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

The equation of continuity
A1V1= A2V2is for the flow of

Question # 2

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

Question # 3

0.10 cm can be written as:

Question # 4

Two water pipes of diameters 4 cm and 8 cm are connected with a supply line. The velocity of flow of water in the pipe 4 cm diameter is

Question # 5

The law of conservation of energy gives us

Question # 6

Viscosity of water is ______ that of air but ___ that of plasma.

Question # 7

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

Question # 8

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

Question # 9

When the velocity of a liquid flowing steadily in a tube increases, its pressure?

Question # 10

According to slok's law, drag force depends on

Question # 11

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 # 12

The term Brownian movement refers to

Question # 13

The force exerted by the fluid in a hydraulic pump on the piston is 10 cm2, the fluid pressure on the piston is, in N/cm2

Question # 14

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

Question # 15

Blood vessels can be stretch like rubber, therefore they are

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 At the starting point of the free fall motion of an object, its acceleration will be
A. maximum
B. minimum
C. zero
D. none of them
2 Two copper balls of 1 cm and 2 cm in diameter are simultaneously dropped in the same viscous medium. The terminal velocity of bigger ball is:
A. Not affected due to its size
B. Twice that of small size ball
C. Four times that of small size ball
D. 1/4th of that of small size ball
3 Blood has a density
A. Equal to water
B. Greater then water
C. Lesser then water
D. None of these
4 Above a certain velocity of a fluid is called
A. turbulent flow
B. steady flow
C. either of them
D. both of them
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 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
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 What are the SI base units of the coefficient of viscosity
A. Kg m s-2
B. kgm2 s-2
C. Kg m s-1
D. kg m-1s-1
9 Machine parts are jammed due to:
A. Increasing in viscosity of lubricant
B. Decreasing in viscosity of lubricant
C. Decreasing in surface tension of lubricant
D. None of these
10 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

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