ECAT Pre General Science Physics Chapter 6 MCQ Test With Answer

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

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

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ECAT Pre General Science Physics Chapter 6 Fluid Dynamics

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Question # 1

The smooth or steady streamline flow is known as

Question # 2

At low speeds, the drag force is

Question # 3

When the speed of a body in a fluid increases then the drag force

Question # 4

N s m-2is unit of:

Question # 5

The study of fluid in motion basically involves law of conservation of:

Question # 6

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

Question # 7

In the case of an incompressible fluid in stead flow the net rate of flow of mass entering one end of the tube of flow is equal to the net rate of flow of mass leaving the other end. This equation is called

Question # 8

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

Question # 9

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 # 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

Question # 11

Deep water almost runs still when surface water flow in rivers. What does it explains

Question # 12

Bernoulli's equation is applicable for

Question # 13

Fluid friction is _____ the friction between two solid surfaces:

Question # 14

The body will move with terminal velocity when it acquires

Question # 15

Under normal circumstances, the volume of blood is sufficient to keep the vessels

Question # 16

In Bernoulli's theorem the relation between velocity and pressure is

Question # 17

When a water droplet falling freely through air, the drag force on water droplet increases with th

Question # 18

When weight of an object falling freely becomes equal to the drag force, then the body will move with

Question # 19

The dimensions of viscosity are:

Question # 20

The maximum drag force on a falling sphere is 9.8 N, it weight is

Question # 21

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

Question # 22

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

Question # 23

At high altitude the blood oozes out of the nose and ear because

Question # 24

One torr is equal to

Question # 25

0.10 cm can be written as:

Question # 26

Surface tension of water is due to

Question # 27

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

Question # 28

If v is the velocity of flow of liquid through a tube of area of cross-section A, then according to equation of continuity

Question # 29

What are the SI base units of the coefficient of viscosity

Question # 30

Fluids resist force, This property is called

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Sr.# Question Answer
1 The electrical forces between the molecules of a liquid are
A. Repulsive
B. Attractive
C. Both A and B
D. None
2 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
3 With the increase of temperature viscosity
A. Increase
B. Decrease
C. Remains same
D. Doubles
4 When the different streamlines cannot cross each other, then this condition is known as
A. continuity condition
B. turbulent flow condition
C. steady flow condition
D. none of them
5 In a _____ flow, each particle of the fluid is called a streamline and different streamlines ______cross each other.
A. Streamline, cannot
B. Turbulent, cannot
C. Streamline, can
D. None of these
6 Liquids and gasses have
A. zero viscosity
B. non-zero viscosity
C. very large viscosity
D. very small viscosity
7 If one of the pipes has a much smaller diameter than the other and are placed horizontally then form both sides of Bernoulli's equation, we can drop the term
A. P
B. 1/2 fv2
C. pgh
D. none of them
8 Bernoulli's equation is important in the field of
A. Electrical circuit
B. Magnetism
C. Photoelectric effect
D. Flow of fluids
9 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
10 The equation of continuity is
A. A1A2 = V1V2
B. A1/V1 =A2/V2
C. V1/A1=V2/A2
D. A1V1 =A2V2

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