Hydraulics and Fluid Mechanics problems
- 1. The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
- 2. The difference between the notch and weir is that the notch is of bigger size and the weir is of a smaller size.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Disagree
- 3. When a tank containing liquid moves with an acceleration in the horizontal direction, then the free surface of the liquid
Options- A. remains horizontal
- B. becomes curved
- C. falls on the front end
- D. falls on the back end Discuss
Correct Answer: falls on the front end
- 4. Re-entrant or Borda's mouthpiece is an __________ mouthpiece.
Options- A. internal
- B. external Discuss
Correct Answer: internal
- 5. The ratio of velocity of fluid in an undisturbed stream to the velocity of sound wave is known as Mach number.
Options- A. Yes
- B. No Discuss
Correct Answer: Yes
- 6. The specific weight of water in S.I. units is taken as
Options- A. 9.81 kN/m3
- B. 9.81 x 103 kN/m3
- C. 9.81 x 10-6 N/mm3
- D. any one of these Discuss
Correct Answer: 9.81 kN/m3
- 7. The density of air is same at different heights.
Options- A. Correct.
- B. Incorrect Discuss
Correct Answer: Incorrect
- 8. The ratio of the inertia force to the surface tension force is called Weber's number.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 9. The rise, in water level, which occurs during the transformation of the unstable shooting flow to the stable streaming flow is called hydraulic jump.
Options- A. Yes
- B. No Discuss
Correct Answer: Yes
- 10. If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, The body is said to be in __________ equilibrium.
Options- A. neutral
- B. stable
- C. unstable Discuss
Correct Answer: neutral
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