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

With the increase of temperature viscosity

Question # 2

With increase of temperature, the viscosity of liquid and gases

Question # 3

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

Question # 4

Fluid friction is _____ the friction between two solid surfaces:

Question # 5

In deriving the Bernoulli's equation, we assume that the fluid is

Question # 6

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

Question # 7

At the starting point of the free fall motion of an object, its acceleration will be

Question # 8

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

Question # 9

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

Question # 10

At low speeds, the drag force is

Question # 11

Fog droplets are suspended in air when their weight is balanced by:

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

In a surface tension experiment with a capillary tube water rises up to 0.1 m. if the same experiment is repeated on an artificial satellite, which is resolving around the earth, water will rise in the capillary tube up to a height of

Question # 14

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 # 15

Surface tension of water is due to

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 According to the Bernoulli's theorem the pressure velocity are
A. equal to each other
B. proportional to each other
C. inversely proportional to each other
D. none of them
2 Where the streamlines are very far apart from each other, the pressure will be
A. low
B. zero
C. high
D. all of them
3 Pressure exerted by a gas on the walls of its container in due to
A. adhesion between the gas molecules and the container
B. cohesion between the gas molecules and the container
C. collision between the gas molecules and the container
D. surface tension of the gas
4 The mass of fluid passing through any cross-section per unit time is called
A. electric flux
B. magnetic flux
C. mass flux
D. none of them
5 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
6 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
7 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
8 The fluid is incompressible, if itsdensity is
A. zero
B. constant
C. very high
D. very small
9 Fire fighters have jet attached to the head of their water pipes in order to
A. Increase the mass of water flowing per second
B. Increase the velocity of water flowing out
C. Increase the volume of water flowing per second
D. Avoid wastage of water
10 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

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