ECAT Pre General Science Chapter 6 online mcq test with answers for Physics chapter 6 (Fluid Dynamics)

Question # 1

Glycerin has viscosity _____ the viscosity of water:

More than A
Equal to B
Less than C
None of these D

Question # 2

The electrical forces between the molecules of a liquid are

Repulsive A
Attractive B
Both A and B C
None D

Question # 3

Blood pressure is measured in torr. Which of the following units could belong to torr?

N m^-1 A
N m^-2 B
N m C
N^-1m^-2 D

Question # 4

The equation of continuity is

A₁A_{2 = V}₁V₂ A
A_1/_V_{1 =}A_2/V₂ B
_V_1/A₁₌V_2/A₂ C
A₁_V_{1 =}A₂V₂ D

Question # 5

The rain drop falling from the sky reach the ground with

Constant terminal velocity A
Constant gravitational acceleration B
Variable acceleration C
acceleration greater than g D

Question # 6

Where the streamlines are very far apart from each other, the pressure will be

low A
zero B
high C
all of them D

Question # 7

Matter is made up of very tiny particles called

Atoms A
Molecules B
Ions C
None of these D

Question # 8

In a normal healthy person the value of diastolic pressure is

75 - 80 torr A
100 torr B
120 torr C
none of them D

Question # 9

The value for systolic blood pressure for a normal healthy person is

140 torr A
80 torr B
90 torr C
120 torr D

Question # 10

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

decreases A
becomes zero B
increases C
non of them D

Question # 11

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

Quadratic equation A
Equation of discontinuity B
Equation of continuity C
None of the above D

Question # 12

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

Drag force A
Surface tension B
Viscosity C
None of these D

Question # 13

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

Magnus effect A
Equation of continuity B
Surface energy C
Bernoulli's equation D

Question # 14

The un-steady streamline flow is called

laminar flow A
turbulent flow B
both of them C
none of them D

Question # 15

Fluid A is more viscous than fluid B. While flowing through a pipe of the same dimensions and material which fluid takes longer to travel at 25°C?

fluid B A
fluid A B
both take the same time C
not possible to determine from given information D

Question # 16

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

Starts increasing A
Starts decreasing B
Becomes constant C
Is called escape velocity D

Question # 17

Bernoulli's equation is important in the field of

Electrical circuit A
Magnetism B
Photoelectric effect C
Flow of fluids D

Question # 18

According to slok's law, drag force depends on

Radius of the spherical body A
Terminal velocity of body B
Coefficient of viscosity C
All of above D

Question # 19

Blood pressure is measured by the instrument

stethoscope A
sphygmomanometer B
barometer C
none of them D

Question # 20

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^-1s^-1is

2.5 ms^-1 A
3.2 ms^-1 B
4.3 ms^-1 C
1.1 ms^-1 D

Question # 21

How much force is required to slide one layer of the liquid over the other layer is measured by

friction A
density B
viscosity C
resistivity D

Question # 22

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

Force of gravity A
High resistance of air B
Drag force C
None of these D

Question # 23

The application of Bernoulli's equation is

Torricelli's theorem A
Venture relation B
Binomial theorem C
Both a and b D

Question # 24

At high speed, fluid friction ___ and fuel consumption _,:

Increases, decreases A
Increases, increases B
Decreases, increases C
None of these D

Question # 25

The equation of continuity
A₁V₁= A₂V₂is for the flow of

an ideal fluid A
an incompressible fluid B
a non visconcous fluid C
all of the above D

Question # 26

Fluid friction is _____ the friction between two solid surfaces:

Greater than A
Smaller than B
Equal to C
None of these D

Question # 27

Fire fighters have jet attached to the head of their water pipes in order to

Increase the mass of water flowing per second A
Increase the velocity of water flowing out B
Increase the volume of water flowing per second C
Avoid wastage of water D

Question # 28

The SI unit of viscosity is

kg m^-1s^-1 A
kg ms^-1 B
kg m^-1s^-2 C
kg m^-1s D

Question # 29

In a _ flow, each particle of the fluid is called a streamline and different streamlines __cross each other.

Streamline, cannot A
Turbulent, cannot B
Streamline, can C
None of these D

Question # 30

The law of conservation of mass gives us the

equation of continuity A
Bernoulli's theorem B
both of them C
none of them D

Sr.#	Question	Answer
1	The term Brownian movement refers to	A. irregular motions of small particles suspended in a fluid B. convection currents in a liquid or gas C. convection currents in a gas but not in a liquid D. the stretching of a body beyond its elastic limit
2	The body passing a viscous medium affected by:	A. One force only B. Two forces only C. Four forces D. None of these
3	The law of conservation of energy gives us	A. equation of continuity B. Bernoulli's theorem C. both of them D. none of them
4	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
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	The rain drop falling from the sky reach the ground with	A. Constant terminal velocity B. Constant gravitational acceleration C. Variable acceleration D. acceleration greater than g
7	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
8	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
9	At high speed, fluid friction _____ and fuel consumption ___,:	A. Increases, decreases B. Increases, increases C. Decreases, increases D. None of these
10	Blood has a density	A. Equal to water B. Greater then water C. Lesser then water D. None of these

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ECAT Pre General Science Physics Chapter 6 MCQ Test With Answer

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

ECAT Pre General Science Physics Chapter 6 Fluid Dynamics

Glycerin has viscosity _____ the viscosity of water:

The electrical forces between the molecules of a liquid are

Blood pressure is measured in torr. Which of the following units could belong to torr?

The equation of continuity is

The rain drop falling from the sky reach the ground with

Where the streamlines are very far apart from each other, the pressure will be

Matter is made up of very tiny particles called

In a normal healthy person the value of diastolic pressure is

The value for systolic blood pressure for a normal healthy person is

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

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

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

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

The un-steady streamline flow is called

Fluid A is more viscous than fluid B. While flowing through a pipe of the same dimensions and material which fluid takes longer to travel at 25°C?

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

Bernoulli's equation is important in the field of

According to slok's law, drag force depends on

Blood pressure is measured by the instrument

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

How much force is required to slide one layer of the liquid over the other layer is measured by

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

The application of Bernoulli's equation is

At high speed, fluid friction _____ and fuel consumption ___,:

The equation of continuityA1V1= A2V2is for the flow of

Fluid friction is _____ the friction between two solid surfaces:

Fire fighters have jet attached to the head of their water pipes in order to

The SI unit of viscosity is

In a _____ flow, each particle of the fluid is called a streamline and different streamlines ______cross each other.

The law of conservation of mass gives us the

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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^-1s^-1is

At high speed, fluid friction ___ and fuel consumption _,:

The equation of continuity
A₁V₁= A₂V₂is for the flow of

In a _ flow, each particle of the fluid is called a streamline and different streamlines __cross each other.