Chapter 11 Static Water Supply Sources Flashcards
The maximum height of lift when drafting is affected by….
The angle of the intake hose
The amount of negative pressure the priming device can produce
The existing atmospheric pressure
For every 1000 feet of altitude, atmospheric pressure reduces by…
.5 psi
What is the formula for determining maximum lift
L= 1.13 Hg
L is height of lift in feet
1.13 is a constant
Hg is inches of mercury
How many feet (at least) of dependable lift should a typical pumper have if it’s working properly?
14.7 feet
Name the pressure correction formula
PC= lift + total intake hose friction loss/2.3
Pc is pressure correction in psi
Lift is lift required in feet
Floating strainers may be used for drafting water as shallow as?
1 foot
What could you used to damn up water from a small stream?
A ladder and salvage cover
How many gallons can a cistern hold up to?
It’s connected to storm drains and can hold between 10,000-100,000 gallons
Name the formula for determining the capacity of a SQUARE swimming pool
C=7.5LW*D
C is capacity in gallons
7.5 is # of gallons per cubic foot
Length
Width
Average depth
Round pool capacity formula
C= 7.5 * pie * r^2 * D
r is the radius in feet