If the head of the water over the spillway is less than the design hea – McqOptions

MCQOPTIONS

1.	If the head of the water over the spillway is less than the design head, then ________________
A.	the pressure on the crest will be zero
B.	the pressure on the crest will be negative causing cavitation
C.	the discharge coefficient of the spillway is increased
D.	the discharge coefficient of the spillway will be reduced
Answer» E.

Discussion

No Comment Found

Related MCQs

_____________________ are suitable only for low spillways or weirs.
In the case of dam spillways, the approaching Froude number usually lies in the range of __________
The energy dissipation at the toe of the spillway is affected basically by the use of hydraulic jump in _______________________
The formation of hydraulic jump at the foot of a spillway is one of the common methods of energy dissipation because ______________________
The most ideal condition for energy dissipation in the design of spillways is the one when the tail-water rating curve coincides with the jump rating curve at all discharge.
For a saddle siphon, the maximum operative head is 4.53 m. The width and height of the throat of the siphon are 5 m and 2.25 m respectively. The coefficient of discharge is 0.90. How many units are required to pass a flood of 350 cumecs? (Assume g = 10 m/s2)
Standard USBR stilling basin-II is useful for energy dissipation at the bottom of the overflow structure, if the approaching Froude number is ________________
When the tail-water depths in the river downstream of a spillway are quite low such that the tail-water curve at all discharges lies below the post jump depth curve, then the energy dissipation can be affected best by ___________________
The allowable maximum negative head on an average is equal to __________
In a fixed roller of a spillway gate, the rollers are attached to the __________________