# Mechanical Engineering - Theory of machines

Exercise : Theory of machines - Section 1
46.
The frictional torque transmitted in a multi-collared shaft is same as that of a single collared shaft.
Right
Wrong
Explanation:
No answer description is available. Let's discuss.

47.
In order to give the primary balance of the reciprocating parts of a multi-cylinder in-line engines,
the algebraic sum of the primary forces must be equal to zero
the algebraic sum of the couples about any point in the plane of the primary forces must be equal to zero
both (a) and (b)
none of these
Explanation:
No answer description is available. Let's discuss.

48.
The gear train usually employed in clocks is a
simple gear train
reverted gear train
sun and planet gear
differential gear
Explanation:
No answer description is available. Let's discuss.

49.
A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is
1.4 N-s/m
18.52 N-s/m
52.92 N-s/m
529.2 N-s/m