Hydraulics problems
- 1. If v1 and v2 are the velocities of flow before and after sudden enlargement in a pipe, the head loss given by Carnot and Borda equation, is
Options- A. (v22 - v12)/2g
- B. (v1 - v2)2/2g
- C. (v2 - v1)2/2g
- D. (v1 + v2)2/2g. Discuss
Correct Answer: (v1 - v2)2/2g
- 2. Pick up the correct statement from the following :
Options- A. In incompressible flow the density of a fluid remains constant
- B. In compressible flow, the density of a fluid changes from point to point
- C. In uniform flow, the velocity of a fluid does not change with respect to length of flow direction
- D. All the above. Discuss
Correct Answer: All the above.
- 3. Water flows through a convergent mouthpiece of diameter 4 cm at convergence under a head of 3 metres. If the maximum vacuum pressure is 9 metres of water, the maximum diameter of divergence, to aviod separation of flow, is
Options- A. 4 cm
- B. 6 cm
- C. 2 cm
- D. 23 cm. Discuss
Correct Answer: 2 cm
- 4. A spherical load 900 kg is rolled through 9.8 m across the deck of a ship weighing 10, 000 kg. If the metacentric height of the ship is 5 metres, the angle of heel, is
Options- A. 10° 5'
- B. 10° 10'
- C. 10° 15'
- D. 10° 20' Discuss
Correct Answer: 10° 15'
- 5. The value of kinetic energy correction factor (a) for a laminar flow through a circular pipe, is
Options- A. 0.5
- B. 1.0
- C. l.5
- D. 2.0
- E. 2.5 Discuss
Correct Answer: 2.0
- 6. If H is height of the liquid above the sill, the effect of end contractions, according to Francis formula, is
Options- A. 0.1 H
- B. 0.2 H
- C. 0.3 H
- D. 0.4 H
- E. 0.5 H. Discuss
Correct Answer: 0.1 H
- 7. If H is the difference of liquid levels on two sides of an orifice (width b, depth d), the discharge through the orifice will be
Options- A. Cdbd22gH
- B. Cdb2d2gH
- C. Cdbd2gh
- D. Cdbd.2g H1/2. Discuss
Correct Answer: Cdbd2gh
- 8. A triangular notch is preferred to a rectangular notch because
Options- A. only one reading is required
- B. its formula is simple to remember
- C. it gives more accurate results for low discharge
- D. it measures a wide range of flows accurately
- E. all the above. Discuss
Correct Answer: all the above.
- 9. For steady flow in open channels, which one of the following does not change :
Options- A. depth of flow
- B. velocity of flow
- C. rate of flow
- D. All of these. Discuss
Correct Answer: All of these.
- 10. Equation of continuity of fluids is applicable only if
Options- A. flow is steady
- B. flow is compressive
- C. flow is one dimensional
- D. velocity is uniform over the cross-sections
- E. all the above. Discuss
Correct Answer: all the above.
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