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 consists of turning pairs
The Ackerman steering gear is most economical
Both (A) and (B)

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Theory of Machine
Hammer blow

Is the maximum horizontal unbalanced force caused by the mass provided to balance the reciprocating masses.
Varies inversely with the square of the speed
Varies as the square root of the speed
Is the maximum vertical unbalanced force caused by the mass added to balance the reciprocating masses

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Theory of Machine
The Klein's method of construction for reciprocating engine mechanism

Is a simplified form of instantaneous center method
Enables determination of Cariole’s component
Is based on acceleration diagram
Utilizes a quadrilateral similar to the diagram of mechanism for reciprocating engine

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