Pressure – LearnITbyTests

1. Which statement about pressure is INCORRECT?

SI UNIT of pressure is N/m2

1 N/m2 = 1 Pa

Pressure = force/area

Pressure= force x area

Question 1 of 27

2. Which statement on pressure is INCORRECT?

Pressure increases with increase in force if the area is kept constant.

Pressure increases with decrease in area if force is kept constant

nothing happens

Pressure increases with increase with area if force is kept constant.

Question 2 of 27

3. Which is the biggest disadvantage of using an Aneroid Barometer

It is most reliable

It is NOT readily portable

It is adaptable to measure heights

It is used in aircrafts mostly to measure heights

Question 3 of 27

4. Toricellian Vacuum is the space above the mercury in the tube on a mercury barometer.

False

TRUE

Maybe

None

Question 4 of 27

5. Which are the reasons why a lift pump in real operations can only pump water in the height of less than the ideal limite of 10 m?

Due to leakages at the valves and pistons

due to operations in in places with Low atmospheric pressure because they are high above sea-level

recklessness

None of above

Question 5 of 27

6. Which of the following is not a property when choosing the brake fluid of a motor vehicle?

Should be incompressible

Should not corrode with mechanical parts of the brake system

Should have a low freezing point and high boiling point

Should be highly viscous and compressible

Question 6 of 27

7. Pressure in a liquid increases with density of the Liquid?

True

FALSE

Maybe

None

Question 7 of 27

8. Which of the following is NOT an application of Atmospheric Pressure?

Ability to suck soda in a bottle

Working of a barometer

A steamed bottled which is cooked and suddenly cooled crushes immediately

Falling of a man on a parachute slowly from a higher place.

Question 8 of 27

9. Which statement concerning pressure in Liquid is INCORRECT?

Pressure increases with depth

A swimmer as he/she dives deeper, the greater the pressure on them

Pressure decreases with depth

None of the above

Question 9 of 27

10. Toricellian Vacuum is important because:

It helps to give an actual value of measurement of atmospheric pressure.

The space accommodates a little mercury vapour and prevents the trapping of a air bubbles that would affect the accuracy of the barometer reading

no idea

The space ensures mercury fills the tube completely

Question 10 of 27

11. PRESSURE is the force acting normally or perpendicular per unit area?

True

FALSE

Maybe

None

Question 11 of 27

12. Define Pascals Principle

Pressure applied at one part in a liquid is transmitted equally to all other parts of the enclosed Liquid.

Pressure applied at one part in a confined gas is transmitted equally to all other parts of the confined gas so long as it is incompressible.

pressure depends on force

None of the above

Question 12 of 27

13. Which key two factors are directly proportional to the pressure of a liquid in a column i.e. U-tube

The density of the liquid

Height of the column

material of the U tube

Cross-section area of the U-tube

Question 13 of 27

14. Pressure in a liquid at a particular depth is the same in all directions?

FALSE

True

Maybe

None

Question 14 of 27

15. Name the INCORRECT application of transmission of pressure in Liquid

Hydraulic lifts used to hoist vehicles

Hydraulic brakes to stop motion of a car

Excavators for road construction

Microwave for cooking

Question 15 of 27

16. Which of the following statement is INCORRECT in the working principle of a bicycle pump?

When the pump handle is pushed in, the air in the pump barrel is decompressed

The high pressure in the barrel presses the Leather washer against the sides of the barrel.

When the pressure of the compressed air becomes greater than that of the air in the tyre, air is forced into the tyre through the tyre valve which now opens.

When the pump handle is pushed in the air in the pump barrel is compressed.

Question 16 of 27

17. The lift pump is among the application of pressure in gasses. Kindly state the Limit height it operates on?

15m

10m

20m

Not less than 10m

Question 17 of 27

18. The atmospheric pressure at sea level using a Fortin barometer is:

760mmHg

76cmHg

740cmHg

72cmHg

Question 18 of 27

19. What are the differences that a force pump has over a lift pump?

It enables a continuous flow of water

The height to which water can be raised by this pump does NOT depend on Atmospheric Pressure.

no idea

A lift- pump has compressed air unlike the force pump.

Question 19 of 27

20. Why is mercury a preferable fluid chosen in barometer unlike water?

Mercury is much denser (14 times) than water

Mercury gives a shorter and measureable column to indicate Atmospheric Pressure.

water is pure than mercury

Mercury is expensive than water.

Question 20 of 27

21. Fluid pressure formula is P = hpg

True

FALSE

Maybe

None

Question 21 of 27

22. Which of the following Liquid pressure formula is INCORRECT?

P1 = P2

F1 x A2= F2 x A1

P1 = F2/A1

F2/F1 = A2/A1

Question 22 of 27

23. The pressure exerted on the earth surface by the weight of the earths air column is called atmospheric pressure.

True

FALSE

Maybe

None

Question 23 of 27

24. Which of the following statements is INCORRECT about a U-tube Manometer?

A Manometer is an instrument used to measure fluid pressure

Its U-tube is filled with water or any other liquid

One end of the manometer tube is connected to the fluid supply and the other end is open to the atmospheric pressure.

The difference in water levels is the sum of fluid pressure and atmospheric pressure

Question 24 of 27

25. How is a Fortin Barometer different from a Simple Mercury Barometer?

It is used for accurate measurement

It is used when high precision reading is required.

used when one does not have money

It is used as the last resort measuring equipment

Question 25 of 27

26. Which of the following instrument is not used to measure fluid pressure?

U-tube Manometer

Aneroid Barometer

Mercury Barometer

Viscometer

Question 26 of 27

27. Which of the following instrument is made up of a bourdon flexible tube?

Mercury barometer

Aneroid Barometer

Pressure Gauge

Fortin Barometer

Question 27 of 27

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