ECAT Pre Engineering Physics Chapter 6 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 6 Fluid Dynamics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 6 Fluid Dynamics

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Physics ECAT Pre Engineering Chapter 6 Fluid Dynamics

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Question # 1

A body is floating in a liquid. The up thrust on the body is

Question # 2

The dimensions of viscosity are:

Question # 3

The value of viscosity of a fluid is dependent on (at constant temperature)

Question # 4

Bernoulli's equation is based upon law of conversation

Question # 5

A tube tapers from 20 cm diameter to 2 cm, the velocity at first cross-section is 50 ms-1then velocity at second cross-section is

Question # 6

The SI unit of viscosity is

Question # 7

In a _____ flow, each particle of the fluid is called a streamline and different streamlines ______cross each other.

Question # 8

Above a certain velocity of a fluid is called

Question # 9

If the flow is incompressible and the flow is steady then the mass of the fluid through the pipe

Question # 10

The irregular and unsteady flow of the fluid is called

Question # 11

Internal friction of fluid is called

Question # 12

What are the SI base units of the coefficient of viscosity

Question # 13

A person standing near the track of a fast moving train has tendency to fall towards it because of

Question # 14

Fire fighters have a jet attached to the head of their water pipes in order to head of their water pipes in order to

Question # 15

Terminal velocity is the maximum velocity attained by a spherical droplet when the drag force______the weight of droplet:

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 When a water droplet falls through air, the net force on it is
A. Net force = drag force - weight
B. Net force = weight - drag force
C. Net force = drag force + weight
D. Net force = weight + drag force
2 Surface tension of water is reduced by adding
A. Detergents
B. Camphor
C. Plastic
D. Both A and B
3 Glycerin has viscosity _____ the viscosity of water:
A. More than
B. Equal to
C. Less than
D. None of these
4 A body is floating in a liquid. The up thrust on the body is
A. Equal to weight of liquid displaced
B. Zero
C. Less than the weight of liquid displaced
D. Weight of body-weight of liquid displaced
5 The value of viscosity of a fluid is dependent on (at constant temperature)
A. the fluid itself
B. the fluid and its container
C. anything in contact with the fluid
D. all of the above
6 In deriving the Bernoulli's equation, we assume that the fluid is
A. incompressible
B. no viscous
C. flows in a steady manner
D. all of them
7 The law of conservation of mass gives us the
A. equation of continuity
B. Bernoulli's theorem
C. both of them
D. none of them
8 At high altitude the blood oozes out of the nose and ear because
A. The blood pressure increase at high altitudes
B. The percentage of oxygen in the air increase
C. The atmospheric pressure decrease there
D. The density of blood decrease at high altitudes
9 Liquids and gasses have
A. zero viscosity
B. non-zero viscosity
C. very large viscosity
D. very small viscosity
10 The velocity of falling raindrops attains limited value because of
A. Up thrust of air
B. Air currents of the earth atmosphere
C. Surface tension effect
D. Viscous force exerted by air

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