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

At low speeds, the drag force is

Question # 2

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

Question # 3

An object moving through a fluid experiences a retarding force called a

Question # 4

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

Question # 5

A person standing near the track of a fast moving train has tendency to fall towards it because of

Question # 6

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

Question # 7

Stock's law holds for:

Question # 8

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 # 9

The unit of viscosity is SI system is:

Question # 10

A high concentration of red blood cells increases its viscosity from

Question # 11

Surface tension of water is reduced by adding

Question # 12

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

Question # 13

The electrical forces between the molecules of a liquid are

Question # 14

Bernoulli's equation is based upon law of conversation of

Question # 15

With increase of temperature, the viscosity of liquid and gases

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 In case of streamed lined flow of liquid, the loss of energy is
A. Maximum
B. Minimum
C. Infinite
D. equal to what is in turbulent flow
2 During the steady flow, different streamlines
A. cannot across each other
B. can across each other
C. either of them
D. neither of them
3 Terminal velocity is the maximum velocity attained by a spherical droplet when the drag force______the weight of droplet:
A. Is smaller than
B. Is greater than
C. Becomes equal to
D. None of these
4 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
5 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
6 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
7 Blood is an
A. Compressible fluid
B. incompressible fluid
C. hard
D. none of them
8 When a water droplet falls through air, the net force on it is
A. Net force = drag force - weight
B. Net force = weight - drag force
C. Net force = drag force + weight
D. Net force = weight + drag force
9 N s m-2is unit of:
A. Drag force
B. Pressure
C. Surface tension
D. Coefficient of viscosity
10 The property of fluids due to which they resist their own flow is called:
A. Drag force
B. Surface tension
C. Viscosity
D. None of these

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