Hydraulics and Fluid Mechanics problems
- 1. The Bernoulli's equation is based on the assumption that
Options- A. there is no loss of energy of the liquid flowing
- B. the velocity of flow is uniform across any cross-section of the pipe
- C. no force except gravity acts on the fluid
- D. all of the above Discuss
Correct Answer: all of the above
- 2. The centre of buoyancy is the centre of area of the immersed body.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 3. A flow in which the volume of a fluid and its density does not change during the flow is called __________ flow.
Options- A. incompressible
- B. compressible Discuss
Correct Answer: incompressible
- 4. The loss of head due to an obstruction in a pipe is twice the loss of head at its entrance.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
- 5. The discharge through a siphon spillway is
Options- A. Cd x a2gH
- B. Cd x a2g x H3/2
- C. Cd x a2g x H2
- D. Cd x a2g x H5/2 Discuss
Correct Answer: Cd x a2gH
- 6. The centre of gravity of the volume of the liquid displaced is called
Options- A. centre of pressure
- B. centre of buoyancy
- C. metacentre
- D. none of these Discuss
Correct Answer: centre of buoyancy
- 7. In a free nappe,
Options- A. the pressure below the nappe is atmospheric
- B. the pressure below the nappe is negative
- C. the pressure above the nappe is atmospheric
- D. the pressure above the nappe is negative Discuss
Correct Answer: the pressure below the nappe is atmospheric
- 8. The maximum efficiency of transmission through a pipe is
Options- A. 50%
- B. 56.7%
- C. 66.67%
- D. 76.66% Discuss
Correct Answer: 66.67%
- 9. In a depressed nappe
Options- A. the pressure below the nappe is atmospheric
- B. the pressure below the nappe is negative
- C. the pressure above the nappe is atmospheric
- D. the pressure above the nappe is negative Discuss
Correct Answer: the pressure below the nappe is negative
- 10. One litre of water occupies a volume of
Options- A. 100 cm3
- B. 250 cm3
- C. 500 cm3
- D. 1000 cm3 Discuss
Correct Answer: 1000 cm3
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