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

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 # 2

The electrical forces between the molecules of a liquid are

Question # 3

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

Question # 4

Machine parts are jammed due to:

Question # 5

Blood pressure is measured by the instrument

Question # 6

The density of water is 103kg/m3. The water pressure on a submarine is 2.0 x 107N/m2. The depth of the submarine below the surface of the water, in maters, is approximately

Question # 7

When a fluid is in motion, its flow can be considered as

Question # 8

Fluid friction is _____ the friction between two solid surfaces:

Question # 9

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

Question # 10

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

Question # 11

Stock's law holds for:

Question # 12

At high speed, fluid friction _____ and fuel consumption ___,:

Question # 13

Above a certain velocity of a fluid is called

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 6 Important MCQ's

Sr.# Question Answer
1 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
2 The density of blood is nearly equal to that of
A. mercury
B. sodium
C. water
D. honey
3 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
4 The pressure will be low where the speed of the fluid is
A. Zero
B. High
C. Low
D. Constant
5 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
6 Fluids resist force, This property is called
A. Stiffness
B. Strength
C. Ductility
D. Elasticity
7 Rate of flow can be expressed in
A. litre/sec
B. litre-sec
C. sec/litre
D. sec/litre-m
8 Stoke;s law is not applicable when the speed of the object moving through a fluid is:
A. Zero
B. Small
C. Large
D. None of these
9 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
10 Under normal circumstances, the volume of blood is sufficient to keep the vessels
A. flatted for all times
B. inflated for all times
C. inflated for small times
D. none of them

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