

MCQOPTIONS
Saved Bookmarks
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 | |