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[Total No. ofPages 02otal No. of Questions 091

B.Tech. Sem. 3"d)

APPLIED THERMODYNAMICS - I

SUBJECTCODE: ME-209

PaoerID: [A08051lNote : Please ill subjct code 8nd psper ID on OMRI

Time: 03Hours MaximumMarks: 60Instruction to Candidates:

1) Section A is Compulsory.

2) Attempt any Four questions rom Section B3) Attempt any Two questions rom Section C

Section - AQI) (10x2=20)

a) What do you understand ypre-ignition n spark gnition engines?

b) What s critical point?

c) What s the difference etween mountings nd abcessories?

d) List the methods or improving effrciency f Ramkine ycle.

e) Name various ypes of nozzles.

D Define degree freaction.

d List various methods f goveming team urbines

h) Discuss he merits of surface ondenser.

i) What s the use of compressed ir in industry.

, What s the effect ofclearance n working of a reciprocating air compressor.

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Q2,) Discuss he'problem f combustion n compression gnition engines learlybringing out he mportance f delay period.

Q3) Draw alabelled ketch f Lancashire oiler-

Q1) Explainthe hysical oncept f critical pressure atio'

Q5) tVhatis bleeding How does t effect he cycle effrciency'

Q6) Define he term weak (lean) mixture, rich mixture and stochiometric(chemically orrect mixture

Section C(2x10=20)

Q7) Determine he enthalpy, olume, ntemal energy of super heated team tl5

bar pressure nd 220"C. The volume of water may be neglected nd akes

specific heat of super heat equal o Z.2kJkgk.

Q8,) Steam s supplied o a three-stage urbine at 40 bar and 400oc and he exhaust

to the condenser akes place at 50 millibar, with a wetness raction of l2Yo

The work developed n the hree stages: igh stage intermediate tage:low

stage:: I :2. The condition ine may be assumed sstraight ine determine.

(a) Condition at entry o each tage.(b) StageeffrciencY.(c) Reheat actor.(d) Intemal efficiency fturbine.

Qg) The pressure nder he air baffle of a surface ondenser s 5.2 cm of Hg'

Temierature f the mixture eaving he cooler section s 25"C. Assuming

avaiiable oolingwater at 15.5' C and external ooler'might ower the

temperature o 20"c explain the effect of this on the quantity of vapouraccompanying irto the pump section.

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,J-970

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