Internal Combustion Engines, Question Paper of B.Tech 4th Semester,Download Previous Years Question Paper 1

Roll No. ......................

Total No. of Questions : 09]

B.Tech. (Sem. – 4th)

INTERNAL COMBUSTION ENGINES

SUBJECT CODE : AE - 202

Paper ID : [A0708]

Time : 03 Hours

Instruction to Candidates:

1) Section - A is Compulsory.

2) Attempt any Four questions from Section - B.

3) Attempt any Two questions from Section - C.

Section - A

Q1)

 a) State the function of a carburettor in petrol engine.

 b) What is relative efficiency?

 c) What is the function of intake manifold?

 d) Define combustion? State the general conditions necessary for combustion.

 e) State the applications of C.I. Engines.

 f) What do you mean by term ‘carburetion’?

 g) What is petrol injection?

 h) State the importance of engine friction.

 i) State the demerits of overcooling and undercooling.

 j) What is supercharging?

Section - B

Q2) Explain with suitable sketches the working of a four stroke otto engine.

Q3) A carnot engine working between 400° C n and 40° C produces 130 kj of

work. Determine :

(a) The engine thermal efficiency

 (b) The heat added

 (c) The entropy changes during the heat rejection process

Q4) Give the comparison of Actual naturally aspirated and supercharged engine’ pressure – volume diagram.

Q5) How engines are air cooled? What is the purpose of fins in an air cooled syytem? What is the size and spacing of fins

Q6) Describe how the I.P. of a multicylinder engine is measured?

Section - C

Q7) (a) Describe the difference between theoretical and actual valve timing diagrams of a diesel engine.

(b) Explain the phenomenon of knocking in S.l. Engines. What are different

      factors which influence the knocking? Describe the methods used to

      suppress it.

Q8) Describe with suitable sketches the following systems of a modern carburettor:

 (a) Main Metering System.

 (b) Idling System.

 (c) Economiser System.

 (d) Acceleration pump system.

Q9) Enumerate the lubrication system and explain wet sump lubrication system

with the help of neat sketch