For a critically damping system, the motion will be:

a$)$ periodic

b$)$ aperiodic

c$)$ harmonic

d$)$ None

In steady state forced vibrations, the amplitude of vibrations at resonance is damping coefficient.

a$)$ equal to

b$)$ directly proportional to

c$)$ inversely proportional to

d$)$ independent of

When there is a reduction in amplitude over every cycle of vibration, then the body is said to have

a$)$ free vibration

b$)$ forced vibration

c$)$ damped vibration

d$)$ under damped vibration

In vibration isolation system, if then for all values of damping factor, the transmissibility will be

a$)$ less than unity

b$)$ equal to unity

c$)$ greater than unity

d$)$ zero

While calculating the natural frequency of a spring$-$mass system, the effect of the mass of the spring is accounted for by adding $x$ times its value to the mass, where $x$ is

a$)\frac{1}{2}$

b$)\frac{1}{3}$

c$)\frac{1}{4}$

d$)\frac{3}{4}$

Critical speed for rotating shaft is expressed as

a$)$ rotation of shaft in degrees

b$)$ rotation of shaft in radians

c$)$ rotation of shaft in minutes

d$)$ natural frequency of the shaft

The first critical speed of an automobile running on a sinusoidal road is calculated by $($modeling it as a single degree of freedom system$)$

a$)$ Resonance

b$)$ Approximation

c$)$ Superposition

d$)$ Rayleigh quotient

The natural frequency of a spring$-$mass system on earth is $w_m.$ The natural frequency of this system on the moon