This BITSAT free online test consists of BITSAT fluid mechanics questions which are part of the BITSAT Physics section.

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The pressure at the bottom of a tank of liquid is not proportional to

the height of the liquid

the density of the liquid

the acceleration

the area of the liquid surface

in each heart beat, heart pumps 80ml of blood at an average pressure of 100mm of Hg. What will the power output of the heart?(Assume 60 heart beat per minute)

1 W

1.06 W

2.75 W

0.5 W

When equal voumes of two substances are mixed, the specific gravity of mixture is 4. When equal weights of the same substances are mixed, the specific gravity of the mixture is 3. The substances would be

6 and 2

5 and 4

3 and 4

2.5 and 3.5

A body weighs 5N in air and 2N when immersed in a liquid. Then the buoyant force is:

3.5 N

7.5 N

3N

7N

A neckless weighing 50 g in air, but it wheighs 46 g in water . Assume copper is mixed with gold to prepare the neckless. Find out how much of copper is present in it?(specific gravity of gold is 20 and that of copper is 10)

40g

35g

30g

25 g

a soft plastic bag of weight w is filled with air at STP. Now weight of bag in air is w’. Then

w

w=w’

none of these

w>w’

w>=w’

A block weighs 15N and 12N in air and water respectively. When it is immersed in another liquid, it weighs 13N, then find the relative density of the block

5

10

2

6

a vessel contains oil (density 0.8 gm/cc) over murcury ( density 13.6 gm/cc). A homogeneous sphere floats with half its volume immersed in mercury and the other half in oil, the density of material of the sphere in gm/cc is :

7.2

6.4

12.8

3.3

In a steady incompressible flow of a liquid

the speed does not change if the area of crosss ection changes

the speed increases if the area of cross section increases

bubbles are produced when the area of the cross section increases

the speed decreases if the area of cross section increases

Bernoulli’s equation is applicable to points

in a straight line per pendicular to stream line

in a steadily flowing liquid

in any viscous liquid

in a stream line

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