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In which of the following condition the engine is known as over-square engine?

a) d < L
b) d > L
c) d=0
d) L=0

Answer: b
Explanation: L/d, known as stroke to bore ratio, is an important parameter in classifying the size of the engine. If d < L, it is called under-square engine. If d = L, it is called square engine. If d>L, it is called over-square engine.

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