Hydraulics problems
- 1. If the pressure at the inlet of a pipe is 90 kg/cm2 and pressure drop over the pipe line is 10 kg/cm2, the efficiency of transmission, is
Options- A. 66.6%
- B. 77.7%
- C. 55.5%
- D. 88.8%. Discuss
Correct Answer: 88.8%.
- 2. Centre of buoyancy is
Options- A. centroid of the floating body
- B. centroid of the fluid displaced
- C. centre of pressure of the displaced liquid
- D. none of these. Discuss
Correct Answer: centroid of the fluid displaced
- 3. Total energy line is
Options- A. pressure head
- B. datum head
- C. kinetic head
- D. All the above. Discuss
Correct Answer: All the above.
- 4. A body of dimensions 1.5 m x 1.0 m x 2 m weighs 3000 kg in water. Its specific gravity is
Options- A. 0.8
- B. 0.9
- C. 1.0
- D. 1.1 Discuss
Correct Answer: 1.1
- 5. An orifice is called a large orifice if water head, is
Options- A. twice the diameter of the orifice
- B. thrice the diameter of the orifice
- C. four times the diameter of the orifice
- D. five times the diameter of the orifice. Discuss
Correct Answer: five times the diameter of the orifice.
- 6. In a two dimensional flow if the components of the velocity are u = ax ; v = by, the point where no motion occurs, is known as
Options- A. critical point
- B. neutral point
- C. stagnation point
- D. stationary point
- E. none of these. Discuss
Correct Answer: stagnation point
- 7. The unit of the viscosity is
Options- A. kg sec/m2
- B. Newton sec per m2
- C. Newton-sec2/m3
- D. m2 per sec. Discuss
Correct Answer: Newton sec per m2
- 8. In steady flow, which one of the following changes with time
Options- A. velocity
- B. pressure
- C. density
- D. none of these. Discuss
Correct Answer: none of these.
- 9. A stepped notch is a combination of
Options- A. rectangular notches of different sizes
- B. triangular notches of different sizes
- C. rectangular and triangular notches
- D. all the above. Discuss
Correct Answer: rectangular notches of different sizes
- 10. For a most economical trapezoidal open channel, the half of the top width must be equal to
Options- A. the bed width
- B. one sloping side
- C. the depth of flow
- D. None of these. Discuss
Correct Answer: one sloping side
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