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

Bernoulli's equation is applicable for

Question # 2

Which of the following options states the names of fluids in the order of increasing viscosity?

Question # 3

Liquids and gasses have

Question # 4

Bernoulli's equation is based upon law of conversation

Question # 5

The law of conservation of energy gives us

Question # 6

Matter is made up of very tiny particles called

Question # 7

The property of fluids due to which they resist their own flow is called:

Question # 8

What are the SI base units of the coefficient of viscosity

Question # 9

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 # 10

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

Question # 11

In case of streamed lined flow of liquid, the loss of energy is

Question # 12

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

Question # 13

Above a certain velocity of a fluid is called

Question # 14

With increase of temperature, the viscosity of liquid and gases

Question # 15

At high speed, fluid friction _____ and fuel consumption ___,:

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 A flowing liquid possess
A. K.E
B. P.E
C. Pressure Energy
D. All
2 According to the equation of continuity, when water falls from the tap, it's speed increases and its cross-sectional area
A. decreases
B. increases
C. becomes zero
D. none of them
3 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
4 Bernoulli's equation is applicable for
A. turbulent flow
B. streamline flow
C. both (a) and (b)
D. all kinds of flows
5 The velocity of falling raindrops attains limited value because of
A. Up thrust of air
B. Air currents of the earth atmosphere
C. Surface tension effect
D. Viscous force exerted by air
6 Glycerin has viscosity _____ the viscosity of water:
A. More than
B. Equal to
C. Less than
D. None of these
7 When the upward drag force of the fluid becomes equal to downward force of gravity of the droplet, then its velocity:
A. Starts increasing
B. Starts decreasing
C. Becomes constant
D. Is called escape velocity
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
A. 50 m/s
B. 20 m/s
C. 40 cm/s
D. 5 cm/s
9 When a water droplet falls through air, the net force on it is
A. Net force = drag force - weight
B. Net force = weight - drag force
C. Net force = drag force + weight
D. Net force = weight + drag force
10 Internal friction of fluid is called
A. Surface tension
B. Viscosity
C. Resistance
D. Cohesive force

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