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

Question # 2

A tube is tapered from 20 cm diameter to 2 cm diameter, the velocity at the first cross-section is 50 cm/s, then the velocity at the second cross-section is

Question # 3

Rate of flow can be expressed in

Question # 4

The blood pressure of a person

Question # 5

The analysis of fluid motion becomes simplified by using

Question # 6

The terminal velocity of water droplet of radius 1 x 10-4m and desity 1000 kg m-3descending through air of viscosity 19 x 10-6kg. m-1 s-1 is

Question # 7

The force exerted by the fluid in a hydraulic pump on the piston is 10 cm2, the fluid pressure on the piston is, in N/cm2

Question # 8

The body passing a viscous medium affected by:

Question # 9

Terminal velocity is the maximum velocity attained by a spherical droplet when the drag force______the weight of droplet:

Question # 10

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

Question # 11

With increase of temperature, the viscosity of liquid and gases

Question # 12

The smooth or steady stream-line flow is know as

Question # 13

According to Stoke's law, drag force depends on

Question # 14

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

Question # 15

The velocity of falling raindrop attains limited value because of

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 The density of blood is nearly equal to that of
A. mercury
B. sodium
C. water
D. honey
2 When there is no internal frictional forces between the adjacent layers of fluid, then the fluid is called
A. incompressible
B. compressible
C. viscous
D. non viscous
3 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
4 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
5 The fluid which is incompressible and non viscous is called
A. Ideal fluid
B. Non-ideal fluid
C. Prefect fluid
D. All
6 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:
A. Not affected due to its size
B. Twice that of small size ball
C. Four times that of small size ball
D. 1/4th of that of small size ball
7 With the increase of temperature viscosity
A. Increase
B. Decrease
C. Remains same
D. Doubles
8 The un-steady streamline flow is called
A. laminar flow
B. turbulent flow
C. both of them
D. none of them
9 Ball pen functions on the principle of
A. Viscosity
B. Boyle's law
C. Gravitational force
D. Surface tnesion
10 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

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