Pressure in a fluid is defined as:
a) Force per unit area
b) Mass per unit volume
c) Volume per unit time
d) Density per unit volume
The SI unit of pressure is:
a) Newton
b) Pascal
c) Joule
d) Watt
Pressure in a liquid increases with:
a) Decreasing depth
b) Increasing depth
c) Decreasing density
d) Increasing temperature
Which of the following factors affects the pressure in a fluid?
a) Fluid density
b) Depth of the fluid
c) Gravitational acceleration
d) All of the above
The formula for pressure due to a liquid column is:
a)
𝑃
=
𝐹
/
𝐴
P=F/A
b)
𝑃
=
𝜌
𝑔
ℎ
P=ρgh
c)
𝑃
=
𝑚
𝑔
ℎ
P=mgh
d)
𝑃
=
𝑚
𝑣
2
/
𝑟
P=mv
2
/r
𝑃
=
𝜌
𝑔
ℎ
P=ρgh
Which statement about pressure in a liquid is correct?
a) Pressure acts only downwards
b) Pressure is the same in all directions at a given depth
c) Pressure decreases with depth
d) Pressure does not depend on density
A dam is built thicker at the bottom than at the top because:
a) Water pressure decreases with depth
b) Water pressure increases with depth
c) Water has a high surface tension
d) The dam must support the weight of the air
Atmospheric pressure at sea level is approximately:
a) 101.3 Pa
b) 101.3 kPa
c) 1013 kPa
d) 1.013 Pa
Which instrument is used to measure atmospheric pressure?
a) Thermometer
b) Hydrometer
c) Barometer
d) Manometer
A barometer is used to measure:
a) Liquid pressure
b) Air pressure
c) Hydraulic pressure
d) Vacuum pressure
If the depth of water is doubled, the pressure at the bottom will:
a) Remain the same
b) Double
c) Be halved
d) Increase four times
In a liquid, pressure at the same depth is:
a) Greater at the surface
b) The same in all directions
c) Greater in horizontal direction
d) Zero
Hydraulic brakes work based on:
a) Boyle’s law
b) Archimedes’ principle
c) Pascal’s principle
d) Bernoulli’s theorem
An open tube manometer measures:
a) Absolute pressure
b) Atmospheric pressure
c) Gauge pressure
d) Fluid density
Which of the following is an example of pressure transmission in fluids?
a) Water boiling
b) Hydraulic press
c) Ice melting
d) Thermal conduction
What happens to atmospheric pressure as altitude increases?
a) It remains constant
b) It increases
c) It decreases
d) It fluctuates randomly
Which property of a fluid affects its pressure at a given depth?
a) Temperature
b) Density
c) Color
d) Shape of container
Why does a suction pump work?
a) It removes air to create a vacuum
b) It increases fluid density
c) It reduces temperature
d) It adds extra force to the liquid
The pressure at a depth in a fluid is independent of:
a) The fluid’s density
b) The depth of the fluid
c) The gravitational field strength
d) The surface area of the liquid
What happens when an airtight can is suddenly cooled after being heated?
a) It expands
b) It collapses
c) It remains unchanged
d) It explodes
Gauge pressure is the pressure:
a) Below atmospheric pressure
b) Above atmospheric pressure
c) Equal to atmospheric pressure
d) At zero pressure
Why do deep-sea divers wear special suits?
a) To increase their weight
b) To reduce friction
c) To withstand high water pressure
d) To swim faster
Which of the following does not affect the pressure exerted by a liquid column?
a) Height of the liquid
b) Density of the liquid
c) Gravitational acceleration
d) Shape of the container
A hydraulic system multiplies force using:
a) Fluid density
b) Differences in pressure
c) Differences in temperature
d) Surface area variation
Which statement about liquid pressure is incorrect?
a) It depends on liquid density
b) It increases with depth
c) It acts in only one direction
d) It acts equally in all directions at a given depth
Why does an air bubble rise in water?
a) Its density is greater than water
b) It has zero pressure
c) It is lighter than water
d) Water pressure pushes it downward
As you go deeper into a swimming pool, the pressure:
a) Increases
b) Decreases
c) Stays the same
d) Becomes zero
If a liquid exerts equal pressure in all directions at a given depth, it is demonstrating:
a) Boyle’s law
b) Pascal’s principle
c) Archimedes’ principle
d) Newton’s second law
Which of these statements about air pressure is true?
a) It does not change with altitude
b) It increases with altitude
c) It decreases with altitude
d) It remains constant at all heights
