Hydraulics and fluid mechanics MCQ with Answers

16) In a venturimeter, the velocity of liquid at throat is __________ than at inlet.

Answer is:

higher

In a venturimeter, the velocity of liquid at throat is __________ than at inlet.

17) The loss of head due to friction in a pipe of uniform diameter in which a viscous flow is taking place, is (where R_N = Reynold number)

Answer is:

16/R_N

18) Which of the following is an example of laminar flow?

Answer is:

all of these

Explanation:

Under ground flow, Flow past tiny bodies and Flow of oil in measuring instruments are example of laminar flow.

19) The pressure less than atmospheric pressure is known as

Answer is:

all of these

Explanation:

Vacuum pressure: For pressures below atmospheric, the gauge pressure will be negative. This negative gauge pressure is known as vacuum pressure. Therefore

Absolute pressure = Atmospheric pressure - Negative gauge pressure or vacuum pressure

The pressure less than atmospheric pressure is known as
* suction pressure
* vacuum pressure
* negative gauge pressure

The pressure less than atmospheric pressure is known as

20) The total energy line lies over the hydraulic gradient line by an amount equal to the

Answer is:

16) In a venturimeter, the velocity of liquid at throat is __________ than at inlet.

higher

17) The loss of head due to friction in a pipe of uniform diameter in which a viscous flow is taking place, is (where RN = Reynold number)

16/RN

18) Which of the following is an example of laminar flow?

all of these

19) The pressure less than atmospheric pressure is known as

all of these

20) The total energy line lies over the hydraulic gradient line by an amount equal to the

velocity head

17) The loss of head due to friction in a pipe of uniform diameter in which a viscous flow is taking place, is (where R_N = Reynold number)

16/R_N