Kerala PSC Examination Expected Questions - 361 (SCIENCE)

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171. A type of stone that can float on water:

(a)Marble
(b) Limestone
(c) Pumice stone
(d) Gem stone

Answer:- Pumice stone

172. The expected energy of electrones at absolute zero is called:

(a)Work function
(b) Potential energy
(c) Emission energy
(d) Fermi Energy

Answer:- Fermi Energy

173. The freezer in a refrigerator is fitted near the top:

(a)to keep it away from the heat compressor which is near the bottom
(b) because of convenience
(c) so that it can cool the whole interior by setting up convection currents
(d) without any specific purpose

Answer:- so that it can cool the whole interior by setting up convection currents

174. Voyager I is related to which country?

(a)China
(b) India
(c) Russia
(d) USA

Answer:- USA

175. It is difficult to work on ice because of:

(a)Absense of friction
(b) More friction
(c) Less inertia
(d) Abesense of inertia

Answer:- Absense of friction

176. The electromagnetic waves do not transport:

(a)Charge
(b) Energy
(c) Information
(d) Momentum

Answer:- Information

177. Kaleidoscope is based on the principle of:

(a)Reflection
(b) Multiple Reflection
(c) Total internal reflection
(d) Refraction

Answer:- Multiple Reflection

178. The most common use of silicon hydrogels in making which among the following?

(a)Surgery equipment
(b) Breast transplants
(c) Contact lenses
(d) Capsules of medicines

Answer:- Contact lenses

179. ‘Centrino’ is related to:

(a) Photography
(b) Mobile technology
(c) Bio technology
(d) Missile technology

Answer:- Mobile technology

180. Which physical property does not change with quality?

(a)Volume
(b) Weight
(c) Mass
(d) Density

Answer:- Density