SFD Hydraulics

Question 1

PDP

Answer 1

Pump discharge pressure

Question 2

NP

Answer 2

Nozzle pressure

Question 3

FL

Answer 3

Friction Loss

Question 4

APP

Answer 4

Appliance Pressure

Question 5

EL

Answer 5

Elevation gain/loss

Question 6

NP for Handheld fog nozzles
(SM20FG, SM30FG)

Answer 6

100 psi

Question 7

NP for Handheld high rise “low pressure”fog nozzles
(SM20FGLP, fire chief)

Answer 7

75 psi

Question 8

NP for Handheld/offensive smooth bore nozzles
(1 1/4” and smaller)

Answer 8

50 psi

Question 9

NP for Master stream/defensive smooth bore
(1 1/4” and larger)

Answer 9

80 psi

Question 10

NP for Any deck gun/master stream fog

Answer 10

75 psi

Question 11

NP for Rapid attack nozzle
(RAN) @ 400 GPM

Answer 11

50 psi

Question 12

NP for Piercing nozzle @100 gpm

Answer 12

100 psi

Question 13

If an 1 1/4” tip is to be used as a offensive attack line what will the nozzle pressure be?

Answer 13

50 psi

Question 14

If a 1 1/4” tip is used as a defensive line or in a Keenan loop, what will the nozzle pressure be?

Answer 14

80 psi and GPM will be adjusted accordingly.

Question 15

Friction loss formula

Answer 15

FL = C x Q² x L

Question 16

1 3/4” coefficient

Answer 16

12

Question 17

2 1/2” coefficient

Answer 17

2

Question 18

(2) 2 1/2” coefficient

Answer 18

0.5

Question 19

4” coefficient

Answer 19

0.2

Question 20

Q=

Answer 20

(Total GPM through same diameter hose line/100) ²

Question 21

L=

Answer 21

(Total length of same diameter hose line/100)

Question 22

APP for Aerial Waterway and/or Downed Forward Pump (Dead Pump)

Answer 22

25 psi

Question 23

APP for Any Building Standpipe System

Answer 23

25 psi

Question 24

APP for Any Master Stream Monitor (except Rapid Attack Monitor)

Answer 24

10 psi

Question 25

APP for Any Gated Wye*

Answer 25

10 psi

Question 26

APP for Any Reducer (from larger to smaller diameter) *

Answer 26

10 psi

Question 27

APP for Rapid Attack Monitor @ 400 GPM

Answer 27

5 psi

Question 28

What appliances are only factored into PDP if they are being used in a hose system that is flowing greater than 350 gpm?

Answer 28

Any gated wye and any reducer (larger-smaller)

Question 29

APP is factored into every piece of equipment in the system that-

Answer 29

Generates appliance loss

Question 30

For high rise ops, how many psi per elevated floor may be used?

Answer 30

5 psi

Question 31

Nozzle GPM for handheld fog (SM20-FG)

Answer 31

150 GPM

Question 32

Nozzle GPM for high rise fog (SM20FG-LP)

Answer 32

150

Question 33

Nozzle GPM for fire chief nozzle (4014-HR)

Answer 33

150 GPM

Question 34

Nozzle GPM for 2 1/2” fog (SM-30F)

Answer 34

250 GPM

Question 35

Nozzle GPM for RAM XD

Answer 35

400 GPM

Question 36

Nozzle GPM for Master stream fog nozzles

Answer 36

1000

Question 37

Nozzle GPM for 1” tip

Answer 37

200 GPM

Question 38

Nozzle GPM for 1 1/8” tip

Answer 38

250 GPM

Question 39

Nozzle GPM for 1 1/4” tip (handheld/offensive)

Answer 39

300 GPM

Question 40

Nozzle GPM for 1 1/4” tip (master stream/defensive)

Answer 40

400 GPM

Question 41

Nozzle GPM for 1 3/8” tip

Answer 41

500 GPM

Question 42

Nozzle GPM for 1 1/2” tip

Answer 42

600 GPM

Question 43

Nozzle GPM for 1 5/8” tip

Answer 43

700 GPM

Question 44

Nozzle GPM for 1 3/4” tip (SB)

Answer 44

800 GPM

Question 45

Nozzle GPM for 1 7/8” tip

Answer 45

900 GPM

Question 46

Nozzle GPM for 2” tip

Answer 46

1000 GPM

Question 47

Total PDP for any hose system should not be more than what PSI?

Answer 47

250 PSI

Question 48

Master streams are defined as-

Answer 48

Hose lines flowing more than 350 GPM though a single, continuous hose system

Question 49

What is the minimum GPM for an 1 3/4” attack line per NFPA 1710?

Answer 49

150 GPM

Question 50

All minimum GPMs are dependent upon what?

Answer 50

Proper residual pressures to support all desired hose lines in operation

Question 51

Pump operators shall notify Command anytime their residual intake pressure drops below what PSI?

Answer 51

10 PSI

Question 52

What foam % is best for overhaul?

Answer 52

0.1-0.2% (wet foam)

Question 53

What foam % is best for initial attack (when applicable)

Answer 53

0.3-0.5%

Question 54

What foam % is best for exposure protection

Answer 54

1% (dry foam)

Question 55

What foam % is best for hydrocarbons

Answer 55

3%

Question 56

What foam % is best for polar solvents

Answer 56

6%

Question 57

Bump bag PDP

Answer 57

100PSI

Question 58

Ganzer pack minimum PDP

Answer 58

75 PSI and pump to effect

Question 59

Connections to an FDC to support a sprinkler system shall be pumped at what psi

Answer 59

150 psi with known sprinkler activation, or smoke/flames visible from the target occupancy.

Question 60

Percent drop method calculation (hydrant performance)

Answer 60

(Static – Residual) x 100 /Static

Question 61

PDP Calculation

Answer 61

PDP = NP + FL¹ + FL² + APP¹ + APP² ± EL

Question 62

If residual pressure drops 0-10% you can pump

Answer 62

3x GPM

Question 63

If residual pressure drops 11-15% you can pump

Answer 63

2x GPM

Question 64

If residual pressure drops 16-25% you can pump

Answer 64

1x GPM