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

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

Question # 2

When a water droplet falling freely through air, the drag force on water droplet increases with th

Question # 3

The property of fluids due to which they resist their own flow is called:

Question # 4

According to Stoke's law, drag force depends on

Question # 5

Blood pressure is measured by the instrument

Question # 6

If v is the velocity of flow of liquid through a tube of area of cross-section A, then according to equation of continuity

Question # 7

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

Question # 8

Ball pen functions on the principle of

Question # 9

N s m-2is unit of:

Question # 10

Which of the following options states the names of fluids in the order of increasing viscosity?

Question # 11

A tube is tapered from 20 cm diameter to 2 cm diameter, the velocity at the first cross-section is 50 cm/s, then the velocity at the second cross-section is

Question # 12

According to the Bernoulli's theorem the pressure velocity are

Question # 13

The irregular and unsteady flow of the fluid is called

Question # 14

The fluid which is incompressible and non viscous is called

Question # 15

The maximum drag force on a falling sphere is 9.8 N, it weight is

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 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
2 If one of the pipes has a much smaller diameter than the other and are placed horizontally then form both sides of Bernoulli's equation, we can drop the term
A. P
B. 1/2 fv2
C. pgh
D. none of them
3 A person standing near the track of a fast moving train has tendency to fall towards it because of
A. Vibration due to motion of train
B. Gravitation force of attraction between person and trains
C. The high speed of train
D. Some other effect
4 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
5 Fog droplets are suspended in air when their weight is balanced by:
A. Force of gravity
B. Upward trust due to air
C. Surface tension
D. None of these
6 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
7 A body is floating in a liquid. The up thrust on the body is
A. Equal to weight of liquid displaced
B. Zero
C. Less than the weight of liquid displaced
D. Weight of body-weight of liquid displaced
8 According to the Bernoulli's theorem the pressure velocity are
A. equal to each other
B. proportional to each other
C. inversely proportional to each other
D. none of them
9 A high concentration of red blood cells increases its viscosity from
A. 3 - 5 times that of mercury
B. 5 - 8 times that of mercury
C. 3 - 5 times that of water
D. 5 - 8 times that of water
10 Viscosity of water is ______ that of air but ___ that of plasma.
A. More, more
B. Less, more
C. Less, less
D. More, less

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