ENGINEERING MECHANICS QUIZ

In order to completely specify angular displacement by a vector, it must fix

Sense of angular displacement

Direction of the axis of rotation

Magnitude of angular displacement

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The potential energy of a vertically raised body is __________ the kinetic energy of a vertically falling body.

Greater than

None of these

Less than

Equal to

TRUE ANSWER : ?
YOUR ANSWER : ?

A screw jack used for lifting the loads is

None of these

An ideal machine

A non-reversible machine

A reversible machine

TRUE ANSWER : ?
YOUR ANSWER : ?

In order to determine the effects of a force, acting on a body, we must know

All of these

Magnitude of the force

Line of action of the force

Nature of the force i.e. whether the force is push or pull

TRUE ANSWER : ?
YOUR ANSWER : ?

The linear acceleration (a) of a body rotating along a circular path of radius (r) with an angular acceleration of α rad/s2, is

a = r / α

a = α.r

a = α/ r

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The bodies which rebound after impact are called

Inelastic bodies

None of these

Elastic bodies

Neither elastic nor inelastic bodies

TRUE ANSWER : ?
YOUR ANSWER : ?

The maximum efficiency of a screw jack is

(1 - sinφ)/(1 + sinφ)

(1 + tanφ)/(1 - tanφ)

(1 - tanφ)/(1 + tanφ)

(1 + sinφ)/(1 - sinφ)

TRUE ANSWER : ?
YOUR ANSWER : ?

When a person, on a bicycle, drives round a curve, he has to lean __________ to maintain equilibrium.

Inward

Towards back

Towards front

Outward

TRUE ANSWER : ?
YOUR ANSWER : ?

The acceleration of a particle moving with simple harmonic motion, at any instant is given by

ω.y

ω2.y

ω2/y

ω3.y

TRUE ANSWER : ?
YOUR ANSWER : ?

When two elastic bodies collide with each other,

The two bodies begin to regain their original shape

The two bodies will momentarily come to rest after collision

All of these

The two bodies tend to compress and deform at the surface of contact

TRUE ANSWER : ?
YOUR ANSWER : ?