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Fluid-mechanics Questions Set 40:

Quiz Mode

In case of power transmission through pipes, the maximum efficiency is

25%

66.66%

33.3%

50%

Solution:

The value of the surface tension of an ideal fluid is

zero

unity

infinity

more than that of real fluid

Solution:

Can the flow inside a nozzle be steady and uniform?

Yes

It can be steady but never uniform

It can be uniform but never steady

Solution:

What is the pressure (in pascals) at a point 9 m below the free surface of water?

77892 pascals

88290 pascals

22345 pascals

90000 pascals

Solution:

If a liquid enters a pipe of diameter 'd' with a velocity 'v', what will be its velocity at the exit if the diameter reduces to 0.5d?

0.5v

Solution:

What is the relationship between the static head 's', suction head 'c', and delivery head 'd' of a centrifugal pump?

s = c - d

s = c + d

s = c * d

s + c + d = 0

Solution:

A pilot tube is installed in the center of a pipe with a diameter of 85 mm. If the water rise in the tube is 460 mm, what will be the velocity of the water?

3 m/s

3.9 m/s

3.8 m/s

3.6 m/s

Solution:

The head of water over a rectangular notch is 900 mm. The discharge is 300 liters/second. Find the length of the notch when the discharge coefficient (C₁) is 0.62.

19.8 cm

19.2 cm

17.4 cm

16 cm

Solution:

When is a fluid flow considered turbulent?

When the fluid has high viscosity

When the Reynolds number is less than 2000

When the Reynolds number is greater than 2000

When the density of the fluid is low

Solution:

In a 50% reaction turbine stage, the tangential component of absolute velocity at the rotor inlet is 637 m/s and the blade velocity is 354 m/s. What is the power output in kW of the steam?

322.7

323.7

324.7

325.7

Fluid-mechanics Questions Set 40:

In case of power transmission through pipes, the maximum efficiency is

Solution:

The value of the surface tension of an ideal fluid is

Solution:

Can the flow inside a nozzle be steady and uniform?

Solution:

What is the pressure (in pascals) at a point 9 m below the free surface of water?

Solution:

If a liquid enters a pipe of diameter 'd' with a velocity 'v', what will be its velocity at the exit if the diameter reduces to 0.5d?

Solution:

What is the relationship between the static head 's', suction head 'c', and delivery head 'd' of a centrifugal pump?

Solution:

A pilot tube is installed in the center of a pipe with a diameter of 85 mm. If the water rise in the tube is 460 mm, what will be the velocity of the water?

Solution:

The head of water over a rectangular notch is 900 mm. The discharge is 300 liters/second. Find the length of the notch when the discharge coefficient (C₁) is 0.62.

Solution:

When is a fluid flow considered turbulent?

Solution:

In a 50% reaction turbine stage, the tangential component of absolute velocity at the rotor inlet is 637 m/s and the blade velocity is 354 m/s. What is the power output in kW of the steam?

Solution:

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