Ch. 11 water supply distribution systems

Question 1

On page 466 of Fire Inspection and Code Enforcement, two basic types of water supply systems in North America:

Answer 1

public and private systems

Question 2

On page 467 of Fire Inspection and Code Enforcement, ________ is the best method for evaluating the capabilities of the system.

Answer 2

reviewing documentation

Question 3

On page 470 of Fire Inspection and Code Enforcement, elevated tanks have several problems in providing fire protection water supplies. The most important of those problems is the limitation of pressure available from the tank. A tank has to be ____ feet high to generate a pressure of only ___ psi.

Answer 3

100 feet; 43 psi

Question 4

On page 470 of Fire Inspection and Code Enforcement, early suppression fast response sprinklers used for warehouse protection require at least ___ psi.

Answer 4

50 psi

Question 5

On page 470 of Fire Inspection and Code Enforcement, three methods for moving water through the system are:

Answer 5

gravity

direct pumping

combination

Question 6

On page 472 of Fire Inspection and Code Enforcement, a water distribution system consists of 3 types of water mains:

Answer 6

Primary feeders

Secondary feeders

Distributors

Question 7

On page 474 of Fire Inspection and Code Enforcement, valves should be exercised at least _____ to verify that they are in good working condition.

Answer 7

once a year

Question 8

On page 474 of Fire Inspection and Code Enforcement, the _____ and the ______ are two common indicator valves.

Answer 8

post indicator valve (PIV)

outside stem and yoke (OS&Y)

Question 9

On page 477 of Fire Inspection and Code Enforcement, hydrant discharge outlets are considered standard if they contain the following two components:

Answer 9

1. at least one large outlet (steamer connection)

2. two hose outlet nozzles for 2 1/2 inch couplings

Question 10

On page 477 of Fire Inspection and Code Enforcement, hydrants may be painted _______ to indicate that they contain non-potable water.

Answer 10

violet

Question 11

On page 479 of Fire Inspection and Code Enforcement, light blue marked hydrants deliver 1500 gpm or greater is what class of hydrant?

Answer 11

Class AA

Question 12

On page 479 of Fire Inspection and Code Enforcement, green marked hydrants deliver 1000 - 1499 gpm is what class of hydrant?

Answer 12

Class A

Question 13

On page 479 of Fire Inspection and Code Enforcement, orange marked hydrants deliver 500 - 999 gpm is what class of hydrant?

Answer 13

Class B

Question 14

On page 479 of Fire Inspection and Code Enforcement, red marked hydrants deliver less than 500 gpm is what class of hydrant?

Answer 14

Class C

Question 15

On page 480 of Fire Inspection and Code Enforcement, the clearance between the bottom of the butt and the grade should be at least __ inches.

Answer 15

15 inches

Question 16

On page 481 of Fire Inspection and Code Enforcement, The procedure for using a pitot tube and gauge is as follows: Step 1:

Answer 16

Open petcock, verify that air chamber is closed, close petcock.

Question 17

On page 481 of Fire Inspection and Code Enforcement, The procedure for using a pitot tube and gauge is as follows: Step 2:

Answer 17

edge blade into the stream approximately one-half the diameter of the opening

Question 18

On page 481 of Fire Inspection and Code Enforcement, The procedure for using a pitot tube and gauge is as follows: Step 3:

Answer 18

Check velocity reading on gauge

Question 19

On page 481 of Fire Inspection and Code Enforcement, The procedure for using a pitot tube and gauge is as follows: Step 4:

Answer 19

open petcock and drain water

Question 20

On page 482 of Fire Inspection and Code Enforcement, three common types of hydrant outlets:

Answer 20

Rounded (0.9)

Square (0.8)

Projecting (0.7)

Question 21

On page 482 of Fire Inspection and Code Enforcement, a ruler with a scale that measures to at least _____ of an inch should be used to measure the diameter of the outlet or nozzle opening.

Answer 21

1 / 16th

Question 22

On page 485 of Fire Inspection and Code Enforcement, the procedure for conducting an available water test is as follows: Step 1:

Answer 22

locate personnel at hydrant

Question 23

On page 485 of Fire Inspection and Code Enforcement, the procedure for conducting an available water test is as follows: Step 2:

Answer 23

Remove hydrant cap from test hydrant and attach pressure gauge

Question 24

On page 486 of Fire Inspection and Code Enforcement, the procedure for conducting an available water test is as follows: Step 3:

Answer 24

Read and record static pressure

Question 25

On page 486 of Fire Inspection and Code Enforcement, the procedure for conducting an available water test is as follows: Step 4:

Answer 25

remove cap from outlet on the flow hydrant

Question 26

On page 486 of Fire Inspection and Code Enforcement, the procedure for conducting an available water test is as follows: Step 5:

Answer 26

open flow hydrant and record the pitot gauge reading

Question 27

On page 486 of Fire Inspection and Code Enforcement, the procedure for conducting an available water test is as follows: Step 6:

Answer 27

slowly close the flow hydrant to prevent water hammer

Question 28

On page 486 of Fire Inspection and Code Enforcement, the procedure for conducting an available water test is as follows: Step 7:

Answer 28

check pressure gauge on the test hydrant for a return to normal operating pressure.

Question 29

On page 486 of Fire Inspection and Code Enforcement, enough hydrants should be opened to drop the static pressure by at least __ %. If more accurate results are required, the pressure drop should be increase to __%.

Answer 29

10%; 25%

Question 30

On page 490 of Fire Inspection and Code Enforcement, the procedure for conducting a graphical analysis is as follows: step 1:

Answer 30

determine gpm

Question 31

On page 490 of Fire Inspection and Code Enforcement, the procedure for conducting a graphical analysis is as follows: step 2:

Answer 31

locate and plot the static pressure

Question 32

On page 490 of Fire Inspection and Code Enforcement, the procedure for conducting a graphical analysis is as follows: step 3:

Answer 32

locate the total waterflow measured

Question 33

On page 490 of Fire Inspection and Code Enforcement, the procedure for conducting a graphical analysis is as follows: step 4:

Answer 33

locate the residual pressure

Question 34

On page 490 of Fire Inspection and Code Enforcement, the procedure for conducting a graphical analysis is as follows: step 5:

Answer 34

plot the residual pressure above the total water flow measured

Question 35

On page 490 of Fire Inspection and Code Enforcement, the procedure for conducting a graphical analysis is as follows: step 6:

Answer 35

draw a straight line from the static pressure point

Question 36

On page 490 of Fire Inspection and Code Enforcement, the procedure for conducting a graphical analysis is as follows: step 7:

Answer 36

read gpm available at 20 psi