Hydraulics and Fluid Mechanics problems
- 1. Reynold's number is the ratio of inertia force to
Options- A. pressure force
- B. elastic force
- C. gravity force
- D. viscous force Discuss
Correct Answer: viscous force
- 2. The volume per unit mass of a liquid is called specific volume.
Options- A. Yes
- B. No Discuss
Correct Answer: Yes
- 3. If a body floating in a liquid does not return back to its original position, and heels farther "away when given a small angular displacement, the body is said to be in neutral equilibrium.
Options- A. Yes
- B. No Discuss
Correct Answer: No
- 4. The length of the divergent cone in a venturimeter is __________ that of the convergent cone.
Options- A. equal to
- B. double
- C. three to four times
- D. five to six times Discuss
Correct Answer: three to four times
- 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
Correct Answer:
- 6. 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
Correct Answer: avoid interruption in the flow
- 7. The viscosity of a liquid is due to cohesion of its particles.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 8. The unit of dynamic viscosity in S.I. units is
Options- A. N-m/s2
- B. N-s/m2
- C. poise
- D. stoke Discuss
Correct Answer: N-s/m2
- 9. 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
Correct Answer: higher critical velocity
- 10. 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 Discuss
Correct Answer: laminar flow
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