General Science (Physics) Practice Sets For WBCS Prelims P2

<< Prev PHYSICSNext >>

---

Page 2

155811. Which surface is a good absorber of heat?

A

White smooth surface

B

Black smooth surface

C

White rough surface

D

Black rough surface

D

Correct Answer: D. Black rough surface

255012. Transfer of heat by convection can take place in

A

solids and liquids

B

solids and vacuum

C

gasses and liquids

D

vacuum and gasses

C

Correct Answer: C. gasses and liquids

148713. The immersed portion of a piece of pure ice floating in water is

A

10/11th of its volume.

B

11/12th of its volume

C

8/9th of its volume.

D

9/10th of its volume.

D

Correct Answer: D. 9/10th of its volume.

153114. A solid piece of iron sinks in water but floats in mercury because -

A

the density of iron is more than that of water as well as mercury

B

the density of iron is more than that of water but less than that mercury

C

the average density of water and mercury is less than that of iron

D

the density of iron is less than that of water as well as mercury

B

Correct Answer: B. the density of iron is more than that of water but less than that mercury

157215. The radiant energy from the sun is due to

A

Nuclear fusion

B

Nuclear fission

C

chemical reaction

D

combustion

A

Correct Answer: A. Nuclear fusion

158716. Sound waves in air are

A

Electromagnetic

B

Polarized

C

Transverse

D

Longitudinal

D

Correct Answer: D. Longitudinal

148617. Given the Premises (i) A human cannot live without an atmosphere (ii) The moon is without atmosphere Then which of the following conclusions is valid?

A

The man cannot live on the moon

B

There is no life possible on the moon

C

Some men cannot live on the moon

D

All of these.

A

Correct Answer: A. The man cannot live on the moon

154818. The process of joining two or more blocks of ice by pressing each other is called

A

Regelation

B

Radiation

C

Refrigeration

D

None of the above

A

Correct Answer: A. Regelation

147619. An ice cube containing a large bubble of air is floating in the water contained in a large breaker. When the ice melts completely, the level of water will

A

Rise

B

First rise and then go down

C

Remain unchanged

D

Go down.

C

Correct Answer: C. Remain unchanged

151120. A rocket leaves the earth, lands on the moon and returns to earth. It will require the maximum energy to

A

Rise from the moon

B

Land on the earth

C

Rise from the earth

D

Land on the moon

C

Correct Answer: C. Rise from the earth

---

<< Prev PHYSICSNext >>