Hydraulics Manual

Question 1

A column of water 1 foot high exerts how much pressure at its base

Answer 1

.434 psi

Question 2

A column of water 2.304 feet in height exerts a pressure of what at its base

Answer 2

1 psi

Question 3

Nozzle pressure for Handline smoothbore nozzle’s is 50 psi but can be increased to what for higher flow

Answer 3

65 psi

Question 4

nozzle pressure for Master streams with Smoothbore Nozzles is 80 psi but can be increased to want to achieve higher flow

Answer 4

100 psi

Question 5

Define flow pressure

Answer 5

Pressure created by the velocity of water coming from a discharge opening

Question 6

Define head pressure

Answer 6

Water pressure due to elevation

Question 7

Define residual pressure

Answer 7

Pressure remaining in a water system when water is flowing

Question 8

Define velocity

Answer 8

The speed at which water passes a given point

Question 9

 What formula is used to determine the volume for a rectangular or square shaped container

Answer 9

L x W x D x 7.5 gallons/cubic foot

Question 10

What is the formula to determine the volume of a cylinder pipe or hose in gallons

Answer 10

3.14 x r^2 x L x 7.5 gallons/cubic foot

Question 11

What is the theoretical calculated flow of a 15/16 Smoothbore nozzle

Answer 11

185 gpm

Question 12

What is the fireground calculation for flow of a 15/16 smoothbore nozzle

Answer 12

185 gpm

Question 13

What is the theoretical calculation of flow for a 1 inch smoothbore nozzle

Answer 13

210 gpm

Question 14

What is a Fire Ground calculation of flow for a 1 inch smoothbore nozzle

Answer 14

200 gpm

Question 15

What is the theoretical calculation of flow for a 1 1/8 inch smoothbore nozzle

Answer 15

266 gpm

Question 16

What is a Fire Ground calculation of flow for a 1 1/8 inch smoothbore nozzle

Answer 16

250 gpm

Question 17

What is a Theoretical calculation of flow for a 1 1/4” smoothbore nozzle

Answer 17

328

Question 18

what is the fireground calculation of flow for a 1 1/4” Smoothbore nozzle

Answer 18

325

Question 19

What is the theoretical calculation of flow for 1 3/4” smoothbore nozzle

Answer 19

814

Question 20

What is the fire ground calculation of flow for a 1 3/4” smoothbore nozzle at 80 psi

Answer 20

800

Question 21

What is the range of flow for a 1 inch adjustable gallonage fog nozzle

Answer 21

12-60

Question 22

What is the range in flow for the 2 1/2” Akron adjustable flow fog nozzle

Answer 22

125-250

Question 23

What is the flow and pressure of a Decon shower

Answer 23

270 gpm
75 psi

Question 24

What is the flow and pressure of a piercing nozzle

Answer 24

125 gpm
100 psi

Question 25

What is the flow and pressure for a 2 1/2” distributor nozzle

Answer 25

250 gpm 100 psi

Question 26

What is the flow and pressure for a 1 1/2” distributor nozzle

Answer 26

95 gpm 50 psi

Question 27

What is the flow and pressure for a 2 1/2 inch seller nozzle

Answer 27

350 gpm 100 psi

Question 28

What is the flow and pressure for a 11/2” cellar nozzle

Answer 28

160 gpm 100 psi

Question 29

What nozzle pressure should be given to a fixed monitor smoothbore breakaway nozzle

Answer 29

110 psi 120 psi for 2” at 1000 gpm

Question 30

What nozzle pressure shall be given to the combination monitor smoothbore nozzle which may be attached/ detached from the pumper

Answer 30

80 psi

Question 31

What is the coefficient for 1” hose

Answer 31

150

Question 32

What is the rating of a national foam JS 10 air aspirating nozzle

Answer 32

100 gpm at 100 psi variable spray or straight stream Can be used with all low expansion foam concentrates

Question 33

In a relay the maximum amount of water being delivered to the fire scene is limited by what two factors

Answer 33

Water source pump capacity of smallest pumper and relay

Question 34

What is the maximum flow from a side intake

Answer 34

1750 gpm

Question 35

What is the maximum flow of a rear intake

Answer 35

1500-1750 gpm

Question 36

What is the maximum flow of a front intake

Answer 36

900 gpm

Question 37

Anytime incoming pressure from a water source exceeds ——- psi the pump shall be operated in pump gear to avoid damage to the pump gears and auto lube system

Answer 37

50 psi

Question 38

how does A Pressure Governor compensate for overpressure under pressure on the discharge side of the pump

Answer 38

By increasing or decreasing the engine rpm is necessary to maintain the set pump discharge pressure

Question 39

If water supplies lost the driver operator must do what ?

Answer 39

Open tank to pump valve utilizing tank water the notify interior crew in command they’re operating off tank water

Question 40

coefficient for dual 3” hose with 2.5” coupling

Answer 40

.2

Question 41

coefficient for dual 4” hose

Answer 41

.05

Question 42

coefficient for 1-4” & 1-3”

Answer 42

.09

Question 43

weight cubic foot of water

Answer 43

62.5 lbs

Question 44

remember when calculating EP for buildings, multiply by 4.34 NOT .434

Answer 44

remember when calculating EP for buildings, multiply by 4.34 NOT .434