Dr. A.P.J. Abdul Kalam University MTECH I SEM (THE) I.C. Engine and Alternate Fuels (MTTPE-105) Dec 2020 Question Paper

Dr. A.P.J. Abdul Kalam University

Master of Technology (Thermal Engineering)

First Semester Main Examination, Dec-2020

I.C. Engine and Alternate Fuels (MTTPE-105)

Time: 3:00 Hrs Max Marks 70

Note: (i) Attempt any five questions out of eight.

(ii)Draw suitable diagram and assume suitable data wherever

required.

Q.1 (a) Explain theory of combustion in S.I. engine with suitable diagram. (7)

(b) Discuss various elements of MPFI system and also write its merits and

demerits. (7)

Q.2 (a) Discuss different methods of supercharging used in practice. (7)

(b) What are the source of HC formation in petrol engine? (7)

Q.3 (a) Describe the working of duol fuel engine with neat sketch and discuss (7)

its performance characteristics.

(b) Discuss the performance characteristics of variable compression ratio (7)

engine with conventional IC engine.

Q.4 (a) Describe the working of rotary wankel engine with help of neat sketch. (7)

(b) Explain the effect of A:F ratio and spark advance on emission of NOx. (7)

Q.5 (a) Compare ethanol and methanol as a substitute to gasoline. (7)

(b) Discuss different properties of H2 if used as a substitute fuel for (7)

petrol.

Q.6 (a) Explain multi fuel engine with neat sketch. (7)

(b) How air and sound is polluted by engine? Discuss remedial measures. (7)

Page [1]

Q.7 (a) Why do CI engine have greater potential than SI engine for improvement in

power output and fuel economy as a result of turbo charging? When it is most

appropriate to specify an inter-cooler? (7)

(b) Explain the principle difference between fixed jet and variable jet (7)

carburetor.

Q.8 write down short note on any four. (3.5x4 each)

(i) Hydrogen storage

(ii) Advantage of electronic fuel injection

(iii) Modern trend in IC engine

(iv) Pumping losses

(v) Carburetion

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