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

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

Question # 2

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 # 3

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 # 4

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 # 5

Fluid friction is _____ the friction between two solid surfaces:

Question # 6

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

Question # 7

Substances that flow easily have

Question # 8

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 # 9

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

Question # 10

According to the equation of continuity, when water falls from the tap, it's speed increases and its cross-sectional area

Question # 11

Viscosity is defined as

Question # 12

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 # 13

What are the SI base units of the coefficient of viscosity

Question # 14

In a normal healthy person the value of diastolic pressure is

Question # 15

Fluids resist force, This property is called

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 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
2 A body is moving through a viscous medium eventually comes to rest because of:
A. Force of gravity
B. Force of friction
C. Its weight
D. Both A and C
3 At low speeds, the drag force is
A. proportional to speed
B. inversely proportional to speed
C. not simply proportional to speed
D. none of them
4 Terminal velocity is the maximum velocity attained by a spherical droplet when the drag force______the weight of droplet:
A. Is smaller than
B. Is greater than
C. Becomes equal to
D. None of these
5 The fluid which is incompressible and non viscous is called
A. Ideal fluid
B. Non-ideal fluid
C. Prefect fluid
D. All
6 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
7 The equation of continuity
A1V1= A2V2is for the flow of
A. an ideal fluid
B. an incompressible fluid
C. a non visconcous fluid
D. all of the above
8 N s m-2is unit of:
A. Drag force
B. Pressure
C. Surface tension
D. Coefficient of viscosity
9 The smooth or steady streamline flow is known as
A. laminar flow
B. turbulent flow
C. both of them
D. none of them
10 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

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