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

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

Question # 2

Glycerin has viscosity _____ the viscosity of water:

Question # 3

A high concentration of red blood cells increases its viscosity from

Question # 4

At high speed, fluid friction _____ and fuel consumption ___,:

Question # 5

When the droplet moves with terminal velocity in a fluid, the net force acting on the droplet is:

Question # 6

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

Question # 7

Bernoulli's equation is important in the field of

Question # 8

Which of the following has the greatest coefficient of viscosity?

Question # 9

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

Question # 10

A container has a small hole in the bottom. Air can go through this hole,but water cannot. This can be best explained by the statement that

Question # 11

In a normal healthy person the value of diastolic pressure is

Question # 12

Substances that flow easily have

Question # 13

The analysis of fluid motion becomes simplified by using

Question # 14

The study of fluid in motion basically involves law of conservation of:

Question # 15

A body is floating in a liquid. The up thrust on the body is

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 Where the streamlines are very close to each other, the pressure will be
A. low
B. zero
C. high
D. all of them
2 Where the streamlines are very far apart from each other, the pressure will be
A. low
B. zero
C. high
D. all of them
3 When a water droplet falling freely through air, the drag force on water droplet increases with th
A. decrease in speed
B. increase in speed
C. pressure
D. none of them
4 In a surface tension experiment with a capillary tube water rises up to 0.1 m. if the same experiment is repeated on an artificial satellite, which is resolving around the earth, water will rise in the capillary tube up to a height of
A. 0.1 m
B. 0.2 m
C. 0.98 m
D. Full length of the capillary tube
5 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
A. 1/4 times
B. 4 times
C. Twice
D. 1/2 of 8 cm diameter pipe
6 The terminal velocity of a small size spherical body of radius R moving in a fluid varies as
A. R
B. R2
C. 1/R
D. (1/R)2
7 When weight of an object falling freely becomes equal to the drag force, then the body will move with
A. increasing speed
B. decreasing speed
C. constant speed
D. none of them
8 Surface tension of water is reduced by adding
A. Detergents
B. Camphor
C. Plastic
D. Both A and B
9 Internal friction of fluid is called
A. Surface tension
B. Viscosity
C. Resistance
D. Cohesive force
10 Fire fighters have jet attached to the head of their water pipes in order to
A. Increase the mass of water flowing per second
B. Increase the velocity of water flowing out
C. Increase the volume of water flowing per second
D. Avoid wastage of water

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