Chapter 11 Flashcards
Lift is defined as the difference between elevation and the _________ of the pump
center
Static water sources include lakes, rivers, oceans, pools, cisterns and portable tanks
no answer
In order to create draft you must exhaust air from the _______ and the _______
intake hose and fire pump
When drafting, pressure in the intake hose and the _____ drops lower than __________.
pump
atmospheric pressure
drafting and priming are created by ______ vacuum. It is impossible to create ______ vacuum in a fire pump
partial vacuum
total vacuum
because pressure in the intake hose and pump lower than opuside it, water is forced in and continues to rise until the pump is full or the _____and _______ equals atmpospheric pressure.
intake hose and pump
For every 1,000 feet of altitude, the atmospheric pressure decreases by approximately _____psi
.5
Total vacuum or theoretic lift says that water can be lifted a total of _______ feet
33.9 feet
Maximum lift for fire pumpers is usually around ____feet
25
L= ___feet (Hg)
Hg = millimeters of mercury
L=1.13 feet
The 3 lifts are ______lift, ______lift and ____lift
Theoretic lift 33.9 feet
Maximum lift 25 feet on fire pumps
dependable lift: height a column of water can be lifted in suficient quantity to provide addiquate fire streams.
All pumper should have a dependable lift of _____feet
14.7 feet
A pumper should have 100% capability of the pump at ____feet of lift.
At ___feet of lift the pump has 70% of rated capacity
At ____feet of lift the pump is at 60%
10 feet
15 feet
20 feet
When at draft, net pump discharge pressure is the sum of the pump discharge pressure and intake pressure correction that takes into account the friction loss in the _____hose and the _____ of the lift
intake hose
height of lift
Floating pumps can maintain a flow of _____gpm
500