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

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 # 2

Which of the following has the greatest coefficient of viscosity?

Question # 3

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

Question # 4

During the free fall motion of an object, when its weight becomes equal to the drag force, then it will move with

Question # 5

Fluids have three types of energies. The Bernoulli's equation combines those energies.which of the following is one of the three enrgies possessed by a fluid?

Question # 6

The law of conservation of mass gives us the

Question # 7

Blood has a density

Question # 8

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

Question # 9

The mass of fluid passing through any cross-section per unit time is called

Question # 10

What is another name for laminar flow?

Question # 11

A massive object falls through a fluid:

Question # 12

Bernoulli's equation is important in the field of

Question # 13

A container has a small hole in the bottom. Air can go through this hole,but water cannot. This can be best explained by the statement that

Question # 14

The un-steady streamline flow is called

Question # 15

Stock's law holds for:

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 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
2 A tube is tapered from 20 cm diameter to 2 cm diameter, the velocity at the first cross-section is 50 cm/s, then the velocity at the second cross-section is
A. 50 m/s
B. 20 m/s
C. 40 cm/s
D. 5 cm/s
3 Bernoulli's equation is based upon law of conversation of
A. mass
B. momentum
C. Energy
D. None
4 The pressure will change in the pipe, as the fluid moves through that pipe of varying
A. cross-section
B. height
C. none of them
D. both of them
5 The electrical forces between the molecules of a liquid are
A. Repulsive
B. Attractive
C. Both A and B
D. None
6 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
7 What are the SI base units of the coefficient of viscosity
A. Kg m s-2
B. kgm2 s-2
C. Kg m s-1
D. kg m-1s-1
8 The fluid is incompressible, if itsdensity is
A. zero
B. constant
C. very high
D. very small
9 Stock's law holds for:
A. Motion through free space
B. Motion through viscous medium
C. Bodies of all shapes
D. None of these
10 High speed meteors rushing through air reduces to ashes because of:
A. Force of gravity
B. High resistance of air
C. Drag force
D. None of these

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