Explore topic-wise MCQs in Ic Engine.

This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Ic Engine knowledge and support exam preparation. Choose a topic below to get started.

1.

The frictional mean effective pressure ____________ as the compression ratio is increased.

A. increases
B. decreases
C. remains same
D. none of the mentioned
Answer» B. decreases
2.

When a smaller number of large cylinders are used, the friction and economy improve.

A. True
B. False
Answer» B. False
3.

Blowby losses ____________ directly with compression ratio.

A. increases
B. decreases
C. remains same
D. none of the mentioned
Answer» C. remains same
4.

____________ losses are caused due to the leakage of combustion products past the piston from the cylinder into the crankcase.

A. Pumping
B. Blowby
C. Pressure
D. None of the mentioned
Answer» C. Pressure
5.

BLOWBY_LOSSES______________DIRECTLY_WITH_COMPRESSION_RATIO.?$

A. increases
B. decreases
C. remains same
D. none of the mentioned
Answer» C. remains same
6.

The frictional mean effective pressure ____________ as the compression ratio is increased.$

A. increases
B. decreases
C. remains same
D. none of the mentioned
Answer» B. decreases
7.

When_a_smaller_number_of_large_cylinders_are_used,_the_friction_and_economy_improve.$

A. True
B. False
Answer» B. False
8.

____________ losses are caused due to the leakage of combustion products past the piston from the cylinder into the crankcase?

A. Pumping
B. Blowby
C. Pressure
D. None of the mentioned
Answer» C. Pressure
9.

Combustion chamber pump loss is caused due to the pumping work required to pump gases into and out of the pre-combustion chamber.

A. True
B. False
Answer» B. False
10.

The exhaust throttling loss occurs due to the restrictions imposed by air cleaner, carburetor venturi, throttle valve, intake manifold and intake valve.

A. True
B. False
Answer» C.
11.

If due attention is not given to the valve size, valve timing and valve flow coefficients there may be a substantial loss with the increase in engine speed.

A. True
B. False
Answer» B. False
12.

The standard practice for sizing the exhaust valve is to make them a certain percentage ____________ than the inlet valves.

A. larger
B. smaller
C. unpredictable
D. none of the mentioned
Answer» C. unpredictable
13.

The pumping loss is negligible in two-stroke cycle engines.

A. True
B. False
Answer» B. False
14.

In four stroke cycle engines, an ample amount of ____________ is used during intake and exhaust processes.

A. heat
B. pressure
C. power
D. none of the mentioned
Answer» D. none of the mentioned
15.

The difference between I.P. and B.P. is known as total engine friction loss.

A. True
B. False
Answer» B. False