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

N s m-2is unit of:

Question # 2

The SI unit of viscosity is

Question # 3

When a fluid is in motion, its flow can be considered as

Question # 4

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

Question # 5

When there is no internal frictional forces between the adjacent layers of fluid, then the fluid is called

Question # 6

With increase of temperature, the viscosity of liquid and gases

Question # 7

The blood pressure of a person

Question # 8

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

Question # 9

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

Question # 10

A flowing liquid possess

Question # 11

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

Question # 12

Unit of viscosity is:

Question # 13

When each particle of the fluid moves along a smoth path, this path is known as

Question # 14

The electrical forces between the molecules of a liquid are

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 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
2 A container has a small hole in the bottom. Air can go through this hole,but water cannot. This can be best explained by the statement that
A. water contains hydrogen atoms, air does not
B. water molecules are smaller than molecules in the air
C. water molecules are smaller than molecules in the air
D. surface tension of the water prevents it from
3 Fog droplets are suspended in air when their weight is balanced by:
A. Force of gravity
B. Upward trust due to air
C. Surface tension
D. None of these
4 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?
A. fluid B
B. fluid A
C. both take the same time
D. not possible to determine from given information
5 The maximum drag force on a falling sphere is 9.8 N, it weight is
A. 1 N
B. 9.8 N
C. 4.9 N
D. Cannot be calculated
6 Which of the following has the greatest coefficient of viscosity?
A. water
B. gasoline
C. honey
D. tar
7 The smooth or steady streamline flow is known as
A. laminar flow
B. turbulent flow
C. both of them
D. none of them
8 In deriving the Bernoulli's equation, we assume that the fluid is
A. incompressible
B. no viscous
C. flows in a steady manner
D. all of them
9 When there is no internal frictional forces between the adjacent layers of fluid, then the fluid is called
A. incompressible
B. compressible
C. viscous
D. non viscous
10 Surface tension of water is due to
A. Inter molecular attractions
B. Inter molecular spaces
C. Inter molecular repulsion
D. None of above

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