Hydraulics and Fluid Mechanics problems
- 1. The torque required to overcome viscous resistance of a footstep bearing is (where ? = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft, and t = Thickness of the oil film)
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
- 2. A closed tank is completely filled with an oil. If it is made to move with a horizontal acceleration, then the pressure at the back end will be more than that at the front end.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 3. The pressure of the liquid flowing through the divergent portion of a venturimeter
Options- A. remains constant
- B. increases
- C. decreases
- D. depends upon mass of liquid Discuss
Correct Answer: decreases
- 4. When the Mach number is between __________ the flow is called super-sonic flow.
Options- A. 1 and 2.5
- B. 2.5 and 4
- C. 4 and 6
- D. 1 and 6 Discuss
Correct Answer: 1 and 6
- 5. A manometer is used to measure
Options- A. atmospneric pressure
- B. pressure in pipes and channels
- C. pressure in venturimeter
- D. difference of pressures between two points in a pipe Discuss
Correct Answer: pressure in pipes and channels
- 6. The product of mass and accelaration of flowing liquid is called
Options- A. inertia force
- B. viscous force
- C. gravity force
- D. pressure force Discuss
Correct Answer: inertia force
- 7. A notch is used to measure __________ of liquids.
Options- A. pressure
- B. discharge
- C. velocity
- D. volume Discuss
Correct Answer: discharge
- 8. The metacentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is
Options- A. 4.1 s
- B. 5.2 s
- C. 10.4 s
- D. 14.1 s Discuss
Correct Answer: 10.4 s
- 9. The mass of 2.5 m3 of a certain liquid is 2 tonnes. Its mass density is
Options- A. 200 kg/m3
- B. 400 kg/m3
- C. 600 kg/m3
- D. 800 kg/m3 Discuss
Correct Answer: 800 kg/m3
- 10. The discharge through a wholly drowned orifice is given by (where H1 = Height of water (on the upstream side) above the top of the orifice, H2 = Height of water (on the downstream side) above the bottom of the orifice, and H = Difference between two water levels on either side of the orifice)
Options- A. Q = Cd x bH1 2gh
- B. Q = Cd x bH2 2gh
- C. Q = Cd x b ( H2 - H1 ) 2gh
- D. Q = Cd x bH 2gh Discuss
Correct Answer: Q = Cd x b ( H2 - H1 ) 2gh
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