8. Fire ground hydraulic calculations Flashcards
1
Q
Flow meters must display flow in increments of __ GPM or less
A
10 gpm
2
Q
$$$
With proper calibration, a flowmeter in good working order should be accurate to a tolerance of plus or minus __%
A
3%
3
Q
$$$
Each discharge equipped with a flowmeter must have a digital readout display mounted within __ inches of the control valve for that discharge.
A
6 inches
4
Q
The intake pressure reading cannot be allowed to drop below __ psi.
A
20 psi
5
Q
Condensed Q formula
FL=
A
FL=Q^2
6
Q
$$$
All though sufficient for many fire ground calculations, the friction loss results will be __% greater than when using the FL=CQ^2L formula.
A
20%
However, in a hose lay of 1000 feet of 3 inch hose, the difference may be as great as 50 psi
