ECAT Pre Computer Science Chapter 6 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 6 Fluid Dynamics

Try The 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

According to the Bernoulli's theorem the pressure velocity are

Question # 2

According to slok's law, drag force depends on

Question # 3

How much force is required to slide one layer of the liquid over the other layer is measured by

Question # 4

Which of the following options states the names of fluids in the order of increasing viscosity?

Question # 5

Bernoulli's equation is important in the field of

Question # 6

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

Question # 7

The term Brownian movement refers to

Question # 8

The dimensions of viscosity are:

Question # 9

A high concentration of red blood cells increases its viscosity from

Question # 10

Where the streamlines are very close to each other, the pressure will be

Question # 11

The equation of continuity
A1V1= A2V2is for the flow of

Question # 12

Two water pipes of diameters 4 cm and 8 cm are connected with a supply line. The velocity of flow of water in the pipe 4 cm diameter is

Question # 13

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

Question # 14

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 # 15

Blood is an

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 When a fluid is in motion, its flow can be considered as
A. turbulent
B. streamline
C. either or them
D. neither of them
2 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
3 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
4 Bernoulli's equation is the fundamental equation in fluid dynamics, which relates pressure to fluid
A. speed
B. height
C. none of them
D. both of them
5 Which of the following options states the names of fluids in the order of increasing viscosity?
A. mercury, motor oil, methanol
B. methanol, mercury, motor oil
C. motor oil, mercury, methanol
D. methanol, motor oil, mercury
6 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
7 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
8 Substances that do not flow easily have
A. large coefficient of viscosity
B. small coefficient of viscosity
C. either of them
D. none of them
9 A body is floating in a liquid. The up thrust on the body is
A. Equal to weight of liquid displaced
B. Zero
C. Less than the weight of liquid displaced
D. Weight of body-weight of liquid displaced
10 When the speed of a body in a fluid increases then the drag force
A. decreases
B. becomes zero
C. increases
D. non of them

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