41)

Which of the following is a pointing device used to move an object on the screen of a computer in any direction?

SSC CHSL 2021

A)

Modem

B)

Joystick

C)

Server

D)

Floptical

42)

Which of the following is responsible for producing green light in fireworks?

SSC CHSL 2021

A)

Silicon

B)

Potassium

C)

Sodium

D)

Barium

43)

Which of the following is an example of gravitational potential energy?

SSC CHSL 2021

A)

Water that is behind a dam

B)

Bullet fired from a gun

C)

Foot kicking a ball

D)

Moving car

44)

What is the boiling point of water at sea level?

SSC CHSL 2021

A)

150°C

B)

250°C

C)

100°C

D)

50°C

45)

______ is the process of allowing particles in suspension in water to settle out of the suspension under the effect of gravity.

SSC CHSL 2021

A)

Filtration

B)

Decantation

C)

Distillation

D)

Sedimentation

46)

What is the rate at which a wave moves through water, and is measured in knots?

SSC CHSL 2021

A)

Wave crest and trough

B)

Wave speed

C)

Wave height

D)

Wave frequency

47)

What is the name of the instrument used for measuring the speed and rate of flow of a fluid that is flowing in a pipe?

SSC CHSL 2021

A)

Venturimeter

B)

Cryometer

C)

Odometer

D)

Machmeter

48)

Infrared optical ______ can be used for measuring and monitoring temperatures and hot spots of jet engine rotor blades.

SSC CHSL 2021

A)

hygrometer

B)

ammeter

C)

pyrometer

D)

machmeter

49)

Which of the following is not a good conductor of electricity?

SSC CHSL 2021

A)

Graphite

B)

Gold

C)

Diamond

D)

Soil

50)

Big Bang theory explains:

SSC CHSL 2021

A)

origin of Universe

B)

origin of Stars

C)

origin of Galaxies

D)

origin of Solar System