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

The resistance offered by a fluid to a solid moving inside it is called:

Question # 2

A water hose with an internal diameter of 20 mm at the outlet discharges 30 kg of water in 60 s. What is water speed at the outlet if density of water is 1000 kg/m3during its steady flow

Question # 3

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

Question # 4

Blood pressure is measured by the instrument

Question # 5

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

Question # 6

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

Question # 7

The electrical forces between the molecules of a liquid are

Question # 8

The velocity of falling raindrops attains limited value because of

Question # 9

The equation of continuity
A1V1= A2V2is for the flow of

Question # 10

According to Stoke's law, drag force depends on

Question # 11

The unit of viscosity is SI system is:

Question # 12

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

Question # 13

Bernoulli's equation is based upon law of conversation of

Question # 14

Which of the following has the greatest coefficient of viscosity?

Question # 15

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

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 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
A. Quadratic equation
B. Equation of discontinuity
C. Equation of continuity
D. None of the above
2 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
3 Fire fighters have jet attached to the head of their water pipes in order to
A. Increase the mass of water flowing per second
B. Increase the velocity of water flowing out
C. Increase the volume of water flowing per second
D. Avoid wastage of water
4 A body is floating in a liquid. The up thrust on the body is
A. Equal to weight of liquid displaced
B. Zero
C. Less than the weight of liquid displaced
D. Weight of body-weight of liquid displaced
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 In a normal healthy person the value of diastolic pressure is
A. 75 - 80 torr
B. 100 torr
C. 120 torr
D. none of them
7 When the speed of a body in a fluid increases then the drag force
A. decreases
B. becomes zero
C. increases
D. non of them
8 Which of the following options correctly states the equation of continuity for an ideal fluid?
A. A1A2= V1V2
B. A1/A2= V2/V1
C. A1/A2= V1/V2
D. none of the above
9 According to slok's law, drag force depends on
A. Radius of the spherical body
B. Terminal velocity of body
C. Coefficient of viscosity
D. All of above
10 Fluid friction is _____ the friction between two solid surfaces:
A. Greater than
B. Smaller than
C. Equal to
D. None of these

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