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

At high altitude the blood oozes out of the nose and ear because

Question # 2

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

Question # 3

Density of fluid is defined as:

Question # 4

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

Question # 5

The value of viscosity of a fluid is dependent on (at constant temperature)

Question # 6

The un-steady streamline flow is called

Question # 7

Substances that do not flow easily have

Question # 8

According to Stoke's law, drag force depends on

Question # 9

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

Question # 10

At low speeds, the drag force is

Question # 11

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

Question # 12

The smooth or steady streamline flow is known as

Question # 13

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 # 14

With increase of temperature, the viscosity of liquid and gases

Question # 15

Unit of viscosity is:

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 Ball pen functions on the principle of
A. Viscosity
B. Boyle's law
C. Gravitational force
D. Surface tnesion
2 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
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
A. water contains hydrogen atoms, air does not
B. water molecules are smaller than molecules in the air
C. water molecules are smaller than molecules in the air
D. surface tension of the water prevents it from
4 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
5 Unit of viscosity is:
A. Kg m-1sec-1
B. N s m-2
C. J s m-3
D. All of these
6 Surface tension of water is due to
A. Inter molecular attractions
B. Inter molecular spaces
C. Inter molecular repulsion
D. None of above
7 When the droplet moves with terminal velocity in a fluid, the net force acting on the droplet is:
A. FD-mg
B. Zero
C. mg-FD
D. None of these
8 Bernoulli's equation is based upon law of conversation of
A. mass
B. momentum
C. Energy
D. None
9 Above a certain velocity of a fluid is called
A. turbulent flow
B. steady flow
C. either of them
D. both of them
10 Fluids resist force, This property is called
A. Stiffness
B. Strength
C. Ductility
D. Elasticity

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