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Question (11)

QN002151

Why do people place a round cloth under loads carried on their heads?

(A) To increase pressure
(B) To reduce area
(C) To reduce pressure by increasing area
(D) To increase weight

Correct Answer: C

Explanation:

Increasing area reduces pressure.

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Question (12)

QN002152

The pressure exerted by a liquid depends mainly on:

(A) Colour of liquid
(B) Shape of vessel
(C) Height of liquid column
(D) Material of vessel

Correct Answer: C

Explanation:

Pressure increases with height of liquid column.

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Question (13)

QN002153

A liquid column of greater height causes:

(A) Less pressure
(B) Equal pressure
(C) Greater pressure
(D) No pressure

Correct Answer: C

Explanation:

Greater height produces greater pressure.

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Question (14)

QN002154

In Activity 6.1, two pipes of different diameters produced equal balloon bulges because:

(A) Water weights were equal
(B) Pipe lengths were different
(C) Heights of water columns were equal
(D) Balloons were different

Correct Answer: C

Explanation:

Equal heights produced equal pressure.

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Question (15)

QN002155

Why are overhead water tanks placed at a height?

(A) To save space
(B) To reduce pressure in taps
(C) To increase water pressure in taps
(D) To cool the water

Correct Answer: C

Explanation:

Greater height gives greater water pressure.

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Question (16)

QN002156

A tank is raised from 5 m to 10 m height. The water pressure at the tap will:

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

Correct Answer: C

Explanation:

Water pressure increases with height.

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Question (17)

QN002157

Liquids exert pressure:

(A) Only downward
(B) Only sideways
(C) Only upward
(D) In all directions

Correct Answer: D

Explanation:

Liquids exert pressure in all directions.

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Question (18)

QN002158

Water spurting out from holes in a pipe shows that liquids exert pressure on:

(A) Bottom only
(B) Surface only
(C) Walls of the container
(D) Air only

Correct Answer: C

Explanation:

Liquids exert pressure on the walls of containers.

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Question (19)

QN002159

Why is the base of a dam broader than the top?

(A) Decoration purpose
(B) Pressure of water is larger near the bottom
(C) Less water is stored at top
(D) To reduce gravity

Correct Answer: B

Explanation:

Water pressure increases with depth.

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Question (20)

QN002160

Atmospheric pressure is the pressure exerted by:

(A) Water vapour only
(B) Nitrogen only
(C) Air around us
(D) Oxygen only

Correct Answer: C

Explanation:

Atmospheric pressure is exerted by the surrounding air.

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Question (11)

Why do people place a round cloth under loads carried on their heads?

Explanation:

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Question (12)

The pressure exerted by a liquid depends mainly on:

Explanation:

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Question (13)

A liquid column of greater height causes:

Explanation:

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Question (14)

In Activity 6.1, two pipes of different diameters produced equal balloon bulges because:

Explanation:

Link:

Question (15)

Why are overhead water tanks placed at a height?

Explanation:

Link:

Question (16)

A tank is raised from 5 m to 10 m height. The water pressure at the tap will:

Explanation:

Link:

Question (17)

Liquids exert pressure:

Explanation:

Link:

Question (18)

Water spurting out from holes in a pipe shows that liquids exert pressure on:

Explanation:

Link:

Question (19)

Why is the base of a dam broader than the top?

Explanation:

Link:

Question (20)

Atmospheric pressure is the pressure exerted by:

Explanation:

Link:

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