet of

1.7 m diameter and maintains a static pressure of 110 mm .of water. The temperature of air is 25°C. The density of air at NTP is 1.293 kg/ m3.Calculate power of motor to drive the FD fan if efficiency of fan is 70%.

07

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1





Subject Name: Power Plant Engineering Date: 18 /12 /2010 Time: 03.00 pm - 05.30 pm

Total Marks: 70




Q.1 (a) Draw general lay of modern steam power plant label major component and

state function of each component

07

(b) A Power plant has following annul factor:

Load factor = 0.75

Capacity factor = 0.60

Maximum demand is = 60 MW

Estimate (a) The annual Energy production

(b) The reserve capacity over and above the peak

Load and

(c) The hours during which the plant not in

Service

07

Q.2 (a) Explain the constructional difference between Low pressure and High

pressure boiler

07

(b) Explain with neat construction and working of sketch La Mont Boiler 07

OR

(b) Explain with neat sketch construction and working of Benson Boiler 07

Q.3 (a) Explain the traveling grate stoker with help of neat sketch 07

(b) What are the advantages and Disadvantages of Pulverized coal firing 07

OR

Q.3 (a) Explain the working of Electrostatic precipitator with neat sketch 07

(b) Classify various Ash handling system. Explain Pneumatic and steam jet ash

handling system

07

Q.4 (a) Classify Different types of Fan .Explain why are centrifugal backward-

curved blading normally used for Forced Draft. Fan

07

(b) Compute the required motor capacity needed for F.D. Fan under following

condition:

Coal rate : 10 tonnes/h

Col analysis : C78.0 , H 3.0, O 3.0, S 1.0 ,

M 7.0, A 8.0

Excess air : 30 %

Plenum chamber pressure : 180 mm of water gauge

Mechanical Efficiency

of the Fan : 60%

Room temperature : 300 C

07

OR

2

Q.4 (a) Classify different types of cooling tower used in power plant. Explain

Natural draft cooling tower also explain the reason of its hyperbolic shape

07

(b) Exhaust steam having a quality of 0.9 enter a surface condenser at an

absolute pressure of 0.13 bar and comes outs as a water at 450 C. The

circulating water enters at 30 0 C and leaves at 40

0 C. Estimate quantity of

circulating water and condenser efficiency.

07

Q.5 (a) What are fission fragment and fission product? Explain Fission Reaction

with an example

07

(b) Explain with neat sketch Pressurizes water Reactor(PWR) Explain function

of pressurizer in PWR

07

OR

Q.5 (a) Explain with neat sketch arrangement of a Diesel power plant explain in

brief function of each system

07

(b) Explain with neat sketch construction and working of CANDU type reactor 07

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Subject Name: Power Plant Engineering Date:27/06/2011 Time: 10:30 am – 01:00 pm

Total Marks: 70




Q.1 (a) The following observations were made during a test on surface condenser.

Barometer reading = 760 mm of Hg, condenser vacuum =705 mm of Hg,

Mean temperature of condensate = 35°C, Condensate collected= 2000 kg/h,

Quantity of cooling water circulated = 60,000 kg/h, Rise in temperature of

cooling water = 16°C, Hot well temperature =28

°C.

Determine;

( i ) Vacuum efficiency (ii) Condenser efficiency (iii) Quality of steam

entering the condenser and (iv) Mass of air present per m3 of condenser

volume.

Assume inlet temperature of water as 20°C.

07

(b) (i) Explain the principle of working of a electrostatic precipitator with the

help of a neat diagram.

04

(ii) Explain : Priming and Foaming 03

Q.2 (a) Draw a neat line diagram of a Benson boiler. State the main difficulty

experienced in the La Mont boiler and how it is prevented. Explain its

advantages.

07

(b) Draw a neat named general layout of modern thermal power plant. Explain

four main circuits. Name factors to be considered for selection of site for

thermal power station.

07

OR

(b) (i) Convection and radiant super heaters have opposite characteristics of

temperatures v/s load- Explain.

04

(ii)Why super heat temperature needs to be controlled?

Explain attemperation method.

03

Q.3 (a) Derive an expression for chimney height in order to obtain a draught of ‘h’

mm of water column if the boiler used ‘m’ kg of air / kg of fuel. Assume,

surrounding air temperature as ‘T1’ and flue gas temperature as ‘T2’ in

degree absolute.

Also derive an expression for the condition of maximum discharge of

flue gases through a chimney.

07

(b) (i) State requirements of a good fuel injection system. Explain working

with a schematic of a common- Rail system.

05

(ii) Explain necessity of cooling IC engines 02

OR

Q.3 (a) A boiler uses 1000 kg of coal/ h. The temperature of hot gases inside the

chimney is 650 K and the outside air temperature is 300 K. The draught

produced by the chimney of 25 m height is 15 mm of water.

Determine the air supplied per kg of fuel burnt , draught in terms of hot

07

of 2

gases, mass flow rate of hot gases and area of the chimney required if the

co-efficient of velocity is 0.4

(b) State objectives of a lubrication system. Explain working with a schematic

of a dry sump lubrication system. Differentiate between wet sump and dry

sump lubrication system.

07

Q.4 (a) (i) Describe CANDU type rector with the help of a neat sketch. State its


04

(ii) State the functions of a moderator and control rods. 03

(b) Define the following terms:

Connected load, Maximum demand, Average demand, Load factor,

Diversity factor, utilization factor, Plant capacity factor.

07

OR

Q.4 (a) (i) Describe PWR power plant with a schematic. Explain the functions of a

pressurriser

04

(ii) Describe BWR power plant with a schematic. 03

(b) An industrial power station has a maximum demand of 70 MW and

installed capacity is a single generator of 50 MW. Excess energy if required

is brought from the state grid. The load curve of the plant is defined as

follows:

Time(Hrs) 0-6 6-8 8-12 12-14 14-18 18-22 22-24

Load (MW) 30 46 60 46 66 70 36 Determine

(i) Load factor of power station

(ii) Load factor of generator station

(iii) Energy purchased from grid/ day

(iv) Plant use factor

07

Q.5 (a) Discuss causes and harmful effects of pollutants on environment. 07

(b) (i) Discuss the principle of operation of overfeed and underfeed stokers

with the help of simple diagrams.

05

(ii) State important advantages of pulverized coal system. 02

OR

Q.5 (a) (i) Define ion exchange process. What are cation and anion resins. Discuss

the principle of ion exchange process and its utility in demineralization of

water with a neat sketch. How resins can be regenerated ?

07

(b) (i) Write short note on: Reverse osmosis and its application on sea water

treatment.

05

(ii) Write short note on: Once through cooling system. 02

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