atmosphere & climatology section 7 Practice Questions Answers Test with Solutions & More Shortcuts

Question : 16 [CDS 2016-II]

Which one of the following statements is correct?

a) Cold fronts normally move faster than warm fronts and therefore frequently overtake the warm fronts.

b) Cold fronts move at slower rate than warm fronts and therefore cannot overtake the warm fronts.

c) Cold fronts move faster than warm fronts but they cannot overtake the warm fronts.

d) Cold fronts move at slower rate, and eventually they are overtaken by the warm fronts.

Question : 17

What causes snowfall?

a) When rain freezes into snow flakes while passing through the atmosphere.

b) When condensation takes place below 0°C and precipitation occurs in the form of flakes.

c) When the air temperature is much lower than surface temperature.

d) When condensation takes place in the form of fog and precipitation occurs as flakes.

Question : 18 [NDA 2017-I]

Most of the communication satellites today are placed in a geostationary orbit. In order to stay over the same spot on the Earth, a geostationary satellite has to be directly above the

a) Either North or South Pole

b) Tropic of Cancer

c) Tropic of Capricorn

d) Equator

Question : 19

The atmospheric layer which reflects radio waves is called

a) Ionosphere

b) Exosphere

c) Troposphere

d) Stratosphere

Question : 20

Consider the following statements:

1. The approach of a cyclone is characterised by a rise in barometric reading.
2. In the cyclones of the Northern hemisphere, the winds circulate in an anticlockwise direction.

a) 2 only

b) 1 only

c) Neither 1 nor 2

d) Both1 and 2