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

Fluids have three types of energies. The Bernoulli's equation combines those energies.which of the following is one of the three enrgies possessed by a fluid?

Question # 2

Drag force increases if speed of the object moving through the fluid:

Question # 3

The analysis of fluid motion becomes simplified by using

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

A massive object falls through a fluid:

Question # 6

Fluids resist force, This property is called

Question # 7

When there is no internal frictional forces between the adjacent layers of fluid, then the fluid is called

Question # 8

The flow of an ideal fluid is

Question # 9

The dimensions of viscosity are:

Question # 10

Fog droplets are suspended in air when their weight is balanced by:

Question # 11

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

Question # 12

At low speeds, the drag force is

Question # 13

A tube tapers from 20 cm diameter to 2 cm, the velocity at first cross-section is 50 ms-1then velocity at second cross-section is

Question # 14

According to Stoke's law, drag force depends on

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 Rate of flow can be expressed in
A. litre/sec
B. litre-sec
C. sec/litre
D. sec/litre-m
2 Blood is an
A. Compressible fluid
B. incompressible fluid
C. hard
D. none of them
3 The blood pressure of a person
A. decrease with age
B. increase with age
C. has no effect with age
D. none of them
4 Ball pen functions on the principle of
A. Viscosity
B. Boyle's law
C. Gravitational force
D. Surface tnesion
5 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
A. 1/4 times
B. 4 times
C. Twice
D. 1/2 of 8 cm diameter pipe
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 The irregular and unsteady flow of the fluid is called
A. turbulent flow
B. steady flow
C. either of them
D. both of them
8 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
A. 50 m/s
B. 20 m/s
C. 40 cm/s
D. 5 cm/s
9 When the speed of a body in a fluid increases then the drag force
A. decreases
B. becomes zero
C. increases
D. non of them
10 The mass of fluid passing through any cross-section per unit time is called
A. electric flux
B. magnetic flux
C. mass flux
D. none of them

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