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Question (1)

QN002231

High-speed winds generally create:

(A) High pressure regions
(B) Low pressure regions
(C) Equal pressure everywhere
(D) Vacuum only

Correct Answer: B

Explanation:

High-speed winds create low pressure regions.

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Question (2)

QN002232

Fast-moving air above a roof lowers the pressure:

(A) Below the roof
(B) Inside the walls
(C) Above the roof
(D) Under the ground

Correct Answer: C

Explanation:

Fast-moving air reduces pressure above the roof.

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Question (3)

QN002233

Roofs may blow away during storms because:

(A) Pressure above the roof becomes greater
(B) Pressure inside the house becomes lower
(C) Pressure above the roof becomes lower than inside
(D) Gravity decreases suddenly

Correct Answer: C

Explanation:

Lower pressure above creates upward force on the roof.

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Question (4)

QN002234

A wind exerts a force of 600 N on an area of 12 m². Find the pressure.

(A) 25 Pa
(B) 50 Pa
(C) 72 Pa
(D) 7200 Pa

Correct Answer: B

Explanation:

Pressure = 600 ÷ 12 = 50 Pa

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Question (5)

QN002235

Which condition is mainly responsible for lifting weak roofs during storms?

(A) Increase in outside pressure
(B) Decrease in inside pressure
(C) Difference between inside and outside pressure
(D) Absence of gravity

Correct Answer: C

Explanation:

Pressure difference creates lifting force.

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Question (6)

QN002236

High-speed air moving over a surface causes the air pressure there to:

(A) Increase
(B) Become zero
(C) Decrease
(D) Remain unchanged

Correct Answer: C

Explanation:

Faster moving air lowers pressure.

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Question (7)

QN002237

During a cyclone, windows are sometimes opened to:

(A) Increase indoor pressure
(B) Reduce pressure difference
(C) Stop air movement completely
(D) Increase wind speed indoors

Correct Answer: B

Explanation:

Opening windows helps equalize pressure.

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Question (8)

QN002238

A pressure difference of 300 Pa acts over an area of 5 m². What force acts on the roof?

(A) 60 N
(B) 150 N
(C) 600 N
(D) 1500 N

Correct Answer: D

Explanation:

Force = 300 × 5 = 1500 N

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Question (9)

QN002239

Which example best demonstrates lowering of pressure due to fast-moving air?

(A) Rusting of iron
(B) Dissolving salt in water
(C) Roof blowing off during storm
(D) Melting of ice

Correct Answer: C

Explanation:

Roof lifting occurs due to low pressure above.

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Question (10)

QN002240

The pressure exerted by moving air depends on:

(A) Colour of air
(B) Speed of air
(C) Shape of clouds only
(D) Temperature of soil only

Correct Answer: B

Explanation:

Air pressure changes with wind speed.

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Question (1)

High-speed winds generally create:

Explanation:

Link:

Question (2)

Fast-moving air above a roof lowers the pressure:

Explanation:

Link:

Question (3)

Roofs may blow away during storms because:

Explanation:

Link:

Question (4)

A wind exerts a force of 600 N on an area of 12 m². Find the pressure.

Explanation:

Link:

Question (5)

Which condition is mainly responsible for lifting weak roofs during storms?

Explanation:

Link:

Question (6)

High-speed air moving over a surface causes the air pressure there to:

Explanation:

Link:

Question (7)

During a cyclone, windows are sometimes opened to:

Explanation:

Link:

Question (8)

A pressure difference of 300 Pa acts over an area of 5 m². What force acts on the roof?

Explanation:

Link:

Question (9)

Which example best demonstrates lowering of pressure due to fast-moving air?

Explanation:

Link:

Question (10)

The pressure exerted by moving air depends on:

Explanation:

Link:

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