Hydraulics and Fluid Mechanics problems
- 1. A channel is said to be of most economical cross-section, if
Options- A. it gives maximum discharge for a given cross-sectional area and bed slope
- B. it has minimum wetted perimeter
- C. it involves lesser excavation for the designed amount of discharge
- D. all of the above Discuss
Correct Answer: all of the above
- 2. The purpose of a surge tank is
Options- A. to control the pressure variations due to rapid changes in the pipe line flow
- B. to eliminate water hammer possibilities
- C. to regulate flow of water to turbines by providing necessary retarding head of water
- D. all of the above Discuss
Correct Answer: all of the above
- 3. In two dimensional flow, the flow does not take place in a curve.
Options- A. True
- B. False Discuss
Correct Answer: False
- 4. The discharge through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.
Options- A. 0.34 times
- B. 0.67 times
- C. 0.81 times
- D. 0.95 times Discuss
Correct Answer: 0.95 times
- 5. The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
- 6. In an internal mouthpiece, if the jet after contraction expands and fills up the whole mouthpiece, then the mouthpiece is said to be running free.
Options- A. True
- B. False Discuss
Correct Answer: False
- 7. The specific gravity of an oil whose specific weight is 7.85 kN/m3, is
Options- A. 0.8
- B. 1
- C. 1.2
- D. 1.6 Discuss
Correct Answer: 0.8
- 8. The coefficient of discharge is the ratio of dieoretical discharge to the actual discharge through an orifice.
Options- A. True
- B. False Discuss
Correct Answer: False
- 9. When an internal mouthpiece is running full, the discharge through the mouthpiece is twice the discharge when it is running free.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Incorrect
- 10. A pitot tube is used to measure the
Options- A. velocity of flow at the required point in a pipe
- B. pressure difference between two points in a pipe
- C. total pressure of liquid flowing in a pipe
- D. discharge through a pipe Discuss
Correct Answer: velocity of flow at the required point in a pipe
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