ECAT Pre Engineering Physics Chapter 6 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 6 Fluid Dynamics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 6 Fluid Dynamics

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Physics ECAT Pre Engineering Chapter 6 Fluid Dynamics

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Question # 1

The terminal velocity of a small size spherical body of radius R moving in a fluid varies as

Question # 2

When the velocity of a liquid flowing steadily in a tube increases, its pressure?

Question # 3

The unit of viscosity is SI system is:

Question # 4

When the droplet moves with terminal velocity in a fluid, the net force acting on the droplet is:

Question # 5

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

Question # 6

High speed meteors rushing through air reduces to ashes because of:

Question # 7

With the increase of temperature viscosity

Question # 8

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

Question # 9

According to Stoke's law, drag force depends on

Question # 10

In a _____ flow, each particle of the fluid is called a streamline and different streamlines ______cross each other.

Question # 11

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 # 12

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 # 13

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

Question # 14

Bernoulli's equation is important in the field of

Question # 15

The pressure will change in the pipe, as the fluid moves through that pipe of varying

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 A body is moving through a viscous medium eventually comes to rest because of:
A. Force of gravity
B. Force of friction
C. Its weight
D. Both A and C
2 Fire fighters have a jet attached to the head of their water pipes in order to head of their water pipes in order to
A. Increase the mass of water flowing per second
B. Avoid wastage of water
C. Increase the velocity of water flowing out
D. Increase the volume of water flowing per second
3 The value for systolic blood pressure for a normal healthy person is
A. 140 torr
B. 80 torr
C. 90 torr
D. 120 torr
4 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
5 The body passing a viscous medium affected by:
A. One force only
B. Two forces only
C. Four forces
D. None of these
6 At high speed, fluid friction _____ and fuel consumption ___,:
A. Increases, decreases
B. Increases, increases
C. Decreases, increases
D. None of these
7 The fluid is incompressible, if itsdensity is
A. zero
B. constant
C. very high
D. very small
8 If one of the pipes has a much smaller diameter than the other and are placed horizontally then form both sides of Bernoulli's equation, we can drop the term
A. P
B. 1/2 fv2
C. pgh
D. none of them
9 The rain drop falling from the sky reach the ground with
A. Constant terminal velocity
B. Constant gravitational acceleration
C. Variable acceleration
D. acceleration greater than g
10 When a water droplet falling freely through air, the drag force on water droplet increases with th
A. decrease in speed
B. increase in speed
C. pressure
D. none of them

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