Fluids And Pressure Test

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Fluids And Pressure Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

Water is flowing through a pipe of uniform cross-section under constant pressure. At some place, the pipe becomes narrow. The pressure of water at that place

A
increases

B
decreases

C
remains unchanged

D
depends on several factors

Solution

Water is flowing through a pipe of uniform cross-section under constant pressure. At some place, the pipe becomes narrow. The pressure of water at that place decreases because the flow velocity of water increases.
Question 2
1 / -0

Pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid and the walls of the containing vessel. This law was first formulated by

A
Bernoulli

B
Archimedes'

C
Boyle

D
Pascal

Solution

Pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid and the walls of the containing vessel. This law was first formulated by Pascal.
Question 3
1 / -0

Raindrops of different radii are falling through air. The terminal velocity of a drop of radius r will be proportional to

A
r³

B
r²

C
r

D
1/r

Solution

Raindrops of different radii are falling through air. The terminal velocity of a drop of radius r will be proportional to r²
Question 4
1 / -0

Why does a camel have large feet?

A
To minimise pressure on ground and prevent sinking

B
To increase friction

C
To help it absorb heat from sand

D
To prevent it from toppling

Solution

A camel has large feet to minimise the pressure on ground and prevent sinking because P = F / A.
Question 5
1 / -0

Two stretched membranes of area 2 cm²and 3 cm² and are placed in a liquid at the same depth. The ratio of the pressures on them is

A
1 : 1

B
2 : 3

C
3 : 2

D
2² : 3²

Solution

Two stretched membranes of area 2 cm² and 3 cm² and are placed in a liquid at the same depth. The ratio of the pressures on them is 1 : 1 beacuse Pressure is independent of area of cross section
Question 6
1 / -0

What is the variation of pressure as depth of a compressible fluid increases?

A
Increment

B
Decrement

C
Constant

D
First decrement, then increment

Solution

Increment iss the variation of pressure as depth of a compressible fluid increases
Question 7
1 / -0

Why does the surface of water in a tumbler remain horizontal?

A
Due to surface tension

B
Due to cohesive force

C
Due to gravitational force

D
Due to adhesive force

Solution

Due to cohesive force the surface of water in a tumbler remain horizontal

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Fluids And Pressure Test - 2

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Fluids And Pressure Test - 2

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Question 1

increases

decreases

remains unchanged

depends on several factors

Solution

Question 2

Bernoulli

Archimedes'

Boyle

Pascal

Solution

Question 3

r3

r2

r

1/r

Solution

Question 4

To minimise pressure on ground and prevent sinking

To increase friction

To help it absorb heat from sand

To prevent it from toppling

Solution

Question 5

1 : 1

2 : 3

3 : 2

22 : 32

Solution

Question 6

Increment

Decrement

Constant

First decrement, then increment

Solution

Question 7

Due to surface tension

Due to cohesive force

Due to gravitational force

Due to adhesive force

Solution

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r³

r²

2² : 3²