Internal Combustion MCQ Question with Answer

Internal Combustion MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

Question No : 36
Compression loss in I.C engines occurs due to

Leaking piston rings

Use of thick head gasket

Clogged air inlet slots

All of the above

Question No : 37
For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of

9 : 1

12 : 1

15 : 1

18 : 1

Question No : 38
A diesel engine as compared to petrol engine (both running and rated load) is

More efficient

Less efficient

Equally efficient

Other factors will decide it

Question No : 39
Morse test can be conducted for

Petrol engines

Diesel engines

Multi cylinder engines

All of these

Question No : 40
The mechanical efficiency (ηm) of the engine is given by

η_m = B.P/I.P

η_m = I.P/B.P

η_m = (B.P × I.P)/100

None of these

Question No : 41
Polymerisation is a chemical process in which molecules of a compound become

Larger

Slowed down

Smaller

Liquid

Question No : 42
The thermal efficiency of diesel engines on weak mixtures is

Unaffected

Lower

Higher

Dependent on other factors