Hydraulics

Question 1

1 cubic foot contains
in inches
gallons
weight

Answer 1

1728 cubic inches

7. 5 gallons
8. 5 pounds

Question 2

A column of water 1’ high exerts

Answer 2

0.434 psi

Question 3

1.88 hose 50’ long has how many gallons

Answer 3

7.2 gallons of water

Question 4

100ft 4’’ house contains how many gallons

Answer 4

65.25 gallons

Question 5

For 1 psi how high does the column of water have to be

Answer 5

2.304’

Question 6

smooth bore hand line np

Answer 6

50 psi

Question 7

all other fog nozzles besides Akron assault

Answer 7

100psi Akron 50 psi

Question 8

Smooth bore master streams np

Answer 8

80 psi but can be increased to 100 for higher flow

Question 9

Formula for rectangular containers

Answer 9

LxWxDx7.5 if two depths add depts. together and divide by two LxWx(3+9/2)7.5

Question 10

cylindrical containers

Answer 10

3.14x R squared xHx7.5

Question 11

Smooth bore nozzle discharge formula

Answer 11

GPM=29.7xDsquared x square root NP

Question 12

Decon shower

Answer 12

270gpm at75psi

Question 13

piercing nozzle

Answer 13

125gmp at 100psi

Question 14

Smooth bore break away nozzle tip, size, gpm, psi

Answer 14

1 3/8 500gpm 110psi
1 1/2 600gpm 110psi
1 3/4 800gpm 110psi
2 1000gpm 120psi

Question 15

task force tip

Answer 15

500gpm 90psi
750gpm 110psi
1000gpm 120psi
1250 140psi

Question 16

Mercury monitor

Answer 16

80psi smooth bore
100psi fog nozzle
max inlet pressure 150psi
app loss 10psi

Question 17

Coefficients

Answer 17

1" 150
1 3/4" 10 ( IFSTA 15.5)
2" 8
2 1/2" 2
3" 0.8
3 1/2 .34
4" .2
5" .08

Question 18

Friction loss formula

Answer 18

FL=CQsquaredL

Question 19

App loss

Answer 19

less then 350=0
Greater than 350=10
Ladder pipes=25
master streams (except mercury monitor)=25
standpipes=25

Question 20

Basic pump operators formula

Answer 20

PDP=FL+AL+TPL

Question 21

TPL formula

Answer 21

TPL=FL+AL+/-EL

Question 22

JS10 nozzle

Answer 22

100gpm at 100psi

Question 23

Educators

Answer 23

95-125gpm at 200psi at educator

Eductor must be 50’ from pumper and within 200 of nozzle nor more then 5’ above educator

Question 24

Nozzle for cafs engine

Answer 24

15/16 best results

Question 25

Max time you can flow without over heating a cafs engine

Answer 25

2 hours

Question 26

supply lines charges to ___ initially

Answer 26

4” 50psi
3” 100psi
4”&3” 100psi

Question 27

Max flow for Fairfax county engines

Answer 27

1500gpm at 150psi static source
1050gpm at 200psi (75% drop)
750gpm at 250psi(50% drop)

Question 28

Coefficient for multiple supply lines

Answer 28

two 3”=.2
4”&3”=.09
two 4”=.05

Question 29

Like volumes

Answer 29

(SP-RP)100/SP
0-10% 3x
11-15% 2x
16-25% 1x
26+ 0x