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

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

Question # 2

Internal friction of fluid is called

Question # 3

The SI unit of viscosity is

Question # 4

A body is moving through a viscous medium eventually comes to rest because of:

Question # 5

Bernoulli's equation is important in the field of

Question # 6

Which of the following is a characteristic of an ideal fluid?

Question # 7

High speed meteors rushing through air reduces to ashes because of:

Question # 8

Terminal velocity is the maximum velocity attained by a spherical droplet when the drag force______the weight of droplet:

Question # 9

When the upward drag force of the fluid becomes equal to downward force of gravity of the droplet, then its velocity:

Question # 10

The un-steady streamline flow is called

Question # 11

A tube tapers from 20 cm diameter to 2 cm, the velocity at first cross-section is 50 ms-1then velocity at second cross-section is

Question # 12

Machine parts are jammed due to:

Question # 13

Ball pen functions on the principle of

Question # 14

Two copper balls of 1 cm and 2 cm in diameter are simultaneously dropped in the same viscous medium. The terminal velocity of bigger ball is:

Question # 15

Deep water almost runs still when surface water flow in rivers. What does it explains

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 The product of cross-sectional area of the pipe and the fluid speed at any pint along the pipe is
A. very high
B. very low
C. constant
D. zero
2 The law of conservation of energy gives us
A. equation of continuity
B. Bernoulli's theorem
C. both of them
D. none of them
3 The application of Bernoulli's equation is
A. Torricelli's theorem
B. Venture relation
C. Binomial theorem
D. Both a and b
4 With the increase of temperature viscosity
A. Increase
B. Decrease
C. Remains same
D. Doubles
5 A massive object falls through a fluid:
A. Faster
B. Slower
C. Slowest
D. None
6 Liquids and gasses have
A. zero viscosity
B. non-zero viscosity
C. very large viscosity
D. very small viscosity
7 The terminal velocity of water droplet of radius 1 x 10-4m and desity 1000 kg m-3descending through air of viscosity 19 x 10-6kg. m-1 s-1 is
A. 2.5 ms-1
B. 3.2 ms-1
C. 4.3 ms-1
D. 1.1 ms-1
8 Density of fluid is defined as:
A. Its volume to mass ratio
B. Product of volume and mass
C. Its mass of volume ratio
D. None of these
9 The un-steady streamline flow is called
A. laminar flow
B. turbulent flow
C. both of them
D. none of them
10 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

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