Hydraulics and Fluid Mechanics problems
- 1. 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
Correct Answer: concave
- 2. The density of a liquid in kg/m3 is numerically equal to its specific gravity.
Options- A. True
- B. False Discuss
Correct Answer: True
- 3. 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
Correct Answer: increase in pressure to the volumetric strain
- 4. 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
Correct Answer: gravity force
- 5. An orifice is said to be large, if
Options- A. the size of orifice is large
- B. the velocity of flow is large
- C. the available head of liquid is more than 5 times the height of orifice
- D. the available head of liquid is less than 5 times the height of orifice Discuss
Correct Answer: the available head of liquid is less than 5 times the height of orifice
- 6. A structure used to dam up a stream or river over which the water flows is called
Options- A. orifice
- B. notch
- C. weir
- D. dam Discuss
Correct Answer: weir
- 7. Select the wrong statement
Options- A. An equivalent pipe is treated as an ordinary pipe for all calculations
- B. The length of an equivalent pipe is equal to that of a compound pipe
- C. The discharge through an equivalent pipe is equal to that of a compound pipe
- D. The diameter of an equivalent pipe is equal to that of a compound pipe Discuss
Correct Answer: The diameter of an equivalent pipe is equal to that of a compound pipe
- 8. When a liquid is flowing through a pipe, the velocity of the liquid is
Options- A. maximum at the centre and minimum near the walls
- B. minimum at the centre and maximum near the walls
- C. zero at the centre and maximum near the walls
- D. maximum at the centre and zero near the walls Discuss
Correct Answer: maximum at the centre and minimum near the walls
- 9. The pressure of fluid due to hammer blow is
Options- A. directly proportional to density of fluid
- B. inversely proportional to density of fluid
- C. directly proportional to (density)1/2 of fluid
- D. inversely proportional to (density)1/2 of fluid Discuss
Correct Answer: directly proportional to (density)1/2 of fluid
- 10. Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)
Options- A. Cc x Cv
- B. Cc x Cr
- C. Cv x Cr
- D. Cc/Cr Discuss
Correct Answer: Cc x Cv
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