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

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

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
Oldham's coupling is the

Second inversion of double slider crank chain
Third inversion of slider crank chain
Second inversion of single slider crank chain
Third inversion of double slider crank chain

ANSWER DOWNLOAD EXAMIANS APP