IFSTA 11 static water supply

Question 1

what is the equation for determining maximum Lift

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Answer 1

1.13 x Hg

Question 2

net pump discharge pressure takes what factors into account

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Answer 2

Friction loss
pump discharge pressure
intake pressure correction

Question 3

what is the equation for determining pressure correction

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Answer 3

Lift x total intake hose friction loss
————————————————-
2.3

Question 4

what is the equation for determining net pump discharge pressure at draft
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Answer 4

PDP + intake pressure correction

Question 5

what is the equation for determining the adequacy of a small stream
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Answer 5

AxVx7.5

Question 6

The rule of thumb for evaluating a pond or small lake capacity is that for every foot of depth for an area of 1 acre provides how many GPM for how many hours
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Answer 6

1000 gpm

5 hours

Question 7

Floating strainers allow for drafting in water as shallow as how many feet
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Answer 7

1’

Question 8

which man-made static water supply source or underground storage receptacles that are usually found in areas not serviced by a hydrant system
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Answer 8

cistern

Question 9

which man-made static water supply source or man-made impoundments that have the same characteristics as a pond or small lake
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Answer 9

ground resevoir

Question 10

which man-made water supply source commonly found on large residential industrial and agricultural properties
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Answer 10

Private water storage tanks

Question 11

which man-made static water supply source transports water through open canals or portable pipes
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Answer 11

Agricultural irrigation systems

Question 12

what is the equation for determining the capacity of a square or rectangular pool
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Answer 12

LxWxDx7.5

Question 13

what is the equation for determining the capacity of a round pool
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Answer 13

3.14 x r^2 x d x 7.5

Question 14

define lift

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Answer 14

Difference in elevation between the surface of the static water supply in the center of the pump intake

Question 15

define theoretical lift

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Answer 15

a column of water may be lifted by atmospheric pressure in a true volume at sea level height equal to 33.9 feet

Question 16

For every 1000 feet of altitude atmospheric pressure decreases by approximately how many psi
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Answer 16

.5

Question 17

define maximum lift

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Answer 17

Maximum height to which any amount of water may be raised through a hard suction hose to a pump determined by the ability of the pump to create a vacuum most circumstances is approximately 25 feet

Question 18

define dependable lift

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Answer 18

height a can of water may be lifted and sufficient quantity To provide a reliable fire flow.

usually consider to be 14. 7 feet

Question 19

Under what conditions are pumping apparatus is rated for pump capacity

Answer 19

At draft minimum 10 feet of lift from the center of the pump to the surface of the water through 20 feet hard at 100% capacity

at 15’ - 70% of its capacity
at 20’ - 60% of its capacity

Question 20

cisterns typically range in sizes of what

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Answer 20

10,000 - 100,000 gallons

Question 21

ground reservoirs contain how many gallons

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Answer 21

millions