ECAT Pre Computer Science Chapter 6 MCQ Test With Answer

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

Fluids have three types of energies. The Bernoulli's equation combines those energies.which of the following is one of the three enrgies possessed by a fluid?

Question # 2

The resistance offered by a fluid to a solid moving inside it is called:

Question # 3

The unit of viscosity is SI system is:

Question # 4

Surface tension of water is reduced by adding

Question # 5

Blood has a density

Question # 6

The instrument which detects the instant at which external pressure becomes equal to the systolic pressure is

Question # 7

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

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 electrical forces between the molecules of a liquid are

Question # 10

Above a certain velocity of a fluid is called

Question # 11

During the free fall motion of an object, when its weight becomes equal to the drag force, then it will move with

Question # 12

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

Question # 13

Glycerin has viscosity _____ the viscosity of water:

Question # 14

In a normal healthy person the value of diastolic pressure is

Question # 15

During the steady flow, different streamlines

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 A tube is tapered from 20 cm diameter to 2 cm diameter, the velocity at the first cross-section is 50 cm/s, then the velocity at the second cross-section is
A. 50 m/s
B. 20 m/s
C. 40 cm/s
D. 5 cm/s
2 The velocity of falling raindrop attains limited value because of
A. Up trust of air
B. Viscous force exerted by air
C. Surface tension effect
D. Air currents atmosphere
3 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
4 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
5 The velocity gained by the fluid in falling through the distance (h1 - h2) under the action of gravity is equal to the speed of the action of gravity is equal to the speed of the
A. orifices
B. efflux
C. fluid
D. none of them
6 Where the streamlines are very close to each other, the pressure will be
A. low
B. zero
C. high
D. all of them
7 Pressure exerted by a gas on the walls of its container in due to
A. adhesion between the gas molecules and the container
B. cohesion between the gas molecules and the container
C. collision between the gas molecules and the container
D. surface tension of the gas
8 During the steady flow, different streamlines
A. cannot across each other
B. can across each other
C. either of them
D. neither of them
9 Fluids resist force, This property is called
A. Stiffness
B. Strength
C. Ductility
D. Elasticity
10 A fluid at a certain point has 50 J of potential energy per unit volume, 75 J of kinetic energy per unit volume,and 35 J of pressure energy per unit volume. the total energy of the fluid is
A. 125 J
B. 90 J
C. 160 J
D. 85 J

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