USBR ch 10

Question 1

Outlet works are classified according to their purpose, their physical and structural arrangement or their hydraulic operation

T or F

Answer 1

True

Question 2

The outlet works position in relation to the reservoir storage level is so important to attain the required elevation capacity

T or F

Answer 2

False

Question 3

What should control devices selection of outlet works arrangement be based upon?

a) size
b) length
c) commercially available gates and valves or relatively simple gate design where possible
d) none above

Answer 3

c) commercially available gates and valves or relatively simple gate design where possible

Question 4

If a closed circuit is to be provided and foundation conditions are not suitable for tunnel, or if the required size of the waterway is too small to justify the minimum sized tunnel, a cut-and-cover conduit should be used

T or F

Answer 4

True

Question 5

An intake structure may be either submerged or extended in the form of a tower above the maximum surface water level when the controls are placed at the headworks

T or F

Answer 5

False

Question 6

Where the trashracks are inaccessible for cleaning, the velocity through the racks ordinarily should not exceed 2 feet per second. If a trashrack is accessible for cleaning, what can the feet per second be through the trashrack?

a) up to 10 feet per second
b) up to 15 feet per second
c) up to 5 feet per second
d) up to 20 feet per second

Answer 6

c) up to 5 feet per second

Question 7

When open-channel outlet flow is controlled by partly open surface gates, r where top-seal radial gates or submerged side gates control the flow, what is the formula to calculate this flow?

a) Q = CRF
b) Q = E/R
c) Q = CDL (2gh)^1/2
d) none above

Answer 7

c) Q = CDL (2gh)^1/2