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Question (21)

QN0023402

A barometer shows 995 mb. This most likely indicates:

(A) Normal pressure
(B) A depression or low-pressure system
(C) High altitude conditions
(D) Dry weather only

Correct Answer: B

Explanation:

A pressure below 1000 mb indicates a depression or low-pressure system.

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Question (22)

QN0023403

Normal atmospheric pressure at sea coast is approximately:

(A) 650 mb
(B) 850 mb
(C) 1013 mb
(D) 1500 mb

Correct Answer: C

Explanation:

Normal atmospheric pressure at sea level is about 1013 mb.

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Question (23)

QN0023404

Atmospheric pressure at a mountain station is 650 mb. How much lower is it than normal sea-level pressure of 1013 mb?

(A) 263 mb
(B) 353 mb
(C) 363 mb
(D) 463 mb

Correct Answer: C

Explanation:

1013 − 650 = 363 mb.

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Question (24)

QN0023405

People may feel breathless at high altitudes mainly because:

(A) Rainfall is high
(B) Air pressure and oxygen availability are lower
(C) Humidity is high
(D) Wind speed is low

Correct Answer: B

Explanation:

Lower air pressure means less oxygen is available for breathing.

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Question (25)

QN0023406

Which instrument measures atmospheric pressure?

(A) Barometer
(B) Thermometer
(C) Rain gauge
(D) Hygrometer

Correct Answer: A

Explanation:

A barometer is used to measure atmospheric pressure.

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Question (26)

QN0023407

Wind moves from:

(A) Low pressure to high pressure
(B) High pressure to low pressure
(C) Warm areas to cold areas only
(D) Sea to land only

Correct Answer: B

Explanation:

Wind always moves from areas of high pressure to low pressure.

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Question (27)

QN0023408

A farmer notices increasing wind speed. The soil is likely to:

(A) Become wetter
(B) Dry faster
(C) Freeze
(D) Become more fertile

Correct Answer: B

Explanation:

Greater wind speed increases evaporation and dries soil faster.

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Question (28)

QN0023409

Which instrument indicates wind direction?

(A) Wind vane
(B) Rain gauge
(C) Hygrometer
(D) Thermometer

Correct Answer: A

Explanation:

A wind vane shows the direction from which the wind is blowing.

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Question (29)

QN0023410

An anemometer is mainly used to measure:

(A) Humidity
(B) Temperature
(C) Wind speed
(D) Rainfall

Correct Answer: C

Explanation:

An anemometer measures the speed of the wind.

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Question (30)

QN0023411

If an anemometer rotates faster than usual, it indicates:

(A) Lower humidity
(B) Stronger winds
(C) Higher rainfall
(D) Lower pressure only

Correct Answer: B

Explanation:

Faster rotation means higher wind speed.

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Question (21)

A barometer shows 995 mb. This most likely indicates:

Explanation:

Link:

Question (22)

Normal atmospheric pressure at sea coast is approximately:

Explanation:

Link:

Question (23)

Atmospheric pressure at a mountain station is 650 mb. How much lower is it than normal sea-level pressure of 1013 mb?

Explanation:

Link:

Question (24)

People may feel breathless at high altitudes mainly because:

Explanation:

Link:

Question (25)

Which instrument measures atmospheric pressure?

Explanation:

Link:

Question (26)

Wind moves from:

Explanation:

Link:

Question (27)

A farmer notices increasing wind speed. The soil is likely to:

Explanation:

Link:

Question (28)

Which instrument indicates wind direction?

Explanation:

Link:

Question (29)

An anemometer is mainly used to measure:

Explanation:

Link:

Question (30)

If an anemometer rotates faster than usual, it indicates:

Explanation:

Link:

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