Hydraulics and Fluid Mechanics problems
- 1. The hydraulic gradient line may be above or below the centre line of the pipe.
Options- A. True
- B. False Discuss
Correct Answer: False
- 2. A weir is usually made of masonry or concrete.
Options- A. Yes
- B. No Discuss
Correct Answer: Yes
- 3. The viscosity of water is __________ than that of mercury.
Options- A. higher
- B. lower Discuss
Correct Answer: higher
- 4. The atmospheric pressure at sea level is
Options- A. 103 kN/m2
- B. 10.3 m of water
- C. 760 mm of mercury
- D. all of these Discuss
Correct Answer: all of these
- 5. The discharge over a rectangular weir, considering the velocity of approach, is (where H1 = Total height of water above the weir = H + Ha H = Height of water, over the crest of the weir, and Ha = Height of water, due to velocity of approach)
Options- A.
Cd x L2g [H1 - Ha] - B. Cd x L2g [H13/2 - Ha3/2]
- C. Cd x L2g [H12 - Ha2]
- D. Cd x L2g [H15/2 - Ha5/2]
Discuss
Correct Answer:
Cd x L2g [H13/2 - Ha3/2] - 6. The specific gravity has no units.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
- 7. The shear stress-strain graph for a newtonian fluid is a
Options- A. straight line
- B. parabolic curve
- C. hyperbolic curve
- D. elliptical Discuss
Correct Answer: straight line
- 8. If a pitot tube is placed with its nose upstream, downstream or sideways, the reading will be the same in every case.
Options- A. True
- B. False Discuss
Correct Answer: False
- 9. The loss of pressure head in case of laminar flow is proportional to
Options- A. velocity
- B. (velocity)2
- C. (velocity)3
- D. (velocity)4 Discuss
Correct Answer: velocity
- 10. Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, at right angles to the direction of flow of the liquid is known as lift.
Options- A. True
- B. False Discuss
Correct Answer: True
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