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

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

Question # 2

Matter is made up of very tiny particles called

Question # 3

The mass of fluid passing through any cross-section per unit time is called

Question # 4

In case of streamed lined flow of liquid, the loss of energy is

Question # 5

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

Question # 6

What is another name for laminar flow?

Question # 7

Viscosity of water is ______ that of air but ___ that of plasma.

Question # 8

When a water droplet falls through air, the net force on it is

Question # 9

According to slok's law, drag force depends on

Question # 10

N s m-2is unit of:

Question # 11

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

Question # 12

Machine parts are jammed due to:

Question # 13

Above a certain velocity of a fluid is called

Question # 14

Ball pen functions on the principle of

Question # 15

The body passing a viscous medium affected by:

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 The un-steady streamline flow is called
A. laminar flow
B. turbulent flow
C. both of them
D. none of them
2 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
3 Machine parts are jammed due to:
A. Increasing in viscosity of lubricant
B. Decreasing in viscosity of lubricant
C. Decreasing in surface tension of lubricant
D. None of these
4 When the different streamlines cannot cross each other, then this condition is known as
A. continuity condition
B. turbulent flow condition
C. steady flow condition
D. none of them
5 How much force is required to slide one layer of the liquid over the other layer is measured by
A. friction
B. density
C. viscosity
D. resistivity
6 With increase of temperature, the viscosity of liquid and gases
A. Increases for both
B. Decreases for both
C. Increases for liquids and decreases for gases
D. Decreases for liquids and increases for gases
7 In a normal healthy person the value of diastolic pressure is
A. 75 - 80 torr
B. 100 torr
C. 120 torr
D. none of them
8 What are the SI base units of the coefficient of viscosity
A. Kg m s-2
B. kgm2 s-2
C. Kg m s-1
D. kg m-1s-1
9 In the case of an incompressible fluid in stead flow the net rate of flow of mass entering one end of the tube of flow is equal to the net rate of flow of mass leaving the other end. This equation is called
A. Quadratic equation
B. Equation of discontinuity
C. Equation of continuity
D. None of the above
10 The product of cross-sectional area of the pipe and the fluid speed at any pint along the pipe is
A. very high
B. very low
C. constant
D. zero

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