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

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

Question # 2

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

Question # 3

Bernoulli's equation is based upon law of conversation of

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

Drag force increases if speed of the object moving through the fluid:

Question # 8

The term Brownian movement refers to

Question # 9

Unit of viscosity is:

Question # 10

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

Question # 11

When a water droplet falling freely through air, the drag force on water droplet increases with th

Question # 12

A person standing near the track of a fast moving train has tendency to fall towards it because of

Question # 13

During the steady flow, different streamlines

Question # 14

Viscosity is defined as

Question # 15

The un-steady streamline flow is called

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 Fluid friction is _____ the friction between two solid surfaces:
A. Greater than
B. Smaller than
C. Equal to
D. None of these
2 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
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
A. 2.5 ms-1
B. 3.2 ms-1
C. 4.3 ms-1
D. 1.1 ms-1
4 The analysis of fluid motion becomes simplified by using
A. law of conservation
B. law of conservation of energy
C. both of them
D. none of them
5 If the flow is incompressible and the flow is steady then the mass of the fluid through the pipe
A. increases
B. decreases
C. becomes zero
D. is conserved
6 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:
A. 10-16N
B. 10-14N
C. 10-12N
D. 10-10N
7 If every particle of the flow that passes a particular point, moves along the same path as followed by particles which passed the point earlier, then this flow is said to be
A. turbulent
B. streamline
C. abrupt
D. none of them
8 The equation of continuity
A1V1= A2V2is for the flow of
A. an ideal fluid
B. an incompressible fluid
C. a non visconcous fluid
D. all of the above
9 Drag force increases if speed of the object moving through the fluid:
A. Increases
B. Decreases
C. Remains constant
D. None of these
10 The SI unit of viscosity is
A. kg m-1s-1
B. kg ms-1
C. kg m-1s-2
D. kg m-1s

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