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

When a water droplet falls through air, the net force on it is

Question # 2

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

Question # 3

In a normal healthy person the value of diastolic pressure is

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

Where the streamlines are very far apart from each other, the pressure will be

Question # 8

A massive object falls through a fluid:

Question # 9

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

Question # 10

During the free fall motion of an object, when its weight becomes equal to the drag force, then it will move with

Question # 11

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

Question # 12

The rain drop falling from the sky reach the ground with

Question # 13

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 # 14

When the droplet moves with terminal velocity in a fluid, the net force acting on the droplet is:

Question # 15

With increase of temperature, the viscosity of liquid and gases

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 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
2 The product of cross-sectional area of the pipe and the fluid speed at any point along the pipe is called
A. constant rate
B. volume rate
C. flow rate
D. steady rate
3 High speed meteors rushing through air reduces to ashes because of:
A. Force of gravity
B. High resistance of air
C. Drag force
D. None of these
4 If every particle of the flow that passes a particular point, moves along the same path as followed by particles which passed the point earlier, then this flow is said to be
A. turbulent
B. streamline
C. abrupt
D. none of them
5 During the steady flow, different streamlines
A. cannot across each other
B. can across each other
C. either of them
D. neither of them
6 In Bernoulli's theorem the relation between velocity and pressure is
A. Inverse
B. Direct
C. None of the above
D. Both a and b
7 The fluid which is incompressible and non viscous is called
A. Ideal fluid
B. Non-ideal fluid
C. Prefect fluid
D. All
8 An object moving through a fluid experiences a retarding force called a
A. frictional force
B. terminal force
C. opposing force
D. drag force
9 When a fluid is in motion, its flow can be considered as
A. turbulent
B. streamline
C. either or them
D. neither of them
10 Terminal velocity is the maximum velocity attained by a spherical droplet when the drag force______the weight of droplet:
A. Is smaller than
B. Is greater than
C. Becomes equal to
D. None of these

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