MECHANICAL OPERATIONS QUIZ

The forces which do not meet at one point and their lines of action do not lie on the same plane are known as

Non-coplanar concurrent forces

Coplanar concurrent forces

Coplanar non-concurrent forces

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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

None of these

Equal to

Greater than

Less than

TRUE ANSWER : ?
YOUR ANSWER : ?

The velocity of a body on reaching the ground from a height h, is

√(2gh)

2.√(gh)

2g.√h

√(gh)

TRUE ANSWER : ?
YOUR ANSWER : ?

An ideal machine is one whose efficiency is

1

Between 70 and 80%

Between 80 and 90%

Between 60 and 70 %

TRUE ANSWER : ?
YOUR ANSWER : ?

When two elastic bodies collide with each other,

The two bodies will momentarily come to rest after collision

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

The two bodies begin to regain their original shape

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The equivalent length of a simple pendulum which gives the same frequency as compound pendulum is

(kG² + h²)/h²

h/(kG² + h²)

h²/(kG² + h²)

(kG² + h²)/h

TRUE ANSWER : ?
YOUR ANSWER : ?

The velocity ratio of a simple wheel and axle with D and d as the diameters of effort wheel and load axle, is

D + d

D × d

D - d

D / d

TRUE ANSWER : ?
YOUR ANSWER : ?

When a body falls freely under gravitational force, it possesses __________ weight.

Minimum

Maximum

None of these

No

TRUE ANSWER : ?
YOUR ANSWER : ?

The unit of work in S.I. units is

joule

Newton

erg

kg-m

TRUE ANSWER : ?
YOUR ANSWER : ?

The unit of angular velocity is

Both (B) and (C)

rad/s

Revolutions/min

m/min

TRUE ANSWER : ?
YOUR ANSWER : ?