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

Matter is made up of very tiny particles called

Question # 2

A massive object falls through a fluid:

Question # 3

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

Question # 4

The internal pressure of the blood is

Question # 5

Pressure exerted by a gas on the walls of its container in due to

Question # 6

At low speeds, the drag force is

Question # 7

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

Question # 8

Surface tension of water is reduced by adding

Question # 9

Which of the following has the greatest coefficient of viscosity?

Question # 10

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

Question # 11

Blood has a density

Question # 12

During the steady flow, different streamlines

Question # 13

The rain drop falling from the sky reach the ground with

Question # 14

The pressure will be low where the speed of the fluid is

Question # 15

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

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 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
2 If v is the velocity of flow of liquid through a tube of area of cross-section A, then according to equation of continuity
A. v/A = constant
B. A/v = constant
C. Av = constant
D. None
3 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
4 A body is floating in a liquid. The up thrust on the body is
A. Equal to weight of liquid displaced
B. Zero
C. Less than the weight of liquid displaced
D. Weight of body-weight of liquid displaced
5 Density of fluid is defined as:
A. Its volume to mass ratio
B. Product of volume and mass
C. Its mass of volume ratio
D. None of these
6 At high altitude the blood oozes out of the nose and ear because
A. The blood pressure increase at high altitudes
B. The percentage of oxygen in the air increase
C. The atmospheric pressure decrease there
D. The density of blood decrease at high altitudes
7 Viscosity is defined as
A. the friction between fluid and its container's walls
B. the internal friction between two layers of fluid
C. the resistance to flow a fluid experiences
D. the extent to which outside factors effect the fluid's flow
8 When weight of an object falling freely becomes equal to the drag force, then the body will move with
A. increasing speed
B. decreasing speed
C. constant speed
D. none of them
9 The smooth or steady streamline flow is known as
A. laminar flow
B. turbulent flow
C. both of them
D. none of them
10 At high speed, fluid friction _____ and fuel consumption ___,:
A. Increases, decreases
B. Increases, increases
C. Decreases, increases
D. None of these

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