This set of IC Engines Multiple Choice Questions & Answers (MCQs) focuses on “Total Engine Friction”.
1. The difference between I.P. and B.P. is known as total engine friction loss.
a) True
b) False
View Answer
Explanation: None.
2. 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
View Answer
Explanation: None.
3. The pumping loss is negligible in two-stroke cycle engines.
a) True
b) False
View Answer
Explanation: The pumping loss is negligible in two-stroke cycle engines since the incoming fresh mixture is used for scavenging the exhaust gases and charging the cylinder.
4. 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
View Answer
Explanation: None.
5. 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
View Answer
Explanation: None.
6. 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
View Answer
Explanation: The inlet throttling loss occurs due to the restrictions imposed by air cleaner, carburetor venturi, throttle valve, intake manifold and intake valve.
7. 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
View Answer
Explanation: None.
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
View Answer
Explanation: None.
9. Blowby losses ____________ directly with compression ratio.
a) increases
b) decreases
c) remains same
d) none of the mentioned
View Answer
Explanation: None.
10. When a smaller number of large cylinders are used, the friction and economy improve.
a) True
b) False
View Answer
Explanation: None.
11. The frictional mean effective pressure ____________ as the compression ratio is increased.
a) increases
b) decreases
c) remains same
d) none of the mentioned
View Answer
Explanation: None.
Sanfoundry Global Education & Learning Series – IC Engine.
To practice all areas of IC Engine, here is complete set of 1000+ Multiple Choice Questions and Answers.
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- Practice Mechanical Engineering MCQs
- Check IC Engine Books
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