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

The smooth or steady stream-line flow is know as

Question # 2

The flow of an ideal fluid is

Question # 3

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:

Question # 4

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

Question # 5

The value for systolic blood pressure for a normal healthy person is

Question # 6

A device used to measure the speed of liquid flow is known as

Question # 7

In deriving the Bernoulli's equation, we assume that the fluid is

Question # 8

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 # 9

The terminal velocity of a small size spherical body of radius R moving in a fluid varies as

Question # 10

The instrument which detects the instant at which external pressure becomes equal to the systolic pressure is

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

The velocity of falling raindrop attains limited value because of

Question # 15

According to Stoke's law, drag force depends on

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 During the steady flow, different streamlines
A. cannot across each other
B. can across each other
C. either of them
D. neither of them
2 Fluid friction is _____ the friction between two solid surfaces:
A. Greater than
B. Smaller than
C. Equal to
D. None of these
3 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
A. 20
B. 200
C. 2000
D. 20,000
4 The SI unit of viscosity is
A. kg m-1s-1
B. kg ms-1
C. kg m-1s-2
D. kg m-1s
5 What is another name for laminar flow?
A. streamline
B. unsteady flow
C. turbulent flow
D. both (a) and (b)
6 At low speeds, the drag force is
A. proportional to speed
B. inversely proportional to speed
C. not simply proportional to speed
D. none of them
7 The _____ viscous the medium is _____, is the value of terminal velocity of the droplet:
A. More, lesser
B. Lesser, more
C. Both A and B
D. Lesser, lesser
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
A. v/A = constant
B. A/v = constant
C. Av = constant
D. None
9 Stock's law holds for:
A. Motion through free space
B. Motion through viscous medium
C. Bodies of all shapes
D. None of these
10 When the velocity of a liquid flowing steadily in a tube increases, its pressure?
A. Decreases
B. Increases
C. Remains same
D. Zero

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