Theory of Machine
The contact ratio is given by

(Length of the path of approach)/(Circular pitch)
(Length of the arc of approach)/cosφ
(Length of the arc of contact)/(Circular pitch)
(Length of path of recess)/(Circular pitch)

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
In elliptical trammels

One pair turning and three pairs sliding
All four pairs are turning
Three pairs turning and one pair sliding
Two pairs turning and two pairs sliding

ANSWER DOWNLOAD EXAMIANS APP

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

Both (A) and (B)
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

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
A body is said to be under forced vibrations, when

None of these
No external force acts on a body, after giving it an initial displacement
There is a reduction in amplitude after every cycle of vibration
A body vibrates under the influence of external force

ANSWER DOWNLOAD EXAMIANS APP