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

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 # 2

In deriving the Bernoulli's equation, we assume that the fluid is

Question # 3

Bernoulli's equation is based upon law of conservation

Question # 4

Surface tension of water is due to

Question # 5

At low speeds, the drag force is

Question # 6

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

Question # 7

Fire fighters have jet attached to the head of their water pipes in order to

Question # 8

The value for systolic blood pressure for a normal healthy person is

Question # 9

The direction of the streamlines is the same as the direction of the

Question # 10

Glycerin has viscosity _____ the viscosity of water:

Question # 11

Density of fluid is defined as:

Question # 12

When a water droplet falls through air, the net force on it is

Question # 13

N s m-2is unit of:

Question # 14

Stock's law holds for:

Question # 15

When the speed of a body in a fluid increases then the drag force

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 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
A. 1.3 m/s
B. 1.6 m/s
C. 1.9 m/s
D. 2.2 m/s
2 In a container having water filled up to a height h, a hole is made in the bottom. The velocity of water flowing out of the hole is
A. Independent of h
B. Proportional to h1/2
C. Proportional to h
D. Proportional to h2
3 If v is the velocity of flow of liquid through a tube of area of cross-section A, then according to equation of continuity
A. v/A = constant
B. A/v = constant
C. Av = constant
D. None
4 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
5 Stoke;s law is not applicable when the speed of the object moving through a fluid is:
A. Zero
B. Small
C. Large
D. None of these
6 According to the equation of continuity, when water falls from the tap, it's speed increases and its cross-sectional area
A. decreases
B. increases
C. becomes zero
D. none of them
7 High speed meteors rushing through air reduces to ashes because of:
A. Force of gravity
B. High resistance of air
C. Drag force
D. None of these
8 The un-steady streamline flow is called
A. laminar flow
B. turbulent flow
C. both of them
D. none of them
9 According to Stoke's law, drag force depends on
A. Initial velocity
B. Final velocity
C. Terminal velocity
D. Instantaneous velocity
10 The value of viscosity of a fluid is dependent on (at constant temperature)
A. the fluid itself
B. the fluid and its container
C. anything in contact with the fluid
D. all of the above

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