Mechanical Properties of Fluids Test

Result

Mechanical Properties of Fluids Test - 60

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Weekly Quiz Competition

Question 1
4 / -1

A cylindrical vessel of 90 cm height is kept filled upto the brim. It has four holes 1, 2, 3, 4 which are respectively at heights of 20 cm, 30 cm, 45 cm and 50 cm from the horizontal floor PQ. The water falling at the maximum horizontal distance from the vessel comes from

A
Hole number 4

B
Hole number 3

C
Hole number 2

D
Hole number 1

Solution
Question 2
4 / -1

A streamlined body falls through air from a height h on the surface of a liquid. If d and D(D > d) represents the densities of the material of the body and liquid respectively, then the time after which the body will be instantaneously at rest, is

A

B

C

D

Solution
Question 3
4 / -1

A
2

B
3

C
4

D
2√2

Solution
Question 4
4 / -1

Velocity of water in a river is

A
Same everywhere

B
More in the middle and less near its banks

C
Less in the middle and more near its banks

D
Increase from one bank to other bank
Question 5
4 / -1

Two rain drops of same radii ‘r’ falling with terminal velocity ‘v’ merge and form a bigger drop of radius R. The terminal velocity of the bigger drop is

A

B

C
v

D
2v

Solution
Question 6
4 / -1

Water flows steadily through a horizontal pipe of variable cross-section. If the pressure of water is P at a point where flow speed is y, the pressure at another point where the flow speed is 2v, is (Take density of water as p)

A

B

C

D

Solution
Question 7
4 / -1

A
8

B

C
16

D
Question 8
4 / -1

Two capillaries of same length and radii in the ratio 1 : 2 are connected in series. A liquid flows through them in streamlined condition. If the pressure across the two extreme ends of the combination is 1 m of water, the pressure difference across first capillary is

A
9.4 m

B
4.9 m

C
0.49 m

D
0.94 m

Solution
Question 9
4 / -1

Water flows in a streamlined manner through a capillary tube of radius a, the pressure difference being P and the rate of flow Q. 1f the radius is reduced to a/2 and the pressure increased to 2P, the rate of flow becomes

A
4Q

B
Q

C

D
Question 10
4 / -1

A viscous fluid is flowing through a cylindrical tube. The velocity distribution of the fluid is best represented by the diagram

A

B

C

D
None of these