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

2. 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)
A100.11
B200.20.01
C300.1300
D400.28
3. 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?
4. The diagram shows a glass block resting on a table top.

The area of the block in contact with the table is X and the area of the table top is Y.

The weight of the block is P and the weight of the table is Q.

Which expression gives the pressure exerted on the table by the block?
5. A small table weighing 40 N stands on four legs, each having an area of $0.001 \text{ m}^{2}$. What is the pressure of the table on the floor?
6. 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 $cm^{2}$.
7. A brick of weight 80 N stands upright on the ground as shown.

What is the pressure it exerts on the ground?
8. A gas is trapped inside a cylinder by a movable piston. The length of the gas column is 50 cm and the pressure inside the cylinder is p.

The piston is pushed in a distance of 30 cm, so that the length of the gas column is now 20 cm. The temperature of the gas does not change.

What is the new pressure of the gas?
9. 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.
10. Which of the following does not affect the pressure beneath the surface of a liquid?

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### 16 thoughts on “Practice MCQs For Pressure”

1. Can anyone explain me that how the answer of mcq no7 is p/3

• idk either

• Height of the liquid column increased by 40 cm, which means new height is 60 cm. volume increases 3 times, which in turn makes the pressure decrease to 1/3 so answer is p/3

2. how can i get the answers….

3. I think here, in question 9 the answer (a) shall be
5.0 x 10^-3
5.0 x 10^3

• Can you show how you arrive at $5.0 \times 10^{-3}$?

• its 5.0 x 10^4

4. physics

• same bro

5. How can i get the answers of this quiz

• @Aisha
You have to answer the quiz and you will get the correct answers upon the submission of the answers you gave to the questions.

• Click on “I am not a robot” which is at the bottom section of the page.
Then click “Submit”.
And the checked page will be opened.