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What is the range of best operating rating temperature of I.C. engine?

a) 106°F – 120°F
b) 140°F – 200°F
c) 106°F – 200°F
d) 120°F – 140°F

Answer: b
Explanation: For satisfactory performance of the engine, neither overheating nor over-cooling is desirable. Experiments have shown that best operating of I.C. engine lies between 140°F to 200°F depending upon types of engine and load conditions.

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