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 flow of an ideal fluid is

Question # 2

In Bernoulli's theorem the relation between velocity and pressure is

Question # 3

The rain drop falling from the sky reach the ground with

Question # 4

With the increase of temperature viscosity

Question # 5

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

Question # 6

The unit of viscosity is SI system is:

Question # 7

According to slok's law, drag force depends on

Question # 8

What are the SI base units of the coefficient of viscosity

Question # 9

One torr is equal to

Question # 10

The _____ viscous the medium is _____, is the value of terminal velocity of the droplet:

Question # 11

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

Question # 12

The equation of continuity
A1V1= A2V2is for the flow of

Question # 13

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

Question # 14

Ball pen functions on the principle of

Question # 15

Viscosity of water is ______ that of air but ___ that of plasma.

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 Drag force increases if speed of the object moving through the fluid:
A. Increases
B. Decreases
C. Remains constant
D. None of these
2 A flowing liquid possess
A. K.E
B. P.E
C. Pressure Energy
D. All
3 During the steady flow, different streamlines
A. cannot across each other
B. can across each other
C. either of them
D. neither of them
4 Surface tension of water is due to
A. Inter molecular attractions
B. Inter molecular spaces
C. Inter molecular repulsion
D. None of above
5 When the upward drag force of the fluid becomes equal to downward force of gravity of the droplet, then its velocity:
A. Starts increasing
B. Starts decreasing
C. Becomes constant
D. Is called escape velocity
6 With increase of temperature, the viscosity of liquid and gases
A. Increases for both
B. Decreases for both
C. Increases for liquids and decreases for gases
D. Decreases for liquids and increases for gases
7 0.10 cm can be written as:
A. 1.0 x 10-2m
B. 1.0 x 10-3cm
C. 1.0 x 10-4cm
D. 1. x 10-4m
8 The smooth or steady streamline flow is known as
A. laminar flow
B. turbulent flow
C. both of them
D. none of them
9 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
10 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

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