Hydraulics Flashcards
1
Q
Conversion factors
A
3/4 = 25 1 = 9 1 1/2 = 3.6 1 3/4 = 2 3 = .67 (2/3) 3 1/2 = .4 (4/10) 4 = .25 (1/4)
2
Q
Maximum pump pressures
A
booster line- 400 single jacket/ wildland- 200 double jacket- 300 double jacket high pressure- 600 Hard suction- 150
3
Q
sprinkler PSI and gpm
A
25psi / 30GPM
4
Q
Appliance loss PSI?
A
15 for deluge or monitor
25psi for standpipe, ladder pipe
5
Q
wildland tip sizes and gpm
A
3/16” - 7
1/4” - 13
3/8” - 30
6
Q
Hand line tip sizes and gpm
A
1/2 - 50 5/8 - 80 3/4 - 120 7/8 - 160 1 - 210 1 1/8 - 270
7
Q
Master streams size and gpm
A
1 1/8 - 300 1 1/4 - 400 1 3/8- 500 1 1/2 - 600 1 3/4 - 800 2 - 1100
8
Q
Immediate pump pressure for hand lines?
A
gravity gain/loss plus nozzle pressure
9
Q
rule of 12’s gpm range?
A
180-320
10
Q
friction loss rate from 0 to 170
A
<100 = 1 FLR 100 = 2 110 = 2 120 = 3 130= 3 140 = 4 150 = 5 160 = 5 170 = 6
11
Q
Intake pressure drop for 3, 2, 1 like lines
A
10% drop- 3 more like lines
15%- 2
25%- 1
