Discussion
Home ‣ Mechanical Engineering ‣ Hydraulics and Fluid Mechanics Comments
- Question
The specific weight of sea water is __________ that of pure water.
Options- A. same as
- B. less than
- C. more than
- Correct Answer
- more than
- 1. The flow in a pipe is turbulent when Reynold number is
Options- A. less than 2000
- B. between 2000 and 2800
- C. more than 2800
- D. none of these Discuss
- 2. The force exerted by a moving fluid on an immersed body is directly proportional to the rate of change of momentum due to the presence of the body. This statement is called
Options- A. Newton's law of motion
- B. Newton's law of cooling
- C. Newton's law of viscosity
- D. Newton's law of resistance Discuss
- 3. An open tank containing liquid is moving with an acceleration on an inclined plane. The inclination of the free surface of the liquid will be __________ to the acceleration of the tank.
Options- A. equal to
- B. directly proportional
- C. inversely proportional Discuss
- 4. The discharge through a small rectangular orifice is given by (where Cd = Coefficient of discharge for the orifice, a = Cross-sectional area of the orifice, h = Height of the liquid above the centre of the orifice)
Options- A. Q = Cd x a x 2gh
- B.
- C.
- D.
Discuss
- 5. In a short cylindrical external mouthpiece, the vena contracta occurs at a distance __________ the diameter of the orifice from the outlet of orifice.
Options- A. equal to
- B. one-fourth
- C. one-third
- D. one-half Discuss
- 6. According to Pascal's law, the intensity of pressure at any point in a fluid at rest is the same in all directions.
Options- A. Agree
- B. Disagree Discuss
- 7. The intensity of pressure on an immersed surface __________ with the increase in depth.
Options- A. does not change
- B. increases
- C. decreases Discuss
- 8. In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.
Options- A. less than
- B. more than Discuss
- 9. The flow in a pipe is neither laminar nor turbulent when Reynold number is
Options- A. less than 2000
- B. between 2000 and 2800
- C. more than 2800
- D. none of these Discuss
- 10. With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will
Options- A. decrease
- B. increase
- C. remain unchanged
- D. depend upon the characteristics of liquid Discuss
Hydraulics and Fluid Mechanics problems
Search Results
Correct Answer: more than 2800
Correct Answer: Newton's law of resistance
Correct Answer: directly proportional
Correct Answer: Q = Cd x a x 2gh
Correct Answer: one-fourth
Correct Answer: Agree
Correct Answer: increases
Correct Answer: less than
Correct Answer: between 2000 and 2800
Correct Answer: decrease
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