**MCQ on Pressure Class 8**. We covered all the MCQ on Pressure Class 8 content in this post for free. This MCQ is not just for 8th class students but for all who are looking for fluid pressure MCQ.

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## Fluid Pressure MCQ for School Students

## The relative density of a liquid can be determined using :

1. Boyle’s law

2. Newton’s law

3. Archimedes principle

4. Pascal’s law

Option 3 – Archimedes principle

## As we go to higher altitudes the atmospheric pressure

1. remains constant

2. increases

3. decreases

4. none of these

Option 3 – decreases

## Bramah press works on the principle of

1. Pascal’s law

2. Archimedes principle

3. Boyle’s law

4. Bernouli’s principle

Option 1 – Pascal’s law

## The widely used instrument to press the bales of cotton is

1. Hydraulic machine

2. Barometer

3. Altimeter

4. Spring balance

Option 1 – Hydraulic machine

## The unit of pressure in S.I. system

1. Dyne

2. Pascal

3. Newton

4. Erg

Option 2 – Pascal

## An iron sphere of density 8 gm/ce weighs 20 gm in air. Find the weight in water.

1.17

2. 1.75

3. 17.5 gm

4. None of the above

Option 3 – 17.5 gm

## Hydraulic machines work under the principle of

1. Boyle’s law

2. Archimedes law

3. Bernouli’s law

4. Pascal’s law

Option 4 – Pascal’s law

## Who was able to find the purity of the Gold ?

1. Boyle

2. Pascal

3. Archimedes

4. Bernouli

Option 3 – Archimedes

## A stone weighs 15 g in air and 12 g in water. What is its Relative density ?

1.3

2.5

3.27

4.43

Option 2 – 5

## Choose the physical quantity difference from others.

1. Density

2. Pressure

3. Thrust

4. Volume

Option 4 – Volume

## Choose the correct statement.

1. If the air flows with high speed the pressure exerted by it is larger.

2. If the pressure exerted on an enclosed gas increases density of the gas increases.

3. Density of humid air is greater than of dry air.

4. As altitude increases pressure of atmosphere increases

Option 2 – If the pressure exerted on an enclosed gas increases density of the gas increases.

## As altitude increases

1. Pressure increases

2. Density increases.

3. Density decreases

4. Both pressure and density increases

Option 3 – Density decreases

## The pair of physical quantities having the same unit is

1. Thrust and pressure

2. Thrust and weight

3. Force and pressure

4. Weight and pressure

Option 2 – Thrust and weight

## 1 kg.wt = ………

1.9.8 Newtons

2. 0.98 Newtons

3.8.9 Newtons

4. None

Option 1 – 9.8 Newtons

## 1k pa = ……. pa

1.100

2. 1000

3.10

4. 10,000

Option 2 – 1000

## The liquid used in Barometer is

1. water

2. alcohol

3. oil

4. mercury

Option 4 – mercury

## The force acting normal to the surface of a body is called

1. Pressure

2. Density

3. Weight

4. Thrust

Option 4 – Thrust

## The instrument used in aircraft to measure altitudes is

1. Barometer

2. Thermometer

3. Altimeter

4. Anemometer

Option 3 – Altimeter

## Blowing up of that ched roofs is an application of

1. Boyle’s law

2. Pascal’s law

3. Bernouli’s principle

4. Archimedes principle

Option 3 – Bernouli’s principle

We covered all the MCQ on pressure class 8 above in this post for free so that you can practice well for the exam.

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