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

A body is moving through a viscous medium eventually comes to rest because of:

Question # 2

Machine parts are jammed due to:

Question # 3

During the free fall motion of an object, when its weight becomes equal to the drag force, then it will move with

Question # 4

When the different streamlines cannot cross each other, then this condition is known as

Question # 5

The rain drop falling from the sky reach the ground with

Question # 6

The law of conservation of energy gives us

Question # 7

A tube tapers from 20 cm diameter to 2 cm, the velocity at first cross-section is 50 ms-1then velocity at second cross-section is

Question # 8

Internal friction of fluid is called

Question # 9

The instrument which detects the instant at which external pressure becomes equal to the systolic pressure is

Question # 10

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:

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 drag force acting on a spherical droplet of radius 10-5m moving with a velocity of 1 cm/sec in a fluid of velocity 5.31 x 10-7m/sec. The units comes out to be:

Question # 13

Fluid A is more viscous than fluid B. While flowing through a pipe of the same dimensions and material which fluid takes longer to travel at 25°C?

Question # 14

The body passing a viscous medium affected by:

Question # 15

Bernoulli's equation is applicable for

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 Surface tension of water is due to
A. Inter molecular attractions
B. Inter molecular spaces
C. Inter molecular repulsion
D. None of above
2 What is another name for laminar flow?
A. streamline
B. unsteady flow
C. turbulent flow
D. both (a) and (b)
3 When the speed of a body in a fluid increases then the drag force
A. decreases
B. becomes zero
C. increases
D. non of them
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
A. 1/4 times
B. 4 times
C. Twice
D. 1/2 of 8 cm diameter pipe
5 An object moving through a fluid experiences a retarding force called a
A. frictional force
B. terminal force
C. opposing force
D. drag force
6 Above a certain velocity of a fluid is called
A. turbulent flow
B. steady flow
C. either of them
D. both of them
7 Deep water almost runs still when surface water flow in rivers. What does it explains
A. Magnus effect
B. Equation of continuity
C. Surface energy
D. Bernoulli's equation
8 At high speed, fluid friction _____ and fuel consumption ___,:
A. Increases, decreases
B. Increases, increases
C. Decreases, increases
D. None of these
9 Bernoulli's equation is important in the field of
A. Electrical circuit
B. Magnetism
C. Photoelectric effect
D. Flow of fluids
10 Blood pressure is measured in torr. Which of the following units could belong to torr?
A. N m-1
B. N m-2
C. N m
D. N-1m-2

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