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

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

Question # 2

In Bernoulli's theorem the relation between velocity and pressure is

Question # 3

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

Question # 4

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 # 5

Blood pressure is measured by the instrument

Question # 6

A device used to measure the speed of liquid flow is known as

Question # 7

According to the equation of continuity, when water falls from the tap, it's speed increases and its cross-sectional area

Question # 8

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

Question # 9

According to slok's law, drag force depends on

Question # 10

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

Question # 11

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

Question # 12

The effect of friction between different layers of a flowing fluid is described in terms of

Question # 13

The smooth or steady streamline flow is known as

Question # 14

The velocity of falling raindrop attains limited value because of

Question # 15

Blood pressure is measured in torr. Which of the following units could belong to torr?

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
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?
A. potential energy
B. pressure energy
C. strain energy
D. (a) and (b) only
2 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
3 Fluids resist force, This property is called
A. Stiffness
B. Strength
C. Ductility
D. Elasticity
4 The equation of continuity
A1V1= A2V2is for the flow of
A. an ideal fluid
B. an incompressible fluid
C. a non visconcous fluid
D. all of the above
5 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
6 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
7 Liquids and gasses have
A. zero viscosity
B. non-zero viscosity
C. very large viscosity
D. very small viscosity
8 The smooth or steady streamline flow is known as
A. laminar flow
B. turbulent flow
C. both of them
D. none of them
9 A high concentration of red blood cells increases its viscosity from
A. 3 - 5 times that of mercury
B. 5 - 8 times that of mercury
C. 3 - 5 times that of water
D. 5 - 8 times that of water
10 The body passing a viscous medium affected by:
A. One force only
B. Two forces only
C. Four forces
D. None of these

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