Chapter 11 Flashcards
What is lift?
The difference between in elevation between the surface of the static water supply and the center of the pump intake.
What is the formula for determining maximum lift?
L=1.13 Hg
So for example 14 Hg inches of mercury would be L=1.13(14)=15.82ft
Dependable lift is usually considered how many feet?
14.7 ft
At 15 ft of lift the pump is usually able to deliver what percent of its capacity?
About 70%
At 20 ft the pump is able to deliver what percent of its capacity?
About 60%
What is the pressure correction formula?
PC= Lift + total intake hose friction loss/ 2.3
What is the formula for net pump
Discharge pressure at draft?
NPDP draft= PDP + PC
Pc is intake pressure correction
What is a cistern?
A water storage receptacle that is usually underground and may be supplied by a well or rainwater runoff
How much water do cisterns normally hold?
10,000-100,000 typically
How much water do private water storage tanks hold typically?
Several hundred to tens of thousands of gallons of water, they may be stored at ground level or elevated
How much water do ground reservoirs normally hold?
Typically contain many millions of gallons of water. May be more accessible than natural bodies of water because of their installation at a working facility.
What is the formula for a square/rectangle pool capacity?
C= 7.5 x L x W x D
What is the formula for a round pool capacity?
C= 7.5 x 3.14 (pi) x r^2 squared x D
D= depth
