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- Question
A flow in which the viscosity of fluid is dominating over the inertia force is called
Options- A. steady flow
- B. unsteady flow
- C. laminar flow
- D. turbulent flow
- Correct Answer
- laminar flow
- 1. The velocity corresponding to Reynold number of 2800, is called
Options- A. sub-sonic velocity
- B. super-sonic velocity
- C. lower critical velocity
- D. higher critical velocity Discuss
- 2. The unit of dynamic viscosity in S.I. units is
Options- A. N-m/s2
- B. N-s/m2
- C. poise
- D. stoke Discuss
- 3. The viscosity of a liquid is due to cohesion of its particles.
Options- A. Correct
- B. Incorrect Discuss
- 4. An air vessel is provided at the summit in a syphon to
Options- A. avoid interruption in the flow
- B. increase discharge
- C. increase velocity
- D. maintain pressure difference Discuss
- 5. A compound pipe of diameter d1, d2 and d3 having lengths l1, l2 and l3 is to be replaced by an equivalent pipe of uniform diameter d and of the same length (l) as that of the compound pipe. The size of the equivalent pipe is given by
Options- A.
- B.
- C.
- D.
Discuss
- 6. Laminar flow __________ place at very low velocities.
Options- A. takes
- B. does not take Discuss
- 7. Bulk modulus of a fluid __________ as the pressure increases.
Options- A. remains same
- B. decreases
- C. increases Discuss
- 8. The Newton's law of resistance is based on the assumption that the
Options- A. planes of the body are completely smooth
- B. space around the body is completely filled with the fluid
- C. fluid particles do not exert any influence on one another
- D. all of the above Discuss
- 9. When a cylindrical vessel, containing some liquid, is rotated about its vertical axis, the liquid surface is depressed down at the axis of its rotation and rises up near the walls of the vessel on all sides. This type of flow is known as
Options- A. steady flow
- B. turbulent flow
- C. vortex flow
- D. uniform flow Discuss
- 10. A compound pipe is required to be replaced by a new pipe. The two pipes are said to be equivalent, if
Options- A. length of both the pipes is same
- B. diameter of both the pipes is same
- C. loss of head and discharge of both the pipes is same
- D. loss of head and velocity of flow in both the pipes is same Discuss
Hydraulics and Fluid Mechanics problems
Search Results
Correct Answer: higher critical velocity
Correct Answer: N-s/m2
Correct Answer: Correct
Correct Answer: avoid interruption in the flow
Correct Answer:
Correct Answer: takes
Correct Answer: increases
Correct Answer: all of the above
Correct Answer: vortex flow
Correct Answer: loss of head and discharge of both the pipes is same
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