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

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

Question # 2

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

Question # 3

The value of viscosity of a fluid is dependent on (at constant temperature)

Question # 4

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

Question # 5

According to the Bernoulli's theorem the pressure velocity are

Question # 6

The analysis of fluid motion becomes simplified by using

Question # 7

The internal pressure of the blood is

Question # 8

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 # 9

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

Question # 10

Fire fighters have jet attached to the head of their water pipes in order to

Question # 11

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 # 12

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

Question # 13

During the steady flow, different streamlines

Question # 14

The fluid is incompressible, if itsdensity is

Question # 15

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

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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 property of fluids due to which they resist their own flow is called:
A. Drag force
B. Surface tension
C. Viscosity
D. None of these
3 Drag force increases if speed of the object moving through the fluid:
A. Increases
B. Decreases
C. Remains constant
D. None of these
4 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
5 Stoke;s law is not applicable when the speed of the object moving through a fluid is:
A. Zero
B. Small
C. Large
D. None of these
6 The terminal velocity of a small size spherical body of radius R moving in a fluid varies as
A. R
B. R2
C. 1/R
D. (1/R)2
7 Viscosity of water is ______ that of air but ___ that of plasma.
A. More, more
B. Less, more
C. Less, less
D. More, less
8 The smooth or steady stream-line flow is know as
A. Laminar flow
B. Turbulent flow
C. Both a and b
D. None of the above
9 Which of the following options correctly states the equation of continuity for an ideal fluid?
A. A1A2= V1V2
B. A1/A2= V2/V1
C. A1/A2= V1/V2
D. none of the above
10 When the droplet moves with terminal velocity in a fluid, the net force acting on the droplet is:
A. FD-mg
B. Zero
C. mg-FD
D. None of these

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