Mechanical Engineering - Hydraulics and Fluid Mechanics
Exercise :: Hydraulics and Fluid Mechanics - Section 8
| 31. |
The velocity of flow is same at all points in the cross-section of a channel. |
Answer: Option B
Explanation:
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| 32. |
The length of a liquid stream while flowing over a weir __________ at the ends of the sill. |
| A. |
expands | | B. |
does not change | | C. |
contracts |
Answer: Option C
Explanation:
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| 33. |
Select the wrong statement |
| 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 |
Answer: Option D
Explanation:
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| 34. |
The velocity through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel. |
| A. |
0.34 times | | B. |
0.67 times | | C. |
0.81 times | | D. |
0.95 times |
Answer: Option C
Explanation:
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| 35. |
In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be |
| A. |
double | | B. |
four times | | C. |
eight times | | D. |
sixteen times |
Answer: Option D
Explanation:
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