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

At the starting point of the free fall motion of an object, its acceleration will be

Question # 2

Where the streamlines are very close to each other, the pressure will be

Question # 3

The _____ viscous the medium is _____, is the value of terminal velocity of the droplet:

Question # 4

One torr is equal to

Question # 5

The terminal velocity of a small size spherical body of radius R moving in a fluid varies as

Question # 6

Substances that flow easily have

Question # 7

The instrument which detects the instant at which external pressure becomes equal to the systolic pressure is

Question # 8

The value for systolic blood pressure for a normal healthy person is

Question # 9

In a container having water filled up to a height h, a hole is made in the bottom. The velocity of water flowing out of the hole is

Question # 10

When each particle of the fluid moves along a smoth path, this path is known as

Question # 11

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 # 12

The irregular and unsteady flow of the fluid is called

Question # 13

Where the streamlines are very far apart from each other, the pressure will be

Question # 14

When the upward drag force of the fluid becomes equal to downward force of gravity of the droplet, then its velocity:

Question # 15

If water rises 4 cm in a long, thin tube because of capillary action, then, under corresponding conditions of use, the rise (in the tube) of a liquid whose density is 2 g/cm2will be

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 Surface tension of water is due to
A. Inter molecular attractions
B. Inter molecular spaces
C. Inter molecular repulsion
D. None of above
2 In case of streamed lined flow of liquid, the loss of energy is
A. Maximum
B. Minimum
C. Infinite
D. equal to what is in turbulent flow
3 The term Brownian movement refers to
A. irregular motions of small particles suspended in a fluid
B. convection currents in a liquid or gas
C. convection currents in a gas but not in a liquid
D. the stretching of a body beyond its elastic limit
4 Two copper balls of 1 cm and 2 cm in diameter are simultaneously dropped in the same viscous medium. The terminal velocity of bigger ball is:
A. Not affected due to its size
B. Twice that of small size ball
C. Four times that of small size ball
D. 1/4th of that of small size ball
5 During the steady flow, different streamlines
A. cannot across each other
B. can across each other
C. either of them
D. neither of them
6 Fire fighters have jet attached to the head of their water pipes in order to
A. Increase the mass of water flowing per second
B. Increase the velocity of water flowing out
C. Increase the volume of water flowing per second
D. Avoid wastage of water
7 Surface tension of water is reduced by adding
A. Detergents
B. Camphor
C. Plastic
D. Both A and B
8 The velocity gained by the fluid in falling through the distance (h1 - h2) under the action of gravity is equal to the speed of the action of gravity is equal to the speed of the
A. orifices
B. efflux
C. fluid
D. none of them
9 The density of blood is nearly equal to that of
A. mercury
B. sodium
C. water
D. honey
10 Substances that flow easily have
A. large coefficient of viscosity
B. small coefficient of viscosity
C. either of them
D. none of them

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