Factors, formulas and measurements

Question 1

1 cubic foot of water = gallons

Answer 1

7.5 gallons

Question 2

1 cubic foot = inches

Answer 2

1728 cubic inches

Question 3

1 gallon of water = how many cubic inches

Answer 3

231 cubic inches

Question 4

1 cubic foot of water equals how many pounds?

Answer 4

62.5

Question 5

1 gallon of water = how many pounds

Answer 5

8.34 lbs

Question 6

1 foot of water in depth = how much PSI

Answer 6

.434

Question 7

1 PSI raises water how many feet

Answer 7

2.304

Question 8

Backpressure(head) per story

Answer 8

5 PSI

Question 9

Atmospheric pressure at sea level

Answer 9

14.7

Question 10

For every 1000’ elevation gain, atmospheric pressure decreases how much PSI

Answer 10

.5 PSI

Question 11

30” Mercury in depth = how much PSI

Answer 11

14.7 PSI

Question 12

1 inch of Mercury = ? PSI

Answer 12

.491

Question 13

1 PSI = ? Inches of Mercury

Answer 13

2.04

Question 14

Mercury is ______ heavier than water

Answer 14

13.5 times

Question 15

1 inch of Mercury =? Feet of water depth

Answer 15

1.1 feet

Question 16

Formula for GPM is

Answer 16

30 x diameter squared x SR nozzle pressure

30xD2xSRofNP

Question 17

Coefficients for hydrants:

Answer 17

Round: .7
Squared: .8
Protruding: .9

Question 18

Nozzle reaction for smooth bore nozzle

Answer 18

1.5 x diameter(sqd) x NP

Question 19

Nozzle reaction for fog nozzle

Answer 19

1/2 GPM

Question 20

Area of a circle

Answer 20

Pi x Radius(Sqd)

Pi R(2)

Question 21

Volume of a cylinder

Answer 21

Pi x radius(2) x height

Question 22

Volume of a cylinder in gallons

Answer 22

.7854 x D(2) x L x 7.5

            Or

D(2) x 6 x length

Question 23

Volume of hose in gallons

Answer 23

.0408 x D(2) x L

Question 24

FL in 2.5”

Answer 24

2Q(2)

Question 25

FL in 1-3/4"

Answer 25

2Q(2) x 6

Question 26

FL in 1-1/2"

Answer 26

2Q(2) x 13

Question 27

FL in 1"

Answer 27

2Q(2) x 100

Question 28

FL in 3"

Answer 28

2Q(2) x 2.5

Question 29

FL in 4"

Answer 29

2Q(2) x .1

Question 30

FL in 4-1/2"

Answer 30

2Q(2) / 19

Question 31

FL in 5"

Answer 31

2Q(2) / 32

Question 32

FL in 6"

Answer 32

2Q(2) / 80

Question 33

FL in parallel 2-1/2 & 3" lines of equal length

Answer 33

2Q(2) / 6

Question 34

Appliance FL

Answer 34

``` Wye/Siamese = 10 PSI Monitor = 15 PSI Standpipe = 25 PSI ```

Question 35

Pump capacity

Answer 35

100% @ 150 PSI 70% @ 200 PSI 50 % @ 250 PSI

Question 36

Afff solution application rate

Answer 36

.1 GPM/Sq. Foot

Question 37

Handheld nozzle largest diameter

Answer 37

1-1/8"

Question 38

Smallest heavy appliance smooth bore

Answer 38

1-1/4"

Question 39

Standpipe initial pressure

Answer 39

100 PSI

Question 40

Sprinkler connection pressure

Answer 40

150 PSI