Mechanical Engineering - Hydraulics and Fluid Mechanics
Exercise :: Hydraulics and Fluid Mechanics - Section 4
| 31. |
The velocity at which the flow changes from laminar flow to turbulent flow is called |
| A. |
critical velocity | | B. |
velocity of approach | | C. |
sub-sonic velocity | | D. |
super-sonic velocity |
Answer: Option A
Explanation:
|
| 32. |
The discharge through a channel of trapezoidal section is maximum when |
| A. |
width of channel at the top is equal to twice the width at the bottom | | B. |
depth of channel is equal to the width at the bottom | | C. |
the sloping side is equal to half the width at the top | | D. |
the sloping side is equal to the width at the bottom |
Answer: Option C
Explanation:
|
| 33. |
The vacuum pressure is always the negative gauge pressure. |
Answer: Option A
Explanation:
|
| 34. |
The value of coefficient of discharge is __________ the value of coefficient of velocity. |
| A. |
less than | | B. |
same as | | C. |
more than |
Answer: Option A
Explanation:
|
| 35. |
When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as |
| A. |
narrow-crested weir | | B. |
broad-crested weir | | C. |
Ogee weir | | D. |
submerged weir |
Answer: Option D
Explanation:
|
