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

The unit of viscosity is SI system is:

Question # 2

N s m-2is unit of:

Question # 3

When the velocity of a liquid flowing steadily in a tube increases, its pressure?

Question # 4

A person standing near the track of a fast moving train has tendency to fall towards it because of

Question # 5

Blood pressure is measured by the instrument

Question # 6

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

Question # 7

When weight of an object falling freely becomes equal to the drag force, then the body will move with

Question # 8

The smooth or steady streamline flow is known as

Question # 9

The value of viscosity of a fluid is dependent on (at constant temperature)

Question # 10

Stock's law holds for:

Question # 11

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

Question # 12

The fluid which is incompressible and non viscous is called

Question # 13

Ball pen functions on the principle of

Question # 14

According to the Bernoulli's equation, where the speed of the fluid is high, the pressure will be

Question # 15

The equation of continuity is

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 Fluid friction is _____ the friction between two solid surfaces:
A. Greater than
B. Smaller than
C. Equal to
D. None of these
2 At high speed, fluid friction _____ and fuel consumption ___,:
A. Increases, decreases
B. Increases, increases
C. Decreases, increases
D. None of these
3 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
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 A massive object falls through a fluid:
A. Faster
B. Slower
C. Slowest
D. None
6 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
7 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
8 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
9 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
10 Deep water almost runs still when surface water flow in rivers. What does it explains
A. Magnus effect
B. Equation of continuity
C. Surface energy
D. Bernoulli's equation

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