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

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 # 2

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

Question # 3

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

Question # 4

A fluid at a certain point has 50 J of potential energy per unit volume, 75 J of kinetic energy per unit volume,and 35 J of pressure energy per unit volume. the total energy of the fluid is

Question # 5

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

Question # 6

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

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

When the velocity of a liquid flowing steadily in a tube increases, its pressure?

Question # 9

The smooth or steady streamline flow is known as

Question # 10

The SI unit of viscosity is

Question # 11

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

Question # 12

A high concentration of red blood cells increases its viscosity from

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

The fluid which is incompressible and non viscous is called

Question # 17

Above a certain velocity of a fluid is called

Question # 18

The rain drop falling from the sky reach the ground with

Question # 19

0.10 cm can be written as:

Question # 20

Ball pen functions on the principle of

Question # 21

Bernoulli's equation is based upon law of conservation

Question # 22

In deriving the Bernoulli's equation, we assume that the fluid is

Question # 23

Internal friction of fluid is called

Question # 24

Density of fluid is defined as:

Question # 25

What are the SI base units of the coefficient of viscosity

Question # 26

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

Question # 27

One torr is equal to

Question # 28

Viscosity is defined as

Question # 29

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

Question # 30

The velocity of falling raindrop attains limited value because of

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 The smooth or steady stream-line flow is know as
A. Laminar flow
B. Turbulent flow
C. Both a and b
D. None of the above
2 In a normal healthy person the value of systolic pressure is
A. 75 torr
B. 80 torr
C. 120 torr
D. all of them
3 Stock's law holds for:
A. Motion through free space
B. Motion through viscous medium
C. Bodies of all shapes
D. None of these
4 Viscosity is defined as
A. the friction between fluid and its container's walls
B. the internal friction between two layers of fluid
C. the resistance to flow a fluid experiences
D. the extent to which outside factors effect the fluid's flow
5 A high concentration of red blood cells increases its viscosity from
A. 3 - 5 times that of mercury
B. 5 - 8 times that of mercury
C. 3 - 5 times that of water
D. 5 - 8 times that of water
6 Fire fighters have a jet attached to the head of their water pipes in order to head of their water pipes in order to
A. Increase the mass of water flowing per second
B. Avoid wastage of water
C. Increase the velocity of water flowing out
D. Increase the volume of water flowing per second
7 Bernoulli's equation is based upon law of conversation of
A. mass
B. momentum
C. Energy
D. None
8 Blood vessels can be stretch like rubber, therefore they are
A. rigid
B. hard
C. very thick
D. not rigid
9 The maximum drag force on a falling sphere is 9.8 N, it weight is
A. 1 N
B. 9.8 N
C. 4.9 N
D. Cannot be calculated
10 In deriving the Bernoulli's equation, we assume that the fluid is
A. incompressible
B. no viscous
C. flows in a steady manner
D. all of them

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