gujarat technological university, ahmedabad, … · course curriculum course title: auto engines...

Auto Engines Diagnosis and Testing Course Code: 3360201

GTU/ NITTTR Bhopal/14 Gujarat State

GUJARAT TECHNOLOGICAL UNIVERSITY, AHMEDABAD, GUJURAT

COURSE CURRICULUM

COURSE TITLE: AUTO ENGINES DIAGNOSIS AND TESTING

(COURSE CODE: 3360201)

Diploma Programme in which this course is offered Semester in which offered

Automobile Engineering Sixth

1. RATIONALE

The course is designed to help the student in understanding the different troubles

occurring in the Automobile Engines, their probable causes and remedies for better

performance of engine. Various tests are to be performed to help in understanding the

diagnosis of Engines. This course is helpful to develop fault tracing/ trouble shooting

skill and maintenance skill, which is essentially expected from technicians.

2. COMPETENCY

The course content should be taught and implemented with the aim to develop different

types of skills leading to the achievement of the following competency:

Remedy engine troubles based on diagnosis and testing using suitable

instruments and tools.

3. COURSE OUTCOMES (CO’s)

Students will be able to:

i. Identify and diagnose the causes of malfunctioning of an engine.

ii. Rectify engine troubles based on symptoms and causes.

iii. Use the suitable instrument and tools for diagnosis and testing of automotive

engine systems.

iv. Remove engine from automobile, disassemble and rectify faults.

v. Develop an attitude of relying on systematic method of working using standard

trouble shooting procedure rather than taking ad-hoc decisions.

4. TEACHING AND EXAMINATION SCHEME

Teaching Scheme

(In Hours)

Total Credits

(L+T+P)

Examination Scheme

Theory Marks Practical Marks Total

Marks

L T P C ESE PA ESE PA

150 4

0

2

6

70

30

20

30

Legends: L-Lecture; T – Tutorial/Teacher Guided Student Activity; P - Practical;

C – Credit; ESE - End Semester Examination; PA - Progressive Assessment.



5. DETAILED COURSE CONTENTS

Unit Major Learning Outcomes

( In Cognitive Domain) Topics and Sub-topics

Unit – I

Tools and

Techniques for

maintaining

Automobile

Engine

System.

1a. Describe tools &

instruments for automobile

engines maintenance.

1b. Explain step by step

procedure for dismantling

and cleaning of engine.

1.1 Engine Maintenance Tools and

instruments.

- General and Special Tools

- Measuring Tools and Instruments

1.2 Engine removal preparation and

procedure.

1.3 Upper engine Disassembly and

cleaning.

1.4 Lower engine Disassembly and

cleaning.

Unit – II

Inspection,

Testing and

Reconditioning

of Engine

Components.

2a. Explain various tests for

testing the automobile

engines.

2b. Describe Engine troubles

and their causes and

remedies.

2c. Explain Reconditioning/

rectifying and replacement

of different engine

components.

2.1 Different Engine tests like,

compression test, vacuum test, cylinder

leakage test etc.

2.2 Inspection of different engine

components.

2.3 Types of defects (troubles), likely to

occur in different engine components and

their analysis.

2.4 Causes and remedies for different

troubles in engine components.

2.5 Reconditioning methods (Grinding,

Boring, Honing and Lapping) of different

engine components.

2.6 Replacement procedure of different

engine components.

Unit– III

Inspection,

Service and

Repair of Fuel

System

Components

for Petrol &

Diesel Engines.

3a. Explain servicing of

different fuel system

components.

3b. Explain the Service of

the air and fuel filters.

3c.Apply knowledge of fuel

system parts/ assemblies-

Carburetor system, MPFI,

LPG & CNG system to

solve problems.

3d. Explain testing of fuel

injectors and nozzles

3e. Explain calibration and

servicing of fuel pump.

3f. Explain replacement of

fuel filters, bleeding of fuel

feed system etc.

3.1 Inspection, repair and service of fuel

tank, fuel lines and fuel filters.

3.2 Inspection, repair, testing and service

of fuel pump.

3.3 Carburettor cleaning, servicing and

adjustment.

3.4 Servicing of Air cleaners.

3.5 Inspection, repair and service of petrol

injection system (MPFI).

3.6 Inspection, repair and service of

LPG/CNG system

3.7 Testing and adjustment of fuel

injectors and nozzles.

3.8 Calibration and phasing of fuel

injection pump.

3.9 Servicing of the fuel feed pump.

3.10 Procedure of checking and setting of

governors.

3.11 Checking and setting of injection

timing.

3.12 Replacement of the fuel filters/



Unit Major Learning Outcomes

( In Cognitive Domain) Topics and Sub-topics

elements.

3.13 Bleeding of the diesel fuel feed

system.

Unit– IV

Servicing,

Maintenance

and

Overhauling of

Cooling &

Lubricating

System.

4a. Explain engine

overheating causes.

4b. Describe Repair of

cooling system leakage

4c.Explain Service/

Inspection, servicing and

testing of water pump,

thermostat valve, fan belt

etc.

4d.Justify oil change at

prescribed interval.

4e. Explain causes for

deterioration of engine oil,

excess consumption of oil,

etc.

4f. Explain servicing of

various components of

lubricating system.

4.1 Causes of engine overheating.

4.2 Servicing of the radiator and water

jacket.

4.3 Detection and repairs of leakage in the

radiator and cooling system.

4.4 Repairs, maintenance and over hauling

of water pump.

4.5 Testing of thermostat valve.

4.6 Defects in the cooling system

components, their causes and remedies.

4.7 Checking and testing of the lubricating

system.

4.8 Servicing of oil pump and relief valve.

4.9 Deterioration of Engine oil.

4.10 Excessive oil consumption.

4.11 Low and high oil pressure.

4.12 Necessity of oil & filter change and

its interval.

4.13 Servicing and replacement of the oil.

Unit– V

Engine

Trouble

Shooting.

5a. Describe engine

diagnostic equipment &

tools,

5b. Describe various engine

symptoms, troubles and their

causes

5c. Apply knowledge of

engines repairs for solving

troubles. 7d.Explain

decarbonising, major &

minor engine tune-up,

overhauling of engines, etc.

5.1 Diagnostic equipment scans tools.

5.2 Causes for the different troubles and

their remedial measures.

5.3 Procedure of decarburizing of the

engine.

5.4 Procedure of major and minor Tune-

Up.

5.5 Difference between major and minor

overhaul of the engine.

Unit– VI

Engine

Performance

Testing.

6a. Explain various testing

equipment.

6b. Compute performance of

engine using measured

parameters.

6c. Prepare and interpret

Graphical representation to

get relationship of different

parameters pertaining to IC

engine.

6.1 Types of dynamometer, working

principle, merits and limitations.

6.2 Engine power measurements and

related terms.

6.3 Determination of I.H.P., B.H.P., F.H.P.

and torque.

6.4 Computation of various efficiencies,

mean effective pressure, specific fuel

consumption.

6.5 Plotting of the graphs and

interpretation of the data from the graph.

6.6 Morse Test on I.C. Engine.



6. SUGGESTED SPECIFICATION TABLE WITH HOURS & MARKS

(THEORY)

Unit

No.

Unit Title

Teaching

Hours

Distribution of Theory

Marks

(Duration – 56 Hours)

R

Level

U

Level

A

Level

Total

I. Tools and Techniques for

Maintaining Automobile Engine

System 04 02 00 03 05

II. Inspection, Testing and

Reconditioning of Engine

Components. 10 04 04 06 14

III. Inspection, Service and Repair of

Fuel System Components for

Petrol & Diesel Engines.

14

05 05 07

17

IV. Servicing, Maintenance and

Overhauling of Cooling &

Lubricating System. 12 04 04 06 14

V. Engine Trouble Shooting. 08 02 04 04 10

VI. Engine Performance Testing 08 02 04 04 10

Total 56 19 21 30 70

Legends: R = Remembrance; U = Understanding; A = Application and above levels (Revised

Bloom’s taxonomy)

7. SUGGESTED LIST OF EXPERIMENTS

The practical should be properly designed and implemented with an attempt to develop

different types of skills (outcomes in psychomotor and affective domain) so that

students are able to acquire the competencies/programme outcomes. Following is the

list of practical exercises for guidance.

Sr.

No.

Unit

No.

Practical Exercises (Any Seven)

(Outcomes’ in Psychomotor Domain) Hours

(Total

28 hrs)

1 II Demonstration of cylinder boring and honing 04

2 II Demonstration of connecting rod alignment 04

3 II Inspection and reconditioning of crankshaft 04

4 II Demonstration of inspection and re-conditioning of

valves and valve seat 04

5 III Perform calibration and phasing of fuel injection pump 04

6 III Perform service and testing of injectors 04

7 III To perform testing and maintenance of LPG/CNG

system. 04

8 IV To perform Servicing of cooling system 04



9 IV To perform Servicing of lubrication system 04

10 V To perform Engine tune up 04

11 V To perform Diagnosis of engine by scan tools 04

12 VI To perform Testing of I.C. engine 04

13 VI To perform Testing and setting of petrol injection

system 04

14 VI Demonstration of fuel consumption test on automobiles 04

8. SUGGESTED LIST OF PROPOSED STUDENT ACTIVITIES

Following is the list of proposed student activities like: course/topic based seminars,

internet based assignments, teacher guided self learning activities,

course/library/internet/lab based mini-projects, Demonstration, Industrial Visits,

Transparency, Video collection, Chart or Model preparation by students etc. These

could be individual or group-based.

9. INSTRUCTIONAL STRATEGIES

i. Case studies of typical maintenance problems in different makes of automobiles

and problem based learning

ii. Arrange expert lectures of maintenance executives of different automobile

companies

iii. Visit to authorized workshops of two wheeler and four wheelers.

iv. Collection of animation or video clips and presentation using same.

v. Chart or Model preparation by students

10. SUGGESTED LEARNING RESOURCES

(A) List of Books

Sr.No. Author Title of Books Publication

1 R. B. Gupta Automobile Engineering Satya Prakashan, New Delhi

2 W.H.Crouse &

D.L. Anglin

Automotive Mechanics Tata Mc-Graw Hill Publishing

Co. Ltd.-New Delhi

3 Ernest A. Venk ,

Edward Dale

Spicer & Irving

Augustus Frazee

Automotive maintenance

and trouble shooting

American Technical Society

4 James D.

Halderman

Automotive Engines

Theory & Servicing, 5/e

Pearson Education India

5 Paul Dempsey

Troubleshooting and

Repairing Diesel Engines

Mc-Graw Hill Professional

6 Anthony E.

Schwaller

Total Automotive

Technology

Cengage Learning, 2004

7 Tim Gills Automotive Service:

Inspection, Maintenance,

Repair

Cengage Learning, 2011

8 R.C. Mishra, K.

Pathak

Maintenance Engineering

And Management

PHI Learning Pvt. Ltd., 2004



Sr.No. Author Title of Books Publication

9 C.P. Nakra Diesel Engine Mechanics Dhanpat Rai Publication Co. (P)

Ltd.

10 Jain and Astana Automobile Engineering Tata Mc-Graw Hill Publishing

Co. Ltd.-New Delhi

11 N.K.Giri Automotive Technology Khanna Publication Co. (P) Ltd.

(B) List of Major Equipment/ Instrument

i. Tool Box (2 sets atleast for Intake of 60 students.)

ii. Measuring instruments and gages like Vernier caliper, Micrometer, Filler gauge,

Thread gauge etc.

iii. Calibration apparatus for fuel injector.

iv. Calibration apparatus for fuel injection pump

v. Dynamometer

vi. Morse Test Apparatus

vii. Various charts for safety slogan, servicing & overhauling of various systems of

Automobile Engine.

(C)List of Software/Learning Websites

Sr.

No

Name of

Topic

Sample Video URL Address

1 Top 10

Favorite

Tools

<1> http://www.youtube.com/watch?v=ZqJIaXXLAvs

<2> https://www.youtube.com/watch?v=P3ugoKz1dLA&index

=5&list=PLPvqVA0h0J6h_KZG_XWOcYwcTZJU22Vkb

2 Diagnosis

of Engine

Problem

<1> http://www.youtube.com/watch?v=Yz-zh3N6AOo

<2> https://www.youtube.com/watch?v=pLngEdJ2dvI&index=

4&list=PLPvqVA0h0J6h_KZG_XWOcYwcTZJU22Vkb

3 Main Parts

of Car

Engine

<1> http://www.youtube.com/watch?v=xbIY-2XoJxw

<2> https://www.youtube.com/watch?v=ZLOGyUIW0Rs&inde

x=1&list=PLPvqVA0h0J6h_KZG_XWOcYwcTZJU22Vkb

4 Cleaning of

Car Engine

<1> http://www.youtube.com/watch?v=PAR5xFWCTfg

<2> https://www.youtube.com/watch?v=g-

cHvRI7n0k&index=3&list=PLPvqVA0h0J6h_KZG_XWO

cYwcTZJU22Vkb

5 How to

Clean Fuel

Injectors

<1> http://www.youtube.com/watch?v=jeRqmggQVOs

<2> https://www.youtube.com/watch?v=1Eko94ch65Y&index=

2&list=PLPvqVA0h0J6h_KZG_XWOcYwcTZJU22Vkb

http://www.youtube.com/watch?v=ZqJIaXXLAvs

https://www.youtube.com/watch?v=P3ugoKz1dLA&index=5&list=PLPvqVA0h0J6h_KZG_XWOcYwcTZJU22Vkb

https://www.youtube.com/watch?v=P3ugoKz1dLA&index=5&list=PLPvqVA0h0J6h_KZG_XWOcYwcTZJU22Vkb

http://www.youtube.com/watch?v=Yz-zh3N6AOo

https://www.youtube.com/watch?v=pLngEdJ2dvI&index=4&list=PLPvqVA0h0J6h_KZG_XWOcYwcTZJU22Vkb

https://www.youtube.com/watch?v=pLngEdJ2dvI&index=4&list=PLPvqVA0h0J6h_KZG_XWOcYwcTZJU22Vkb

http://www.youtube.com/watch?v=xbIY-2XoJxw

https://www.youtube.com/watch?v=ZLOGyUIW0Rs&index=1&list=PLPvqVA0h0J6h_KZG_XWOcYwcTZJU22Vkb

https://www.youtube.com/watch?v=ZLOGyUIW0Rs&index=1&list=PLPvqVA0h0J6h_KZG_XWOcYwcTZJU22Vkb

http://www.youtube.com/watch?v=PAR5xFWCTfg

https://www.youtube.com/watch?v=g-cHvRI7n0k&index=3&list=PLPvqVA0h0J6h_KZG_XWOcYwcTZJU22Vkb



http://www.youtube.com/watch?v=jeRqmggQVOs

https://www.youtube.com/watch?v=1Eko94ch65Y&index=2&list=PLPvqVA0h0J6h_KZG_XWOcYwcTZJU22Vkb

https://www.youtube.com/watch?v=1Eko94ch65Y&index=2&list=PLPvqVA0h0J6h_KZG_XWOcYwcTZJU22Vkb



OR

Complete Video Play-list available on below single URL address

https://www.youtube.com/playlist?list=PLPvqVA0h0J6hMD30iKtGqjg1QYikZxJGV

11. COURSE CURRICULUM DEVELOPMENT COMMITTEE

Faculty Members from Polytechnics

Mr.D.A.Dave, H.O.D., Auto.Dept. Sir Bhavsinhji Polytechnic Inst., Bhavnagar.

Mrs.M.N.Vibhakar, Lecturer, Automobile Dept. DR.S&SS Gandhi Polytechnic, Surat

Mr. S.V. Trivedi, H.O.D., Auto. Dept., Parul Institute of Technology, Waghodia,

Vadodara.

Mr.A.C.Suthar, Lecturer, Automobile Dept. MLIDS Polytechnic, Bhandu

Coordinator and Faculty Members from NITTTR Bhopal

Prof. K. K. Jain, Professor, Deptt. of Mechanical engineering, NITTTR, Bhopal

Dr. C. K. Chugh, Professor, Deptt. of Mechanical engineering, NITTTR, Bhopal

Dr. A.K. Sarathe, Associate Professor, Deptt. of Mechanical engineering, NITTTR,

Bhopal

https://www.youtube.com/playlist?list=PLPvqVA0h0J6hMD30iKtGqjg1QYikZxJGV

SUBJECT: AUTOMOBILE ENGINE DIAGNOSIS AND TESTING

ASSIGNMENT - 1 TOOLS AND TECHNIQUES FOR MAINTAINING AUTOMOBILE

ENGINE SYSTEM.

1 List various precision instruments used in automobile shop. Write procedure for

measurement by Vernier caliper with neat sketch

2 List out various defects found in cylinder. Explain them in brief

3 List different types of hand and measuring tools used in engine shop.

4 Describe following with reference to I.C.engine.

(1) Specific Fuel Consumption (2) volumetric Efficiency (3) Frictional power

5 Explain the procedure for wear measurement of cylinder bore. List any five precision

measuring instruments used in automobile workshop.

6 Write short note on precision measuring instruments used in automotive workshop.

7 What are Specification. How they are used in workshop.

8 Explain Causes and Remedies for various defects in Valve

9 Write short note on precision measuring instruments used in automotive workshop


ASSIGNMENT – 2 TROUBLES IN FLUID COUPLING, ITS CAUSES AND REMEDIES

1 What are the various valve defects? How they are checked out for an engine.

2 Write short note on crankshaft balancing for an engine

3 What is misalignment of connecting rod? How it can be measured? Write steps to cure it.

4 Name the precision instruments used for measuring Ovality and Taper, Explain the

procedure in brief

5 Explain in brief (1) Cylinder boring (2) Cylinder honing

6 Describe the procedure of Compression Test and vaccum test of engine

7 Give the cause and remedies for premature failure of main bearings

8 Give reasons for rapid wear of piston rings. Explain the procedure for piston ring removal

and fitting.

9 Define tune up. Describe typical tune up procedure

10 Explain the procedure for valve refacing and valve seat cutting


ASSIGNMENT – 3 INSPECTIONS, SERVICE AND REPAIR OF FUEL SYSTEM

COMPONENTS FOR PETROL & DIESEL ENGINES

1 Explain the idling speed adjustment on a solex carburetor

2 Give probable causes and remedies for (i) Nozzle dripping at delivery (ii) Engine hunting

3 Explain procedure to replace fuel filter used in diesel engine.

4 Give causes and remedies for rough idling for diesel engine.

5 Explain method of engine decarburizing

6 Describe the procedure in brief for calibration and phasing of F.I. pump.

7 Expalin in brief various test for diesel injector.

8 Explain the servicing and setting of carburetor.

9 Explain calibration and phasing of inline fuel injection pump on test bench

10 Explain the effect on engine running, if

(1) Governor is not working properly (2) Delivery valve is leaking


ASSIGNMENT – 4 SERVICING, MAINTENANCE AND OVERHAULING OF

COOLING LUBRICATING SYSTEM.

1 Give causes and remedies for (i) flooding of float chamber. (ii) Engine cold starting

problem

2 Give servicing procedure of A/C mechanical fuel pump.

3 Explain the procedure of reverse flushing of water cooling system

4 Write causes and remedies for the failure of engine cooling system.

5 State the function and testing of thermostat valve.

6 State the causes and remedies for Overheating of engine

7 Give at least seven causes for engine overheating

8 Give the causes and remedies for excessive engine oil consumption.


ASSIGNMENT – 5 ENGINE TROUBLE SHOOTING

1 Define tune up. Explain typical tune up procedure.

2 Explain the cause of excessive oil consumption.

3 Give the cause and remedies for engine knocking and engine vibration.

4 Define the terms:

(1) I.H.P (2) B.H.P (3) Specific fuel consumption (4) Mechanical efficiency

5 Explain the causes of engine hunting in a diesel engine.

6 Explain the procedure of changing the engine oil.

7 Explain the method of flushing the radiator and block with sketch.


ASSIGNMENT – 6 ENGINE PERFORMANCE TESTING

1 Write short note on Morse Test

2 Why dynamometer used in engine? Explain any one type with neat sketch.

3 Explain the procedure of testing engine with Morse test

4 Write short note on Rope and Prony brake dynamometer.

5 Give causes and remedies for excessive fuel consumption.

6 Give ill effect of clogged fuel filter on engine performance.

9 Describe following with references to I.C. engine.

1. Specific fuel consumption

2. Mechanical efficiency

3. Volumetric efficiency

4. Indicated mean effective pressure

10 The following data was obtained during a trail on a four stroke diesel engine.

Stroke=36cm, Bore=24cm, Mean effective pressure=4.5bar, Speed=500RPM,

Net load on brake=550N, Diameter of brake drum=2m,

Calculate the Brake Power, Indicated Power and Mechanical Efficiency

Laxmi Institute of Technology, Sarigam Approved by AICTE, New Delhi; Affiliated to Gujarat Technological University, Ahmedabad

Academic Year 2018-19

Centre Code: 691 Examination : MID – I Examination Branch: automobile Semester: 6th Sub Code:3360201 Sub: AEDT Date: 28/01/2019 Time: 10:30 to 11:30 Marks: 20 Note: attempt any four

1 Write five different types of hand tools and explain any two of them 5

2 Write five different types of power tools and explain any two of them 5

3 Write a engine removal procedure 5

4 Write a different type of crack detection method for engine block and explain it 5

5 Write a inspection and repair procedure for fuel pump 5

6 Explain cylinder honing and boring process 5

7 Write a short note on injector servicing and testing 5

8 Write a cleaning and servicing of carburetor 5

9 Write a compression test 5

Laxmi Institute of Technology, Sarigam Approved by AICTE, New Delhi; Affiliated to Gujarat Technological University, Ahmedabad

Academic Year 2018-19

Centre Code: 691 Examination : MID – I Examination Branch: automobile Semester: 6th Sub Code:3360201 Sub: AEDT Date: 28/01/2019 Time: 10:30 to 11:30 Marks: 20 Note: attempt any four

1 કોઈપણ પાાંચ વિવિધ પ્રકારનાાં હાથ ના ઓજાર લખો અને તેમાાંના કોઈપણ ત્રણ સમજાિો

5

2 કોઈપણ પાાંચ વિવિધ પ્રકારનાાં પાિરટલૂ્સ લખો અને તેમાાંના કોઈપણ ત્રણ સમજાિો

5

3 એન્જિન રરમિૂ કરિાની પ્રરિયા લખો

5

4 એન્જિન બ્લોક માટે અલગ અલગ પ્રકારની િેક શોધિાની પદ્ધવત લખો અને સમજાિો

5

5 ફ્યલુ પાંપ માટે વનરીક્ષણ અને સમારકામની પ્રરિયા લખો

5

6 વસલલજડર હોવનિંગ અને બોરરિંગ પ્રરિયા સમજાિો

5

7 ઇજેક્ટર સવિિવસિંગ અને પરીક્ષણ પર ટૂાંકા નોંધ લખો

5

8 કાબ્્ુરેુટરની સફ્ાઈ અને સવિિવસિંગ લખો

5

9

કમ્પ્પ્રેશન ટેસ્ટ િીસે ટકૂનોંધ લખો 5

1/3

Seat No.: ________ Enrolment No.______________

GUJARAT TECHNOLOGICAL UNIVERSITY DIPLOMA ENGINEERING – SEMESTER – VI(NEW) • EXAMINATION – WINTER - 2018

Subject Code: 3360201 Date:27-11- 2018

Subject Name: Auto Engines Diagnosis & Testing

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 programmable & Communication aids are strictly prohibited.

5. Use of only simple calculator is permitted in Mathematics.

6. English version is authentic.

Q.1 Answer any seven out of ten. દશમ ાંથી કોઇપણ સ તન જવ બ આપો. 14

1. Name the precision instruments used for measuring Ovality and Tapper of cylinder.

૧. સિસિન્ડરની ઑવસિટી અને ટેપર માપવા માટે ઉપયોગમાાં િેવાતા ચોકિાઇના

િાધનો ના નામ આપો.

2. Write uses of Filler gauge and Plasti gauge. ૨. સિિર ગજે અને પ્િાસ્ટી ગજેનો ઉપયોગ િખો.

3. List various tests carried out on engine. ૩. એસન્જન પર કરવામાાં આવિેા સવસવધ પરીક્ષણોની િૂસચ આપો.

4. What is Ridge in cylinder? ૪. સિસિન્ડરમાાં સરજ શ ાં છે?

5. Give function of Air cleaner. ૫. એર ક્િીનરન ાં કાયય આપો.

6. Give any four causes of valve breakage. ૬. વાલ્વ ત ટવાના કોઈપણ ચાર કારણો આપો.

7. What is the function of governor? ૭. ગવનયરન ાં કાયય શ ાં છે?

8. Write function of pressure relief valve? ૮. પ્રેશર સરસિિ વાલ્વ કાયય િખો.

9. Give Function of morse test. ૯. મોિય ટેસ્ટન ાં કાયય આપો.

10. Give full name. a) SEF b) IMEP. ૧૦. િાંપૂણય નામ આપો. અ) SEF બ) IMEP.

Q.2 (a) Explain about specifications and shop manual. 03

પ્રશ્ન. ર (અ) સવસશષ્ટતાઓ અને શોપ માગયદસશયકા સવશ ેિમજાવો. ૦૩

OR (a) How piston ring end gap is checked? 03 (અ) કેવી રીત ેસપસ્ટન સરાંગ અાંત ગેપ તપાિવામાાં આવે છે? ૦૩

(b) Explain engine compression test. 03 (બ) એસન્જન કમ્પ્પ્રેશન પરીક્ષણ િમજાવો. ૦૩

OR

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(b) Explain about cylinder leakage test. 03 (બ) સિસિન્ડર સિકેજ ટેસ્ટ સવશ ેિમજાવો. ૦૩

(c) Explain the procedure of valve refacing. 04 (ક) વાલ્વ સરિેસિાંગની પ્રસિયા િમજાવો. ૦૪

OR (c) Explain the method of checking connecting rod alignment 04 (ક) કનેસ્ટાંગ રોડ ગોઠવણી તપાિવાની પદ્ધસત િમજાવો. ૦૪

(d) Explain cylinder boring and honing. 04 (ડ) સિસિન્ડર બોસરાંગ અન ેહોસનાંગ િમજાવો. ૦૪

OR (d) Write about crankshaft reconditioning. 04 (ડ) િેન્કશાફ્ટ સરકોસન્ડશસનાંગ સવશ ેિખો. ૦૪

Q.3 (a) Give different causes and remedies of excessive fuel consumption. 03

પ્રશ્ન. 3 (અ) વધુ પડતા બળતણ વપરાશના વવવવધ કારણો અને ઉપાયો આપો. ૦૩

OR (a) Explain different troubles in A.C. mechanical fuel feed pump. 03 (અ) એ.સી પમ્પ માાંઆવતી જુદી જુદી ખામીઓ સમજાવો. ૦૩

(b) Describe servicing of air cleaner. 03 (બ) એર ક્લીનરની સવવિવસાંગનુાં વણિન કરો. ૦૩

OR (b) Describe different tests of diesel engine injector. 03 (બ) ડીઝલ એવજજન ઇજજકે્ટરના વવવવધ પરીક્ષણોનુાં વણિન કરો. ૦૩

(c) Write short note on calibration and phasing of fuel injection pump. 04

(ક) બળતણ ઇજજકે્શન પાંપના માપાાંકન અને તબક્કાવાર પર ટ ાંકા નોાંધ લખો. ૦૪

OR (c) Describe the procedure of replacing engine oil & oil filter. 04 (ક) એવજજન તેલ અને વિલ્ટરન ેબદલવાની પ્રવિયાનુાં વણિન કરો. ૦૪

(d) Explain different troubles and inspection of L.P.G system. 04 (ડ) એલ.પી.જી. વસસ્ટમની વવવવધ મુશ્કેલીઓ અને વનરીક્ષણની સમજાવો. ૦૪

OR (d) Explain trouble shooting of C.N.G system. 04 (ડ) સી.એન.જી. વસસ્ટમની મુશ્કેલી શ વટાંગની સમજાવો. ૦૪

Q.4 (a) Describe the procedure of radiator cleaning. 03

પ્રશ્ન. ૪ (અ) રવેડયેટરની સિાઈની પ્રવિયાનુાં વણિન કરો. ૦૩

OR (a) Describe the procedure of testing thermostat valve. 03 (અ) થમોસ્ટેટ વાલ્વન ેચકાસવાની પ્રવિયાનુાં વણિન કરો. ૦૩

(b) Give causes for engine oil deterioration. 04 (બ) એવજજન તેલના બગાડ માટેના કારણો આપો. ૦૪

OR (b) Explain the procedure of changing engine oil and oil filter. 04 (બ) એવજજન તેલ અને તેલ વિલ્ટર બદલવા માટેની પ્રવિયા સમજાવો. ૦૪

(c) State causes and remedies for engine overheating. 07 (ક) એવજજન ઉષ્ણતામાન માટે કારણો અને ઉપાયો આપો. ૦૭

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Q.5 (a) Write short note on diagnostic scan tool. 04

પ્રશ્ન. ૫ (અ) ડાયગ્નોવસ્ટક સ્કેન ટ લ પર ટ ાંકા નોાંધ લખો. ૦૪

(b) Explain about major tune up. 04 (બ) મુખ્ય ટ્યુન અપ વવશ ેસમજાવો. ૦૪

(c) Explain brake dynamometer. 03 (ક) બ્રેક ડાયનેમોટર સમજાવે છે. ૦૩

(d) Define B.H.P and I.H.P 03 (ડ) બી.એચ.પી. અને આઇ.એચ.પી. વ્યાખ્યાવયત કરો. ૦૩

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GUJARAT TECHNOLOGICAL UNIVERSITY DIPLOMA ENGINEERING – SEMESTER – 6(NEW) • EXAMINATION – SUMMER 2018

Subject Code: 3360201 Date: 12-May-2018

Subject Name: Auto Engines Diagnosis And Testing

Time: 10:30 AM TO 01:00 PM Total Marks: 70 Instructions:








1. Name any two special purpose tools used in automobile workshop.

૧. ઑટોમોબ ઇલ વકકશોપ મ વપર ત કોઇ પણ બે સ્પેશીયલ પપકઝ ટુલ્સ ન ન મ આપો.

2. Write full form of “OBD”.

૨. “OBD” ન ુફૂલ ફોમક લખો.

3. Define “Decarburization”.

૩. “ડીક રબ્યરુ ઇઝેશન” ની વ્ય ખ્ય આપો.

4. Show “Taper” and “Ovality” of cylinder with line sketch.

૪. રેખ ચિત્ર ની મદદ થી સીલીંડર ન “ટેપર” અને “ઑવ લીટી” બત વો.

5. What is Ring Ridge”?

૫. “રીંગ રીજ” એટલે શ?ુ

6. Give name of any two types of Dynamometer.

૬. કોઇ પણ બે પ્રક રન ડ યનેમોમીટર ન ન મ આપો.

7. What is shaft “journal”?

૭. શ ફ્ટ “જનકલ” એટલે શ?ુ

8. Describe “Mechanical efficiency with reference to I.C. engine.

૮. આઇ. સી. એંજીનન સાંદર્કમ “મીકેનીકલ એફીશીયાંસી” વણકવો.

9. What is “Calibration and phasing” of F.I. Pump?

૯. એફ. આઇ. પમ્પ ન ુ“કેલીબે્રશન અને ફેઝીંગ” એટલે શુાં?

10. Explain “vapour lock”.

૧૦. “વેપર લોક” સમજાવો.

Q.2 (a) Explain procedure of taking measurement with micrometer. 03

પ્રશ્ન. ર (અ) મ ઇક્રોમીટર ની મદદથી મ પ લેવ ની રીત સમજાવો. ૦૩

OR

(a) Explain effect of weak valve spring on engine performance. 03

(અ) નબળી વ લ્વ સ્પ્રીંગ ની એંજીન પફોમંસ પર થતી અસરો સમજાવો. ૦૩

(b) Explain method of cylinder leakage test. 03

(બ) સીલીંડર લીકેજ ટેસ્ટ ની રીત સમજાવો. ૦૩

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OR

(b) Write ill effects of clogged oil filter on engine performance. 03

(બ) રાંધ યેલ ઓઇલ ફફલ્ટર ની એંજીન પફોમંસ પર થતી ખર બ અસરો લખો. ૦૩

(c) Explain causes and remedies for various defects in crankshaft. 04

(ક) ક્રેંકશ ફ્ટ મ ઉદર્વતી જુદી જુદી ખ મીઓ મ ટેન ક રણો અને ઉપ યો સમજાવો.

૦૪

OR

(c) Explain the method of checking connecting rod alignment. 04

(ક) કનેક્ટીંગ રોડ અલ ઇનમેંટ િેક કરવ ની પધ્ધતત સમજાવો. ૦૪

(d) Explain the procedure of changing engine oil. 04

(ડ) એંજીન ઓઇલ બદલવ ની રીત સમજાવો. ૦૪

OR

(d) Explain the procedure of testing multicylinder engine with Morse Test. 04

(ડ) મોસક ટેસ્ટ ની મદદથી મલ્ટીસીલીંડર એંજીન ન ટેસ્ટીંગની પધ્ધતત સમજાવો. ૦૪

Q.3 (a) Explain servicing and setting of carburetor. 03

પ્રશ્ન. 3 (અ) ક રબ્યરેુટર ન સવીસીંગ તથ સેટીંગ તવશે સમજાવો. ૦૩

OR

(a) Draw line diagram of Gasoline fuel Injection system. 03

(અ) ગેસોલીન ફયઅુલ ઇંજેક્શન તસસ્ટમ નો લ ઇન ડ ય ગ્ર મ દોરો. ૦૩

(b) Describe the effect on engine performance, if “Delivery valve is leaking”. 03

(બ) “ડીલીવરી વ લ્વ લીક થતો હોય” તેની એંજીન પફોમંસ પર થતી અસરો વણકવો.

૦૩

OR

(b) Describe the effect on engine performance, if “Governor is not working

properly.

03

(બ) “ગવનકર યોગ્ય રીતે ક યક કરત ુન હોય” તેની એંજીન પફોમંસ પર થતી અસરો વણકવો.

૦૩

(c) Explain about pressure testing of cooling system. 04

(ક) કુલીંગ તસસ્ટમ ન પે્રશર ટેસ્ટીંગ તવશે સમજાવો. ૦૪

OR

(c) State causes and remedies for engine overheating. 04

(ક) એંજીન ઓવરહીટ થવ ન ક રણો અને ઉપ યો જણ વો. ૦૪

(d) State causes of engine oil deterioration. 04

(ડ) એંજીન ઓઇલ ખર બ થવ ન ક રણો જણ વો. ૦૪

OR

(d) State causes and remedies for high oil pressure in engine. 04

(ડ) એંજીન મ ઓઇલ ન ઉંિ દબ ણ મ ટેન ક રણો તથ ઉપ યો જણ વો. ૦૪

Q.4 (a) Explain procedure of piston ring removal. 03

પ્રશ્ન. ૪ (અ) પીસ્ટન રીંગ દૂર કરવ ની રીત સમજાવો. ૦૩

OR

(a) Give possible causes for loss of coolant. 03

(અ) કુલાંટ લોસ થવ ન શક્ય ક રણો આપો. ૦૩

(b) Give reasons for engine knocking and vibrations. 04

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(બ) એંજીન મ નોકીંગ અને વ યબે્રશન થવ ન ક રણો આપો. ૦૪

OR

(b) Explain about “shop manuals and specifications.” 04

(બ) “શોપ મેન્યઅુલ તથ સ્પેસીફીકેશન” તવશે સમજાવો. ૦૪

(c) Explain major tune up process. 07

(ક) મેજર ટયનુ અપ પધ્ધતત સમજાવો. ૦૭

Q.5 (a) List various safety precautions to be observed while working in automobile

shop.

04

પ્રશ્ન. ૫ (અ) ઑટોમોબ ઇલ શોપ મ ક મ કરતી વખતે ધ્ય ન મ લેવ ન સ વિેતી ન પગલ ઓની ય દી આપો.

૦૪

(b) Describe the procedure of compression test. 04

(બ) કોમ્પે્રશન ટેસ્ટ ની પધ્ધતત સમજાવો. ૦૪

(c) Give reasons for premature failure of main bearing. 03

(ક) મેઇન બેરીંગ ન અક ળે તનષ્ફળ જવ ન ક રણો આપો. ૦૩

(d) State advantages of electrical fuel pump over mechanical fuel pump. 03

(ડ) તમકેનીકલ ફયઅુલ પમ્પ ની સ પેકે્ષ ઇલેક્કીકલ ફયઅુલ પમ્પ ન ફ યદ ઓ જણ વો.

૦૩

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GUJARAT TECHNOLOGICAL UNIVERSITY DIPLOMA ENGINEERING – SEMESTER – VI • EXAMINATION – SUMMER 2017

Subject Code: 3360201 Date:02-05-2017

Subject Name: Auto Engines Diagnosis and Testing

Time: 10:30 AM TO 01:00 PM Total Marks: 70 Instructions:








1. What is use of Feeler gauge and Vernier gauge?

૧. ફીલર ગેજ અને વર્નિયર ગેજ નો ઉપયોગ શ ાં છે?

2. Explain Bore and Stroke.

૨. બોર અને સ્ટ્રોક સમજાવો.

3. What is Ridge?

૩. રીજ શ ાં છે ?

4. Explain spray test for injector.

૪. ઇન્જેક્ટર મ ટે સ્ટ્રે ટેસ્ટ્ટ સમજાવો.

5. Give full name of MPFI and CRDi

૫. એમ.પી.એફ.આઈ અને સી.આર.ડી.આઈ ન ાં પ રૂ ન મ લખો.

6. Explain testing of Thermostat valve.

૬. થમોસ્ટ્ટેટ વ લ્વન ાં ટેસ્ટ્ટીંગ સમજાવો.

7. List out any four Diagnostic Equipment scan tools.

૭. કોઇ પણ ચ ર ડ યગ્નોસ્ટ્ટીક ઈકકવ્પમેન્જટ સ્ટ્કેન ટ લ ન ન મ લખો.

8. Define Tune up.

૮. ટય ન અપ ની વ્ય ખ્ય આપો.

9. Define Phasing.

૯. ફેઝીંગ ની વ્ય ખ્ય આપો.

10. Give two causes and remedies of piston seizure.

૧૦. ર્પસ્ટ્ટન ચોંટી જવ ન બે ક રણો અને ઉપ યો લખો.

Q.2 (a) Explain upper engine disassembly and cleaning. 03

પ્રશ્ન. ર (અ) અપર એંજીન ડીસએસેમ્બલી અને ક્લીનીંગ સમજાવો. ૦૩

OR

(a) List out engine maintenance tools and instruments. 03

(અ) એંજીન મેન્જટેનન્જસ ટ લ્સ અને ઇન્જસ્ટ્ુમેન્જટ ન ન મ લખો. ૦૩

(b) Name the precision instruments used for measuring ovality of piston. How it

is measured? 03

(બ) “ર્પસ્ટ્ટન ઓવ લીટી” મ પવ મ ટેન ર્રસીઝન ઇન્જસ્ટ્ુમેન્જટ ન ન મ લખો. તે ૦૩

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કેવી રીતે મપ ય છે? OR

(b) Explain Honing process. 03

(બ) હોનીંગ પધ્ધર્ત સમજાવો. ૦૩

(c) Describe the procedure of compression test and interpret the result. 04

(ક) કોમરશેન ટેસ્ટ્ટ ની પધ્ધર્ત જણ વો અને તેન પકરણ મો ન અથથઘટન કરો. ૦૪

OR

(c) Explain causes and remedies for various defects in valve. 04

(ક) વ લ્વમ ાં ઉદ્દ્ ભ્ વર્ત ખ ર્મઓન ક રણો અને ઉપ યો જણ વો. ૦૪

(d) Explain calibration of fuel injection pump. 04

(ડ) ફય લ ઇન્જેકશન પાંપન “કેલીબે્રશન” સમજાવો. ૦૪

OR

(d) Give servicing procedure of the A/C mechanical fuel pump. 04

(ડ) એ.સી મીકેનીકલ ફય લ પાંપને સર્વિસીંગ કરવ ની રીત સમજાવો. ૦૪

Q.3 (a) Explain the procedure for LPG system (i) Fuel pressure check

(ii) Leakage check 03

પ્રશ્ન. 3 (અ) એલ.પી.જી સીસ્ટ્ટમ મ ટેની પધ્ધર્ત સમજાવો: (૧) ફય લ રેશર ચેક (૨) લીકેજ ચેક

૦૩

OR

(a) Explain the following test of injectors: (i) Pressure test (ii) Leak off test 03

(અ) ફય લ ઇન્જેક્ટર મ ટેન ટેસ્ટ્ટ સમજાવો: (૧) રેશર ટેસ્ટ્ટ (૨) લીક ઓફ ટેસ્ટ્ટ ૦૩

(b) State the causes and remedies for overheating of engine. 03

(બ) “એંજીન ઓવરહીટીંગ” ન ક રણો અને ઉપ યો જણ વો. ૦૩

OR

(b) Explain servicing of oil pump and relief valve. 03

(બ) ઓઈલ પાંપ અને કરલીફ વ લ્વન ાં સર્વિસીંગ સમજાવો. ૦૩

(c) Explain about servicing and setting of carburetor. 04

(ક) ક રબ્ય રેટર ન ાં સર્વિસીંગ અને સેટીંગ ર્વશે સમજાવો. ૦૪

OR

(c) Explain the effect on engine running, if

(i) Governor is not working propererly (ii) Delivery valve is leaking 04

(ક) એંજીનન ચ લવ પર થતી અસરો સમજાવો, જો (૧) ગવથનર બર બર ક મ ન કરત ાં હોય (૨) કડલીવરી વ લ્વ લલકેજ હોય

૦૪

(d) Explain procedure of reverse flushing of water cooling system. 04

(ડ) વોટર ક લીંગ ર્સસ્ટ્ટમ મ ાં “ કરવસથ ફ્લર્શિંગ” કરવ ની રીત સમજાવો. ૦૪

OR

(d) Write probable causes and remedies for excessive oil consumption. 04

(ડ) એંજીન ઓઇલન વધ વપર શ ન ક રણો અને ઉપ યો જણ વો. ૦૪

Q.4 (a) Write down safety points to be observed while working in the engine shop. 03

પ્રશ્ન. ૪ (અ) એંજીન શોપ મ ાં ક મ કરતી વખતે ર ખવી પડતી સ વચેતી ન મ દ્દ્ ઓ લખો. ૦૩

OR

(a) Explain effect of excessive clearance between piston and cylinder. 03

(અ) ર્પસ્ટ્ટન અને ર્સલલિંડર વચ્ચે વધ પડતી ક્લીયરન્જસ ની અસરો જણ વો. ૦૩

3/3

(b) Explain difference between major and minor overhaul of the engine. 04

(બ) એંજીનન “મેજર” અને “મ ઈનર” ઓવરહોલ વચ્ચેનો તફ વત સમજાવો. ૦૪

OR

(b) Explain the causes and remedies for engine fail to start while cranking. 04

(બ) “એંજીન કે્રન્જકીંગ થ ય છે પરાંત ચ લ થત નથી”. તેન ક રણો અને ઉપ યો જણ વો.

૦૪

(c) List out different types of dynamometer. Explain Rope brake dynamometer. 07

(ક) જ દ જ દ રક રન ડ યન મોમીટર ન ન મ લખો. રોપ બ્રેક ડ યન મોમીટર સમજાવો.

૦૭

Q.5 (a) Explain the procedure of testing engine with Morse test. 04

પ્રશ્ન. ૫ (અ) મોસથ ટેસ્ટ્ટ ન મદદ થી એંજીનને ચક સવ ની રણ લી સમજાવો. ૦૪ (b) Define : (i) Compression ratio (ii) Volumetric efficiency 04

(બ) વ્ય ખ્ય આપો: (૧) કોમ્રેશન રેર્શયો (૨) વોલ્ય મેરીક એફીર્શયન્જસી ૦૪

(c) Give causes and remedies for (i) High oil pressure (ii) Low oil pressure 03

(ક) નીચેની ખ મીઓ મ ટે ક રણો અને ઉપ યો આપો: (૧) ઓઈલન ાં ઊંચ દબ ણ (૨) ઓઈલન ાં નીચ દબ ણ

૦૩

(d) Write procedure of removing engine from car. 03

(ડ) એંજીનને ક રમ ાંથી બહ ર ક ઢવ ની રીત લખો. ૦૩

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gujarat technological university, ahmedabad, … · course curriculum course title: auto engines...

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