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

A massive object falls through a fluid:

Question # 2

The unit of viscosity is SI system is:

Question # 3

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

Question # 4

Stoke;s law is not applicable when the speed of the object moving through a fluid is:

Question # 5

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

Question # 6

The equation of continuity
A1V1= A2V2is for the flow of

Question # 7

A water hose with an internal diameter of 20 mm at the outlet discharges 30 kg of water in 60 s. What is water speed at the outlet if density of water is 1000 kg/m3during its steady flow

Question # 8

If water rises 4 cm in a long, thin tube because of capillary action, then, under corresponding conditions of use, the rise (in the tube) of a liquid whose density is 2 g/cm2will be

Question # 9

Stock's law holds for:

Question # 10

In case of streamed lined flow of liquid, the loss of energy is

Question # 11

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

Question # 12

According to the Bernoulli's theorem the pressure velocity are

Question # 13

If every particle of the flow that passes a particular point, moves along the same path as followed by particles which passed the point earlier, then this flow is said to be

Question # 14

Fluid friction is _____ the friction between two solid surfaces:

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 During the free fall motion of an object, when its weight becomes equal to the drag force, then it will move with
A. maximum speed
B. zero speed
C. maximum speed
D. none of them
2 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
3 Fluid A is more viscous than fluid B. While flowing through a pipe of the same dimensions and material which fluid takes longer to travel at 25°C?
A. fluid B
B. fluid A
C. both take the same time
D. not possible to determine from given information
4 Fluids resist force, This property is called
A. Stiffness
B. Strength
C. Ductility
D. Elasticity
5 Blood vessels can be stretch like rubber, therefore they are
A. rigid
B. hard
C. very thick
D. not rigid
6 Surface tension of water is reduced by adding
A. Detergents
B. Camphor
C. Plastic
D. Both A and B
7 At low speeds, the drag force is
A. proportional to speed
B. inversely proportional to speed
C. not simply proportional to speed
D. none of them
8 At high altitude the blood oozes out of the nose and ear because
A. The blood pressure increase at high altitudes
B. The percentage of oxygen in the air increase
C. The atmospheric pressure decrease there
D. The density of blood decrease at high altitudes
9 Which of the following has the greatest coefficient of viscosity?
A. water
B. gasoline
C. honey
D. tar
10 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

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