Theory of Machine
In a four stroke I.C. engine, the turning moment during the compression stroke is

Positive during major portion of the stroke
Negative throughout
Negative during major portion of the stroke
Positive throughout

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Theory of Machine
The Ackerman steering gear mechanism is preferred to the Davis steering gear mechanism, because

Whole of the mechanism in the Ackerman steering gear is on the back of the front wheels
The Ackerman steering gear is most economical
Both (A) and (B)
The Ackerman steering gear consists of turning pairs

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