# IC Engine Questions and Answers – Air Cooled Systems

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This set of IC Engines Multiple Choice Questions & Answers (MCQs) focuses on “Air Cooled Systems”.

1. Air cooling system is used in small engines whose application gives extreme importance to weight such as aircraft engines.
a) True
b) False

Explanation: Yes, air cooling system is used in small engines whose application gives extreme importance to weight such as aircraft engines while air cooling system is used in industrial and agricultural engines where there can be a strong objection to use of water as a coolant.

2. Air cooling system is used in industrial and agricultural engines where there can be a strong objection to use of water as a coolant.
a) True
b) False

Explanation: Air cooling system is used in industrial and agricultural engines where there can be a strong objection to use of water as coolant while air cooling system is used in small engines whose application gives extreme importance to weight such as aircraft engines.

3. The volumetric efficiency of an air-cooled engine is higher due to high cylinder head temperatures.
a) True
b) False

Explanation: Actually, the volumetric efficiency of an air-cooled engine is lower due to high cylinder head temperatures.
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4. The design of the engines in air-cooled system becomes simpler, as no water jackets are required.
a) True
b) False

Explanation: None.

5. There is a danger of coolant leakage in air-cooled systems.
a) True
b) False

Explanation: Actually, there is no danger of coolant leakage in air-cooled systems.
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6. The weight per B.P. of air-cooled engine is ___________ than that of water-cooled engine.
a) greater
b) less
c) unpredictable
d) none of the mentioned

Explanation: In comparison with water-cooled engine, the weight per B.P. of air-cooled engine is less.

7. The control of cooling system in air-cooled system is not easier than in water-cooled system.
a) True
b) False

Explanation: Actually, the control of cooling system in air-cooled system is much easier than in water-cooled system.

8. A broken fin affects much in air-cooled engine while a hole in the radiator may stop a water-cooled engine.
a) True
b) False

Explanation: In fact, a broken fin does not affect much in air-cooled engine while a hole in the radiator may stop a water-cooled engine.

9. In air-cooled engine, high mean cylinder temperatures mean reduced carbon deposits on the combustion chamber wall.
a) True
b) False

Explanation: None.

10. The warm-up performance of air-cooled engine is not better.
a) True
b) False

Explanation: In fact, the warm-up performance of air-cooled engine is better.

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