Discussion
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- Question
The ratio of the depth of flow to the hydraulic radius for the most economical trapezoidal section, in open channel flow is
Options- A. 0.5
- B. 1
- C. 1.5
- D. 2
- Correct Answer
- 2
- 1. Dimension of absolute viscosity is
Options- A. ML-1T-1
- B. MLT-1
- C. ML-1T
- D. MLT Discuss
- 2. The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a __________ fluid.
Options- A. Bingham
- B. Newtonion
- C. perfect
- D. none of these Discuss
- 3. The terminal velocity of a particle moving through a fluid varies as dpn. What is the value of n' for Newton's law regime?
Options- A. 0.5
- B. 1
- C. 1.5
- D. 3 Discuss
- 4. Laminar flow of a Newtonion fluid ceases to exist, when the Reynolds number exceeds
Options- A. 4000
- B. 2100
- C. 1500
- D. 3000 Discuss
- 5. Shear stress in a fluid flowing in a round pipe
Options- A. varies parabolically across the cross-section.
- B. remains constant over the cross-section.
- C. is zero at the centre and varies linearly with the radius.
- D. is zero at the wall and increases linearly to the centre. Discuss
- 6. Pick out the correct statement.
Options- A. A forced vortex occurs when fluid rotates as a solid about an axis.
- B. In laminar flow, Newton's law of viscosity does not apply.
- C. A free vortex occurs, when fluidrotates as a solid.
- D. In turbulent flow, there are neither cross-currents nor eddies. Discuss
- 7. Foot valves provided in pumps are __________ valves.
Options- A. relief
- B. three/four way
- C. pressure reducing
- D. directional control Discuss
- 8. The distribution given by microscopic analysis of powder is
Options- A. number
- B. length
- C. area
- D. volume Discuss
- 9. If dp is the equivalent diameter of a non-spherical particle, Vp its volume and sp its surface area, then its sphericity is ?s is defined by
Options- A. ?s = 6 Vp/dp sp
- B. ?s = Vp/dp sp
- C. ?s = 6 dp Sp/Vp
- D. ?s = dp Sp/Vp Discuss
- 10. Pick out the wrong statement.
Options- A. Close circuit grinding is more economical than open circuit grinding.
- B. Cod oil, beef tallow or aluminium stearates are used as grinding aids in cement 'industries'.
- C. The equipment used for the removal of traces of solids from a liquid is called a classifier.
- D. Size enlargement is a mechanical operation exemplified by medicinal tablet making. Discuss
Fluid Mechanics problems
Search Results
Correct Answer: ML-1T-1
Correct Answer: Newtonion
Correct Answer: 0.5
Correct Answer: 2100
Correct Answer: is zero at the centre and varies linearly with the radius.
Correct Answer: A forced vortex occurs when fluid rotates as a solid about an axis.
Correct Answer: directional control
Correct Answer: number
Correct Answer: ?s = 6 Vp/dp sp
Correct Answer: The equipment used for the removal of traces of solids from a liquid is called a classifier.
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