Hydraulics

Question 1

Coefficient for 1.88” hoseline

Answer 1

10

Question 2

Coefficient for 2.5” hoseline

Answer 2

2

Question 3

Coefficient for 3” hoseline

Answer 3

.8 (1)

Question 4

Coefficient for 4” hoseline

Answer 4

.2

Question 5

Coefficient for 5” hoseline

Answer 5

.08

Question 6

A column of water 1’ high exerts a pressure of ______ at its base

Answer 6

.434

Question 7

100 feet of 4” contains how much water?

Answer 7

65.25

Question 8

50 feet of 3” contains how much water?

Answer 8

18.35

Question 9

50 feet of 2.5” contains how much water?

Answer 9

12.74

Question 10

50 feet 1.88” contains how much water?

Answer 10

7.20

Question 11

Nozzle pressure for ALL smooth bore handlines. What can it be increased to?

Answer 11

50psi, 65psi

Question 12

Nozzle pressure for master streams with a smooth bore? What can they be increased to?

Answer 12

80psi, 100psi

Question 13

Nozzle pressure for all master streams with a fog nozzle?

Answer 13

100psi

Question 14

water pressure due to elevation. For each foot of elevation above the
pump the pressure increases by 0.434 psi

Answer 14

Head pressure

Question 15

the generic term applied to any nozzle, wye, siamese, deluge monitor, or any
other piece of hardware used in conjunction with fire hose for the purpose of delivering
water.

Answer 15

Appliance

Question 16

pumps used on all modern fire apparatus. This type of pump takes
advantage of incoming pressure. Water enters the eye of the pump then travels through
one or more impellers.

Answer 16

Centrifugal pumps

Question 17

small positive displacement pump used to evacuate air from a centrifugal
pump housing allowing the pump to receive water.

Answer 17

Primer pumps

Question 18

The formula for determining volume for a rectangular or square shaped container is

Answer 18

L’ x W’ x D’ x 7.5

Question 19

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

Answer 19

π x r (squared) x H’ (or L’) x 7.5 gallons

Question 20

Smooth Bore nozzle discharge formula?

Answer 20

gpm = 29.7 x d2x (square root) NP

Question 21

Master Stream 2” tip GPM

Answer 21

1062 (1000)

Question 22

Master Stream 1 3/4” tip GPM

Answer 22

814 (800)

Question 23

Master Stream 1 1/2” tip GPM

Answer 23

598 (600)

Question 24

Master Stream 1 1/4” tip GPM

Answer 24

415 (400)

Question 25

Master stream 1 3/8" tip gpm

Answer 25

502 (500)

Question 26

Decon Shower GPM's and pressure

Answer 26

270gpm at 75psi

Question 27

Piercing Nozzle GPM's and pressure

Answer 27

125gpm at 100psi

Question 28

1 3/4" coefficient

Answer 28

15.5

Question 29

1" coefficent

Answer 29

150

Question 30

2" coefficent

Answer 30

8

Question 31

The National Foam JS-10 air aspirating nozzle has a rating of ____ gpm at ____ psi at the tip

Answer 31

100gpm, 100psi at the tip

Question 32

Fairfax County Portable Foam Eductor’s flow _____-____ gpm with a pump discharge pressure of _____psi at the eductor

Answer 32

95-100gpm, 200psi at the eductor

Question 33

Pierce Pumpers equipped with the Husky Foam system. It is capable of injecting foam from ____-____% with a rated capacity of ___gpm of foam concentrate at 150 psi

Answer 33

.1-3%, 3gpm of foam @150 psi

Question 34

dual 3" coefficient

Answer 34

.2 (same as single 4")

Question 35

dual 4" coefficient

Answer 35

.05

Question 36

one 3" and one 4" coefficient

Answer 36

.09

Question 37

Starting PDP for sprinkler systems is

Answer 37

150psi

Question 38

Starting PDP for combination systems is

Answer 38

150psi

Question 39

Starting PDP for aerial master streams is

Answer 39

150 psi

Question 40

Nozzle Reaction for smooth bore nozzles

Answer 40

NR = 1.57 x d2 x NP

Question 41

Nozzle reaction for fog nozzle

Answer 41

NR = .0505 x Q x √NP

Question 42

What do you throttle up to when drafting?

Answer 42

1000-1200gpm

Question 43

What must you do before attempting to draft?

Answer 43

make sure everything is closed!!!!

Question 44

The 2½” distributer nozzle flows ____gpm at ____psi

Answer 44

250gpm at 100psi

Question 45

The 1½” distributer nozzle flows ____gpm at ____psi

Answer 45

95gpm at 50psi

Question 46

The 2½” cellar nozzle flows ____gpm at ____psi

Answer 46

350gpm at 100psi

Question 47

The 1½” cellar nozzle flows ____gpm at ____psi

Answer 47

160gpm at 100psi