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 equation of continuity is

Question # 2

A fluid at a certain point has 50 J of potential energy per unit volume, 75 J of kinetic energy per unit volume,and 35 J of pressure energy per unit volume. the total energy of the fluid is

Question # 3

Density of fluid is defined as:

Question # 4

During the steady flow, different streamlines

Question # 5

Blood has a density

Question # 6

At high speed, fluid friction _____ and fuel consumption ___,:

Question # 7

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

Question # 8

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

Question # 9

Rate of flow can be expressed in

Question # 10

When the different streamlines cannot cross each other, then this condition is known as

Question # 11

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

Question # 12

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

Question # 13

Viscosity is defined as

Question # 14

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 # 15

What is another name for laminar flow?

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 A body is moving through a viscous medium eventually comes to rest because of:
A. Force of gravity
B. Force of friction
C. Its weight
D. Both A and C
2 According to slok's law, drag force depends on
A. Radius of the spherical body
B. Terminal velocity of body
C. Coefficient of viscosity
D. All of above
3 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
4 In deriving the Bernoulli's equation, we assume that the fluid is
A. incompressible
B. no viscous
C. flows in a steady manner
D. all of them
5 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
6 When a water droplet falls through air, the net force on it is
A. Net force = drag force - weight
B. Net force = weight - drag force
C. Net force = drag force + weight
D. Net force = weight + drag force
7 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
8 The pressure will be low where the speed of the fluid is
A. Zero
B. High
C. Low
D. Constant
9 Glycerin has viscosity _____ the viscosity of water:
A. More than
B. Equal to
C. Less than
D. None of these
10 Stock's law holds for:
A. Motion through free space
B. Motion through viscous medium
C. Bodies of all shapes
D. None of these

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