Discussion
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- Question
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
- Correct Answer
- sixteen times
- 1. 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
- 2. 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
- 3. 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
- 4. Surface tension force is the product of surface tension per unit length and cross-sectional area of flow.
Options- A. Correct
- B. Incorrect Discuss
- 5. 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
- 6. 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
- 7. When a tube of smaller diameter is dipped in water, the water rises in the tube with an upward __________ surface.
Options- A. concave
- B. convex Discuss
- 8. The density of a liquid in kg/m3 is numerically equal to its specific gravity.
Options- A. True
- B. False Discuss
- 9. Bulk modulus of a fluid is the ratio of
Options- A. shear stress to shear strain
- B. increase in volume to the viscosity of fluid
- C. increase in pressure to the volumetric strain
- D. critical velocity to the viscosity of fluid Discuss
- 10. Froude's number is the ratio of inertia force to
Options- A. pressure force
- B. elastic force
- C. gravity force
- D. surface tension force Discuss
Hydraulics and Fluid Mechanics problems
Search Results
Correct Answer: streamline flow
Correct Answer: 7.5 kN/m3
Correct Answer: length of mouthpiece
Correct Answer: Incorrect
Correct Answer: AC m x i
Correct Answer: 0.81 times
Correct Answer: concave
Correct Answer: True
Correct Answer: increase in pressure to the volumetric strain
Correct Answer: gravity force
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