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What is the degree of crank rotation during the completion of a four-stroke cycle?

a) 90°
b) 279°
c) 180°
d) 360°

Answer: c
Explanation: In a four-stroke engine, the cycle of operations is completed in four strokes of the piston or two revolutions of crankshaft. Each stroke consists of 180° of crankshaft rotation and hence a four-stroke cycle is completed through 720° of crank rotation.

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