Hydraulics and Fluid Mechanics problems
- 1. The pressure at a point 4 m below the free surface of water is
Options- A. 19.24 kPa
- B. 29.24 kPa
- C. 39.24 kPa
- D. 49.24 kPa Discuss
Correct Answer: 39.24 kPa
- 2. An average value of coefficient of velocity is
Options- A. 0.62
- B. 0.76
- C. 0.84
- D. 0.97 Discuss
Correct Answer: 0.97
- 3. The velocity of flow is same at all points in the cross-section of a channel.
Options- A. True
- B. False Discuss
Correct Answer: False
- 4. According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed)
Options- A. A m x i
- B. C m x i
- C. AC m x i
- D. mi A x C Discuss
Correct Answer: AC m x i
- 5. Surface tension force is the product of surface tension per unit length and cross-sectional area of flow.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Incorrect
- 6. The coefficient of discharge for an external mouthpiece depends upon
Options- A. velocity of liquid
- B. pressure of liquid
- C. area of mouthpiece
- D. length of mouthpiece Discuss
Correct Answer: length of mouthpiece
- 7. A vessel of 4 m3 contains an oil which weighs 30 kN. The specific weight of the oil is
Options- A. 4.5 kN/m3
- B. 6 kN/m3
- C. 7.5 kN/m3
- D. 10 kN/m3 Discuss
Correct Answer: 7.5 kN/m3
- 8. A flow in which each liquid particle has a definite path, and the paths of individual particles do not cross each other, is called
Options- A. steady flow
- B. uniform flow
- C. streamline flow
- D. turbulent flow Discuss
Correct Answer: streamline flow
- 9. In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be
Options- A. double
- B. four times
- C. eight times
- D. sixteen times Discuss
Correct Answer: sixteen times
- 10. The velocity through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.
Options- A. 0.34 times
- B. 0.67 times
- C. 0.81 times
- D. 0.95 times Discuss
Correct Answer: 0.81 times
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