Hydraulics problems
- 1. An ideal fluid
Options- A. is frictionless and incompressible
- B. obeys Newton's law of velocity
- C. is similar to gas
- D. is very viscous. Discuss
Correct Answer: is frictionless and incompressible
- 2. With a clinging nappe of a weir, the excess discharge, is
Options- A. 6% to 7%
- B. 8% to 10%
- C. 18% to 20%
- D. 25% to 30%
- E. 30% to 40%. Discuss
Correct Answer: 25% to 30%
- 3. In case of laminar flow through a circular pipe,
Options- A. momentum correction factor is 1.33
- B. energy correction factor is 2.00
- C. both (a) and (b)
- D. Neither (a) nor (b). Discuss
Correct Answer: both (a) and (b)
- 4. A rise or fall of liquid in a glass tube of a very small diameter when dipped is
Options- A. directly proportional to the force per unit length of periphery
- B. direcly proportional to the sine of the angle of contact
- C. directly proportional to the specific weight of liquid
- D. inversely proportional to the diameter of the glass tube. Discuss
Correct Answer: directly proportional to the specific weight of liquid
- 5. When the whole fluid mass rotates either due to fluid pressure or gravity or rotation previously imparted, the motion is known as
Options- A. free vortex
- B. forced vortex
- C. non-potential vortex
- D. rotational vortex. Discuss
Correct Answer: free vortex
- 6. The depth of the centre of pressure on a vertical rectangular gate (4 m wide, 3 m high) with water upto top surface, is
Options- A. 1.0 m
- B. 1.5 m
- C. 2.0 m
- D. 2.5 m. Discuss
Correct Answer: 2.0 m
- 7. The pressure less than atmospheric , pressure, is known
Options- A. suction pressure
- B. vacuum pressure
- C. negative gauge pressure
- D. all the above. Discuss
Correct Answer: all the above.
- 8. Discharge through a totally submerged orifice, is directly proportional to
Options- A. difference in elevation of water surfaces
- B. square root of the difference in elevation of water surface
- C. square root of the opening
- D. reciprocal of the area of the opening
- E. none of these. Discuss
Correct Answer: square root of the difference in elevation of water surface
- 9. The dimensions MLT-2 refers to
Options- A. specific weight
- B. force
- C. discharge
- D. none of these. Discuss
Correct Answer: force
- 10. Capillary rise of water is
Options- A. directly proportional to surface tension
- B. inversely proportional to water density
- C. inversely proportional to diameter of the tube
- D. All of these. Discuss
Correct Answer: All of these.
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