ECAT Pre Engineering Physics Chapter 6 MCQ Test With Answer

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

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

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Physics ECAT Pre Engineering Chapter 6 Fluid Dynamics

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Question # 1

A device used to measure the speed of liquid flow is known as

Question # 2

Stoke;s law is not applicable when the speed of the object moving through a fluid is:

Question # 3

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 # 4

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

Question # 5

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

Question # 6

The unit of viscosity is SI system is:

Question # 7

What is another name for laminar flow?

Question # 8

Stock's law holds for:

Question # 9

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 # 10

The electrical forces between the molecules of a liquid are

Question # 11

When a water droplet falls through air, the net force on it is

Question # 12

The effect of friction between different layers of a flowing fluid is described in terms of

Question # 13

According to Stoke's law, drag force depends on

Question # 14

The law of conservation of energy gives us

Question # 15

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

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 The pressure will be low where the speed of the fluid is
A. Zero
B. High
C. Low
D. Constant
2 Above a certain velocity of a fluid is called
A. turbulent flow
B. steady flow
C. either of them
D. both of them
3 With increase of temperature, the viscosity of liquid and gases
A. Increases for both
B. Decreases for both
C. Increases for liquids and decreases for gases
D. Decreases for liquids and increases for gases
4 In case of streamed lined flow of liquid, the loss of energy is
A. Maximum
B. Minimum
C. Infinite
D. equal to what is in turbulent flow
5 The property of fluids due to which they resist their own flow is called:
A. Drag force
B. Surface tension
C. Viscosity
D. None of these
6 The density of water is 103kg/m3. The water pressure on a submarine is 2.0 x 107N/m2. The depth of the submarine below the surface of the water, in maters, is approximately
A. 200 m
B. 11000 m
C. 2000 m
D. 8000 m
7 When a fluid is in motion, its flow can be considered as
A. turbulent
B. streamline
C. either or them
D. neither of them
8 Where the streamlines are very far apart from each other, the pressure will be
A. low
B. zero
C. high
D. all of them
9 Substances that do not flow easily have
A. large coefficient of viscosity
B. small coefficient of viscosity
C. either of them
D. none of them
10 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
A. 1.3 m/s
B. 1.6 m/s
C. 1.9 m/s
D. 2.2 m/s

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