Time Left:
600
sec
1. Pressure is defined as
A. Force × Area
B. Force ÷ Area
C. Area ÷ Force
D. Force + Area
2. The S.I.unit of pressure is
A. Newton
B. Pascal
C. Joule
D. Watt
3. Thrust is the
A. Area over which force acts
B. Force acting on a surface perpendicular to it
C. Friction acting on surface
D. Mass per unit area
4. Pressure exerted by a liquid depends on
A. Depth, density, gravity
B. Mass only
C. Volume only
D. Surface area only
5. Which of the following exerts more pressure on the ground?
A. A person standing on feet
B. The same person standing on tiptoe
C. Both same
D. None
6. Why do snowshoes prevent sinking into snow?
A. Reduce weight
B. Reduce thrust
C. Increase area → decrease pressure
D. Increase density
7. The pressure at the bottom of a liquid column is independent of
A. Height of liquid
B. Density of liquid
C. Shape of container
D. Acceleration due to gravity
8. A liquid exerts pressure
A. Only downward
B. Equally in all directions
C. Only upward
D. Only sideways
9. Atmospheric pressure is caused by
A. Air molecules colliding
B. Water molecules colliding
C. Gravity of Earth
D. Friction of air
10. Pressure under water increases with
A. Temperature
B. Depth
C. Speed of water
D. Container size
11. Upthrust is
A. Downward force in liquid
B. Force that makes object sink
C. Upward force on object submerged in liquid
D. Frictional force
12. Archimedes’ principle states that
A. Upthrust = Weight of object
B. Upthrust = Weight of fluid displaced
C. Pressure = Force/Area
D. Pressure acts downwards
13. Whether an object floats or sinks depends on
A. Its color
B. Its density relative to fluid
C. Its size only
D. Shape only
14. If an object is less dense than water, it will
A. Sink
B. Float
C. Hover
D. Explode
15. An object denser than water
A. Always floats
B. Always sinks
C. Floats sometimes
D. Becomes lighter
16. Upthrust depends on
A. Volume of object submerged
B. Area of object
C. Weight of object only
D. Shape of object only
17. Floating occurs when
A. Upthrust < Weight
B. Upthrust = Weight
C. Upthrust > Weight
D. None
18. Sinking occurs when
A. Upthrust > Weight
B. Upthrust < Weight
C. Upthrust = Weight
D. Upthrust = 0
19. A hollow object floats because
A. Its weight is reduced
B. Its effective density is less than water
C. It becomes lighter in water
D. Water pushes it down
20. Boats float because
A. Made of metal
B. Shape increases upthrust
C. Less weight only
D. Water supports everything
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