Pump Academy Flashcards
(63 cards)
Air dryer removes how much moisture and air from the system?
90%
Pump pressure at the foam eductor.
200 psi
Foam percentage for flammable liquids
3%
Foam percentage for polar solvents
6%
Mode for drafting
RPM while priming
Pressure while pumping
Why in RPM mode while establishing a draft?
Prevent anti-cavitation feature from activating while in Pressure mode
When should relay operations be considered
Whenever NFF exceeds 300 GPM
Relay Formula
EP = 20 psi +/- FL
When relay pumping, until friction loss is calculated, pump 4” and 5” at what pressure?
4” at 100 psi
5” at 50 psi
What is tandem pumping used for?
To overcome elevation
What percentage of braking power comes from front brakes?
80%
When do you prime?
Only prime if pumping from a tank. No need to prime if getting a supply.
Specific heat
The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.
Specific gravity
Specific gravity is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume.
Why is the intake gauge also called a compound gauge?
Because it reads in psi if positive and inches of mercury if negative.
How to calculate lift in feet from inches of mercury
Lift = 1.13 x inches of Mercury
Pump Capacity at 150 psi
100%
Pump Capacity at 200 psi
70%
Pump Capacity at 250 psi
50%
BTU
The amount of heat needed to raise the temperature of 1 gallon of water 1 degree
1 cubic foot of water weighs how much?
62.4 lbs
1 cubic foot of water contains how many gallons of water?
7.481 gallons
1 gallon of fresh water weighs how many pounds?
8.34 lbs
NFF formula (amount needed to control fire within 1 minute)
GPM = LxW / 3 x % involvement
