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

Bernoulli's equation is based upon law of conversation of

Question # 2

Blood has a density

Question # 3

The electrical forces between the molecules of a liquid are

Question # 4

Surface tension of water is due to

Question # 5

Which of the following options states the names of fluids in the order of increasing viscosity?

Question # 6

Pressure exerted by a gas on the walls of its container in due to

Question # 7

According to the Bernoulli's theorem the pressure velocity are

Question # 8

When the different streamlines cannot cross each other, then this condition is known as

Question # 9

Substances that do not flow easily have

Question # 10

The velocity of falling raindrops attains limited value because of

Question # 11

The property of fluids due to which they resist their own flow is called:

Question # 12

Stock's law holds for:

Question # 13

With the increase of temperature viscosity

Question # 14

The equation of continuity
A1V1= A2V2is for the flow of

Question # 15

The SI unit of viscosity is

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 Machine parts are jammed due to:
A. Increasing in viscosity of lubricant
B. Decreasing in viscosity of lubricant
C. Decreasing in surface tension of lubricant
D. None of these
2 Terminal velocity is the maximum velocity attained by a spherical droplet when the drag force______the weight of droplet:
A. Is smaller than
B. Is greater than
C. Becomes equal to
D. None of these
3 Above a certain velocity of a fluid is called
A. turbulent flow
B. steady flow
C. either of them
D. both of them
4 The effect of friction between different layers of a flowing fluid is described in terms of
A. motion of fluid
B. nature of fluid
C. colour of fluid
D. viscosity of fluid
5 Viscosity of water is ______ that of air but ___ that of plasma.
A. More, more
B. Less, more
C. Less, less
D. More, less
6 The velocity of falling raindrop attains limited value because of
A. Up trust of air
B. Viscous force exerted by air
C. Surface tension effect
D. Air currents atmosphere
7 According to Stoke's law, drag force depends on
A. Initial velocity
B. Final velocity
C. Terminal velocity
D. Instantaneous velocity
8 The product of cross-sectional area of the pipe and the fluid speed at any pint along the pipe is
A. very high
B. very low
C. constant
D. zero
9 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
10 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
A. 5000 cms-1
B. 500 cms-1
C. 50 cms-1
D. 0.5 cm/s

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