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Physics MCQs Quiz For Entry Test
1. Drag force increases if speed of the object moving through the fluid:
None of these
Remains constant
Decreases
Increases (Answer)
2. A body passing through a viscous medium is affected by:
Four forces
One force only
Two forces (Answer)
None of these
3. Normally, the pressure of blood inside the walls is ------------- the external atmospheric pressure.
Greater than (Answer)
None of them
Smaller than
Equal to
4. Normally, the blood pressure (torr unit) in a healthy human body varies from:
150 to 70
200 to 100
100 to 60
120 to 80 (Answer)
5. Glycerin has viscosity ------------- the viscosity of water,
Equal to
None of these
Less than
More than (Answer)
6. Fog droplets are suspended in air when their weight is balanced by:
None of these
Force of gravity
Upward thrust due to air (Answer)
Surface tension
7. Machine parts are jammed due to:
Decrease in surface tension of lubricants
Increase in viscosity of lubricant (Answer)
Decrease in viscosity of lubricant
None of these
8. The irregular or unsteady flow of the fluid is called:
Turbulent flow (Answer)
Streamline flow
Laminar flow and Streamline flow
Laminar flow
9. If A, v, t denote area of the pipe, velocity of the fluid and time, respectively, then Avt will represent:
Mass
Charge
Density
Volume (Answer)
10. An equation in fluid dynamics relates pressure, fluid speed and height. This equation is called:
None of these
Venturi equation
Bernoulli's equation (Answer)
Equation of continuity
11. In a ------- flow, each particle of the fluid is called a streamline and different streamlines ----------- cross each other.
Streamline, can
Turbulent, cannot
None of these
Streamline, cannot (Answer)
12. The direction of the velocity of fluid at certain point and direction of streamline are:
Same (Answer)
Converging
Diverging
Different from each other
13. The property of fluids due to which they resist their own flow is called:
Viscosity (Answer)
Surface tension
None of these
Drag force
14. The resistance offered by a fluid to a solid moving inside it is called:
Surface tension
None of these
Drag force (Answer)
Viscocity
15. While deriving Bernoulli's equation, the law of conservation of ----------- becomes the base fact.
Energy (Answer)
Mass
Ampere
Charge
