Theory of Machine
There are six gears A, B, C, D, E and F in a compound train. The numbers of teeth in the gears are 20, 60, 30, 80, 25 and 75 respectively. The ratio of angular speeds of the driven (F) to the driver (A) of the drive is

1/8
1/24
12
4/15

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
Angle of ascent of cam is defined as the angle

Moved by the cam from the instant the follower begins to rise, till it reaches its highest position
Through which the cam rotates during the period in which the follower remains in highest position
During which the follower returns to its initial position
Of rotation of the cam for a definite displacement of the follower

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
The static balancing is satisfactory for low speed rotors but with increasing speeds, dynamic balancing becomes necessary. This is because, the

Unbalanced couples are caused only at higher speeds
Effects of unbalances are directly proportional to the speed
Effects of unbalances are proportional to the square of the speed
Unbalanced forces are not dangerous at higher speeds

ANSWER DOWNLOAD EXAMIANS APP