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.

Back To O Level Physics

Back To List of O Level Physics Quiz

Enter email to receive results:

1. 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?

$\frac{\rho}{3}$

$2 \rho$

$3 \rho$

$\frac{\rho}{2}$

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

an empty lorry with four wheels

a loaded lorry with four wheels

a loaded lorry with six wheels

an empty lorry with six wheels

3. Find the pressure exerted on a person by a few plastic blocks of total mass 42 kg, the bottom of which in contact with the person has an area of 840 $cm^{2}$.

$5.0 \times 10^{3}$

$5.5 \times 10^{4}$

$2.5 \times 10^{4}$

$3.0 \times 10^{3}$

4. 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.

Atmospheric pressure on the bubbles increases.

Atmospheric pressure on the bubbles decreases.

Water pressure on the bubbles decreases.

5. An air bubble is inside a air-tight cylinder fitted with a piston. What happens to the air bubble when the piston is pushed in? Note that the air bubble is surrounded by air in the cylinder. Assume that the there is still enough space for the air bubble to "survive" after the piston is pushed in.

Explodes

Expands

Vibrates

Contracts

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 $cm^{2}$.

3000 N

400 N

300 N

600 N

7. 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 decreases, because atmospheric pressure decreases with height.

It decreases, because atmospheric pressure increases with height.

It increases, because atmospheric pressure decreases with height.

It increases, because atmospheric pressure increases with height.

8. 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

B

C

D

A

9. 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 S.

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

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

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

10. Which of the following does not affect the pressure beneath the surface of a liquid?

area of the liquid surface

depth of the liquid

strength of the gravitational field

density of the liquid

 Loading...

 

Back To O Level Physics

Back To List of O Level Physics Quiz