G.K. Practice Test: Question Set - 10
1. The ozone layer of the earth is useful for living beings because
- (A) It
serves as the source of oxygen by decomposing air
- (B) It maintains
the nitrogen cycle of the earth
- (C) It
maintains the temperature of the earth
- (D) It protects
them from excessive ultraviolet rays of the sun
2. When the Sun reaches its maximum distance from the equator, it is known as
- (A) Solstice
- (B) Eclipse
- (C) Equinox
- (D) Sidereal Day
3. Imaginary lines drawn on a global map from pole to pole and from the perpendicular to the equator are called
- (A) Contours
- (B) Isobars
- (C) Meridians
- (D) Steppes
4. Gravity setting chambers are used in industries to remove
- (A) SOX
- (B) NOX
- (C) Suspended
particulate matter
- (D) CO
5. A pond may be referred to as
- (A) An
artificial ecosystem
- (B) A natural
ecosystem
- (C) A biome
- (D) A
community of plants and animals
6. Fathometer is used to measure
- (A) Earthquakes
- (B) Rainfall
- (C) Ocean depth
- (D) Sound
intensity
7. At the equator, the duration of a day is
- (A) 10 hrs
- (B) 12 hrs
- (C) 14 hrs
- (D) 16 hrs
8. The term “Refraction of light” means
- (A) Bending
of light rays when they enter from one medium to another medium
- (B) Bending
of light round the corners of obstacles and apertures
- (C) Coming
back of light from a bright smooth surface
- (D) None of
these
9. Fish plates in Railway tracks are used to
- (A) Connect two
rails
- (B) Join two
coaches
- (C) Guide the
wheels
- (D) Avoid fishes
on the track
10. On a night when the sky is clear, the temperature may dip considerably; on a cloudy night the temperature will usually dip much less. The reason for this difference is that
- (A) The
clear sky allows radiant energy to escape readily from the earth
- (B) On
a cloudy night the clouds are warm and therefore retard the cooling
- (C) The clear sky
allows the cold of outer space to reach the earth
- (D) Current
of air carry the heat away from the earth on a clear night
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