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

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

Question # 2

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

Question # 3

The body passing a viscous medium affected by:

Question # 4

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

Question # 5

According to the equation of continuity, when water falls from the tap, it's speed increases and its cross-sectional area

Question # 6

Bernoulli's equation is based upon law of conversation of

Question # 7

The mass of fluid passing through any cross-section per unit time is called

Question # 8

Viscosity is defined as

Question # 9

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

Question # 10

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

Question # 11

The pressure will be low where the speed of the fluid is

Question # 12

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

Question # 13

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 # 14

Bernoulli's equation is based upon law of conversation

Question # 15

The product of cross-sectional area of the pipe and the fluid speed at any pint along the pipe is

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 The drag force acting on a spherical droplet of radius 10-5m moving with a velocity of 1 cm/sec in a fluid of velocity 5.31 x 10-7m/sec. The units comes out to be:
A. 10-16N
B. 10-14N
C. 10-12N
D. 10-10N
2 Machine parts are jammed due to:
A. Increasing in viscosity of lubricant
B. Decreasing in viscosity of lubricant
C. Decreasing in surface tension of lubricant
D. None of these
3 At the starting point of the free fall motion of an object, its acceleration will be
A. maximum
B. minimum
C. zero
D. none of them
4 A container has a small hole in the bottom. Air can go through this hole,but water cannot. This can be best explained by the statement that
A. water contains hydrogen atoms, air does not
B. water molecules are smaller than molecules in the air
C. water molecules are smaller than molecules in the air
D. surface tension of the water prevents it from
5 The flow of an ideal fluid is
A. streamline flow
B. incompressible flow
C. non-viscous
D. all of the above
6 When the different streamlines cannot cross each other, then this condition is known as
A. continuity condition
B. turbulent flow condition
C. steady flow condition
D. none of them
7 In a normal healthy person the value of diastolic pressure is
A. 75 - 80 torr
B. 100 torr
C. 120 torr
D. none of them
8 The fluid is incompressible, if itsdensity is
A. zero
B. constant
C. very high
D. very small
9 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
10 Where the streamlines are very close to each other, the pressure will be
A. low
B. zero
C. high
D. all of them

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