# 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. 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.
2. 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?
3. Which graph shows the relationship between the pressure and volume of a fixed mass of gas at constant temperature?

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?
5. 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?
6. 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?
7. A manometer is connected to a gas supply.

Pressure can be measured in cm of water.

What is the pressure of the gas?
8. 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 $cm^{2}$.
9. A barometer is carried up on a balloon. Why does the reading on the barometer fall?
10. Which of the following does not affect the pressure beneath the surface of a liquid?

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

1. How The question no.6 answer is 2000 pascal?
Its supposed to be 200 pascal, with the rule .
P=F/A
P=4000/5×4
= 4000/20
=200.

How 2000?

2. 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

3. how can i get the answers….

4. 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

5. physics

• same bro

6. 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.