Standards and measurements

Question 1

One cubic foot contains how many cubic inches?

Answer 1

1728 cubic inches.

Question 2

One cubic foot contains how many gallons?

Answer 2

7.5 gallons

Question 3

One cubic foot of fresh water weighs how many pounds?

Answer 3

62.5 pounds

Question 4

One gallon contains how many cubic inches

Answer 4

231 cubic inches.

Question 5

One gallon of fresh water weighs

Answer 5

8.33 pounds

Question 6

A column of water 1’ high exerts a pressure of

Answer 6

0.434 psi at its base

Question 7

• A column of water 2.304’ high exerts a pressure of

Answer 7

1 psi at its base.

Question 8

50’ length of 1.75” hose contains

Answer 8

6.24 gallons of water.

Question 9

50’ length of 1.88” hose contains

Answer 9

7.20 gallons of water.

Question 10

50’ length of 2.5” hose contains

Answer 10

12.74 gallons.

Question 11

50’ length of 3” hose contains

Answer 11

18.35 gallons.

Question 12

100’ length of 4” hose contains

Answer 12

65.25 gallons.

Question 13

100’ length of 5” hose contains

Answer 13

101.94 gallons

Question 14

Friction loss coefficients for the hose sizes used in Fairfax County are as follows:

Answer 14

1”=150 3”=0.8

1 3/4”=10 3 1/2”= 0.34

2”= 8 4”= 0.2

2 1/2=2 5”= 0.08