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.

The quiz comprises of 10 questions, which are randomly selected from a large pool of questions. After completion, you can refresh the page and try the quiz again for a new set of 10 questions.

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1. A brick of weight 80 N stands upright on the ground as shown.

What is the pressure it exerts on the ground?

$\frac{20 \times 10}{80} \, \text{N cm}^{-2}$

$\frac{80}{20 \times 10} \, \text{N cm}^{-2}$

$\frac{10 \times 5}{80} \, \text{N cm}^{-2}$

$\frac{80}{10 \times 5} \, \text{N cm}^{-2}$

2. 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 increases with height.

It decreases, because atmospheric pressure increases with height.

It increases, because atmospheric pressure decreases with height.

It decreases, because atmospheric pressure decreases with height.

3. The diagram shows a simple mercury barometer. Which height is a measure of the atmospheric pressure?

D

A

B

C

4. 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?

960 kPa

480 kPa

60 kPa

240 kPa

5. 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 $cm^{2}$.

3000 N

600 N

300 N

400 N

6. Bubbles of gas, escaping from the mud at the bottom of a deep lake, rise to the surface.

As the bubbles rise, they get larger.

Why is this?

Water pressure on the bubbles increases.

Water pressure on the bubbles decreases.

Atmospheric pressure on the bubbles increases.

Atmospheric pressure on the bubbles decreases.

7. Air is trapped in a cylinder by a piston. The pressure of the air is $\rho$ and the length of the air column is 20 cm.

The piston is moved outwards until the length of the air column has increased by 40 cm.

The temperature of the air remains constant.

What is the new air pressure?

$\frac{\rho}{2}$

$3 \rho$

$\frac{\rho}{3}$

$2 \rho$

8. Which graph shows the relationship between the pressure and volume of a fixed mass of gas at constant temperature?

C

A

B

D

9. A manometer is connected to a gas supply.

Pressure can be measured in cm of water.

What is the pressure of the gas?

8 cm of water more than atmospheric pressure

8 cm of water less than atmospheric pressure

12 cm of water less than atmospheric pressure

12 cm of water more than atmospheric pressure

10. A block of wood measuring 5 m long, 4 m wide and 0.5 m thick is placed on a table. Find the pressure exerted on the table due to the block if the mass of the block is 4000 kg.

2000 Pa

4000 Pa

400 Pa

200 Pa

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