Practice MCQs For Pressure

This quiz contains practice questions for GCE ‘O’ level topic: Pressure. There are explanations for some of the questions after you submit the quiz. If you could not figure out why a particular option is the answer, feel free to drop a comment below or ask a question in ‘O’ & ‘A’ Level Discussion section of the forum. If you wish to contribute questions to this quiz, please contact us.

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1. A manometer is connected to a gas supply.

Pressure can be measured in cm of water.

What is the pressure of the gas?

12 cm of water more than atmospheric pressure

12 cm of water less than atmospheric pressure

8 cm of water more than atmospheric pressure

8 cm of water less than atmospheric pressure

2. Which of the following will cause the height of the mercury column in a barometer, A, to be higher than  that of another barometer, B, located at sea level?

Introduce some air into barometer A, in the space above the mercury column.

Bring A into a deep underground mine.

Bring A up a mountain.

Bring A to the moon and place it out in the open.

3. The diagram above shows a cylindrical container with diameter 0.5 m containing a liquid of density 750 $kg \, m^{-3}$. Find the pressure exerted by the liquid on the base of the container.

$1.5 \times 10^{4}$ Pa

$7.5 \times 10^{2}$ Pa

$7.5 \times 10^{3}$ Pa

$1.5 \times 10^{3}$ Pa

4. The diagrams show, to the same scale, the vertical sections of a set of circular vessels, each containing the same depth of water.

Which one of the following statements is correct?

The water exerts the greatest pressure on the base of vessel P.

The water exerts the same pressure on the base of each vessel.

The water exerts the same force on the base of each vessel.

The water exerts the greatest pressure on the base of vessel S.

5. A manometer is connected to a gas supply.

Pressure can be measured in cm of water.

What is the pressure of the gas?

12 cm of water more than atmospheric pressure

8 cm of water more than atmospheric pressure

12 cm of water less than atmospheric pressure

8 cm of water less than atmospheric pressure

6. If the pressure exerted on a floor by a box is 200 kPa, find the weight of the box, given that the bottom of the box has a contact area of 20 $cm^{2}$.

600 N

400 N

300 N

3000 N

7. Which would be the least likely to sink into soft ground?

a loaded lorry with six wheels

an empty lorry with four wheels

a loaded lorry with four wheels

an empty lorry with six wheels

8. A gas occupies a volume of $2.0 \text{ m}^{3}$ in a cylinder at a pressure of 240 kPa. A piston compresses the gas until the volume is $0.50 \text{ m}^{3}$, the temperature remaining constant.

What is the new pressure of the gas?

60 kPa

240 kPa

480 kPa

960 kPa

9. Objects of different weights are placed on a rigid, horizontal surface.

Which row shows the correct pressure acting on the surface?

	Weight (N)	Area in contact ($m^{2}$)	Pressure (Pa)
A	10	0.1	1
B	20	0.2	0.01
C	30	0.1	300
D	40	0.2	8

A

D

B

C

10. The diagram shows a manometer containing mercury that is sealed at one end.

What happens to the distance h when the manometer is taken to the top of a mountain?

It increases, because atmospheric pressure decreases with height.

It decreases, because atmospheric pressure decreases with height.

It decreases, because atmospheric pressure increases with height.

It increases, because atmospheric pressure increases with height.

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