Hydraulics and Fluid Mechanics problems
- 1. A nozzle is generally made of
Options- A. cylindrical shape
- B. convergent shape
- C. divergent shape
- D. convergent-divergent shape Discuss
Correct Answer: convergent shape
- 2. According to Darcy's formula, the loss of head due to friction in the pipe is (where f = Darcy's coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe)
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
- 3. The separation of flow occurs when the hydrodynamic boundary layer thickness is reduced to zero.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
- 4. When the flow in an open channel is gradually varied, the flow is said to be
Options- A. steady uniform flow
- B. steady non-uniform flow
- C. unsteady uniform flow
- D. unsteady non-uniform flow Discuss
Correct Answer: steady non-uniform flow
- 5. The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.
Options- A. equal to
- B. one-half
- C. three fourth
- D. double Discuss
Correct Answer: double
- 6. The pressure at a stagnation point is always low.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Disagree
- 7. The divergent portion of a venturimeter is made longer than convergent portion in order to
Options- A. avoid the tendency of breaking away the stream of liquid
- B. to minimise frictional losses
- C. both (a) and (b)
- D. none of these Discuss
Correct Answer: both (a) and (b)
- 8. The quantity of a liquid flowing per second through a section of a pipe or a channel is called discharge and is measured in cumecs (m3/s).
Options- A. True
- B. False Discuss
Correct Answer: True
- 9. The total head of a liquid particle in motion is equal to
Options- A. pressure head + kinetic head + potential head
- B. pressure head - (kinetic head + potential head)
- C. potential head - (pressure head + kinetic head)
- D. kinetic head - (pressure head + potential head) Discuss
Correct Answer: pressure head + kinetic head + potential head
- 10. The force of buoyancy is always __________ the weight of the liquid displaced by the body.
Options- A. equal to
- B. less than
- C. more than Discuss
Correct Answer: equal to
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