ECAT Pre Computer Science Chapter 6 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 6 Fluid Dynamics

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

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ECAT Physics Chapter 6 Fluid Dynamics

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Question # 1

At low speeds, the drag force is

Question # 2

The product of cross-sectional area of the pipe and the fluid speed at any pint along the pipe is

Question # 3

Fog droplets are suspended in air when their weight is balanced by:

Question # 4

The fluid is incompressible, if itsdensity is

Question # 5

The pressure will be low where the speed of the fluid is

Question # 6

A body is moving through a viscous medium eventually comes to rest because of:

Question # 7

In a normal healthy person the value of diastolic pressure is

Question # 8

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

Question # 9

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

Question # 10

Bernoulli's equation is important in the field of

Question # 11

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

Question # 12

High speed meteors rushing through air reduces to ashes because of:

Question # 13

0.10 cm can be written as:

Question # 14

The terminal velocity of water droplet of radius 1 x 10-4m and desity 1000 kg m-3descending through air of viscosity 19 x 10-6kg. m-1 s-1 is

Question # 15

Surface tension of water is reduced by adding

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 When the droplet moves with terminal velocity in a fluid, the net force acting on the droplet is:
A. FD-mg
B. Zero
C. mg-FD
D. None of these
2 During the steady flow, different streamlines
A. cannot across each other
B. can across each other
C. either of them
D. neither of them
3 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
4 The property of fluids due to which they resist their own flow is called:
A. Drag force
B. Surface tension
C. Viscosity
D. None of these
5 The analysis of fluid motion becomes simplified by using
A. law of conservation
B. law of conservation of energy
C. both of them
D. none of them
6 The un-steady streamline flow is called
A. laminar flow
B. turbulent flow
C. both of them
D. none of them
7 The terminal velocity of water droplet of radius 1 x 10-4m and desity 1000 kg m-3descending through air of viscosity 19 x 10-6kg. m-1 s-1 is
A. 2.5 ms-1
B. 3.2 ms-1
C. 4.3 ms-1
D. 1.1 ms-1
8 Density of fluid is defined as:
A. Its volume to mass ratio
B. Product of volume and mass
C. Its mass of volume ratio
D. None of these
9 The irregular and unsteady flow of the fluid is called
A. turbulent flow
B. steady flow
C. either of them
D. both of them
10 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

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