ECAT Pre Engineering Physics Chapter 6 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 6 Fluid Dynamics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 6 Fluid Dynamics

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Physics ECAT Pre Engineering Chapter 6 Fluid Dynamics

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Question # 1

According to slok's law, drag force depends on

Question # 2

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 # 3

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

Question # 4

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

Question # 5

The analysis of fluid motion becomes simplified by using

Question # 6

With the increase of temperature viscosity

Question # 7

In Bernoulli's theorem the relation between velocity and pressure 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 fluid at a certain point has 50 J of potential energy per unit volume, 75 J of kinetic energy per unit volume,and 35 J of pressure energy per unit volume. the total energy of the fluid is

Question # 10

The blood pressure of a person

Question # 11

Blood vessels can be stretch like rubber, therefore they are

Question # 12

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

Question # 13

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 # 14

Stoke;s law is not applicable when the speed of the object moving through a fluid is:

Question # 15

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

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 In a surface tension experiment with a capillary tube water rises up to 0.1 m. if the same experiment is repeated on an artificial satellite, which is resolving around the earth, water will rise in the capillary tube up to a height of
A. 0.1 m
B. 0.2 m
C. 0.98 m
D. Full length of the capillary tube
2 In the case of an incompressible fluid in stead flow the net rate of flow of mass entering one end of the tube of flow is equal to the net rate of flow of mass leaving the other end. This equation is called
A. Quadratic equation
B. Equation of discontinuity
C. Equation of continuity
D. None of the above
3 Bernoulli's equation is based upon law of conversation of
A. mass
B. momentum
C. Energy
D. None
4 The dimensions of viscosity are:
A. M2L-1T-2
B. M-1L1T-1
C. M-1L-1T
D. ML-1T-1
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 If the flow is incompressible and the flow is steady then the mass of the fluid through the pipe
A. increases
B. decreases
C. becomes zero
D. is conserved
7 The rain drop falling from the sky reach the ground with
A. Constant terminal velocity
B. Constant gravitational acceleration
C. Variable acceleration
D. acceleration greater than g
8 In a container having water filled up to a height h, a hole is made in the bottom. The velocity of water flowing out of the hole is
A. Independent of h
B. Proportional to h1/2
C. Proportional to h
D. Proportional to h2
9 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
A. 2.5 ms-1
B. 3.2 ms-1
C. 4.3 ms-1
D. 1.1 ms-1
10 The velocity of falling raindrop attains limited value because of
A. Up trust of air
B. Viscous force exerted by air
C. Surface tension effect
D. Air currents atmosphere

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