Chapter 8 Water Supply Operations Flashcards Preview

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Flashcards in Chapter 8 Water Supply Operations Deck (12)
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1
Q

How much water is carried on a SFD engine company?

A

500 Gallons

2
Q

How long can you work off of tank water for an 1 3/4”?

A

Almost 3 minutes

3
Q

What are the 3 water supply evolutions?

A

Lay in, Lay out and Split

4
Q

NFPA requires what types of threads on hydrants?

A

National Standard Thread NST

5
Q

What are the 3 basic components of a hydrant?

A

Barrel, stem, outlets

6
Q

What is a corey top?

A

a 2-2.5” outlet on top of the barrel for the utilities department

7
Q

What is a clow hydrant?

A

All outlets are arranged horizontally, found in commercial and industrial occupancies

8
Q

What are the basic flows from a hydrant that an engine company can count on?

A
  1. A single 5” line may not flow all available water
  2. 2.5” outlet will deliver 80% of a 4.5” outlet
  3. 4.5” discharge will deliver 2100 GPM at 15PSI
9
Q

What are the color/flow rates for the SFD hydrants?

A

Red - less than 500
Yellow - 500-999
Green 1,000 or more GPM

10
Q

What is a forward lay?

A

Hydrant to the fire

11
Q

Describe wet vs. dry lead

A

Wet - the Back up will remain at the plug to charge the plug

Dry - the Back up returns to the engine

12
Q

Describe a reverse lay.

A

Fire building to the hydrant