## Theory of Machine In a system subjected to damped forced vibrations, the ratio of maximum displacement to the static deflection is known as

Damping factor
Logarithmic decrement
Critical damping ratio
Magnification factor

## Theory of Machine The unbalanced force due to reciprocating masses

Constant in magnitude and direction both
Varies in magnitude and direction both
Varies in magnitude but constant in direction
Varies in direction but constant in magnitude

## Theory of Machine The centre of gravity of a coupler link in a four bar mechanism will experience

No acceleration
Only linear acceleration
Only angular acceleration
Both linear and angular acceleration

## Theory of Machine The example of completely constrained motion is a

All of these
Motion of a shaft with collars at each end in a circular hole
Motion of a square bar in a square hole
Motion of a piston in the cylinder of a steam engine

Iω²
(1/2). I ω ωP
I ω ωP
(1/2).Iω²

## Theory of Machine Which of the following is a spring controlled governor?

Hartnell governor
All of these
Wilson-Hartnell governor
Hartung governor