Hydraulics and Fluid Mechanics problems
- 1. Laminar flow __________ place at very low velocities.
Options- A. takes
- B. does not take Discuss
Correct Answer: takes
- 2. Bulk modulus of a fluid __________ as the pressure increases.
Options- A. remains same
- B. decreases
- C. increases Discuss
Correct Answer: increases
- 3. 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
Correct Answer: all of the above
- 4. 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
Correct Answer: vortex flow
- 5. 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
Correct Answer: loss of head and discharge of both the pipes is same
- 6. In a footstep bearing, if the speed 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 Discuss
Correct Answer: double
- 7. The discharge over a triangular notch is
Options- A. inversely proportional to H3/2
- B. directly proportional to H3/2
- C. inversely proportional to H5/2
- D. directly proportional to H5/2 Discuss
Correct Answer: directly proportional to H5/2
- 8. If an incompressible liquid is continuously flowing through a pipe, the quantity of liquid passing per second is different at different sections.
Options- A. True
- B. False Discuss
Correct Answer: False
- 9. When the pipes are in series, the total head loss is equal to the sum of the head loss in each pipe.
Options- A. Yes
- B. No Discuss
Correct Answer: Yes
- 10. An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity)
Options- A. tan ? = a/g
- B. tan ? = 2 a/g
- C. tan ? = a/2g
- D. tan ? = a2/2g Discuss
Correct Answer: tan ? = a/g
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