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Week 3 Block Test 4 > Chapter 15 Water Supply > Flashcards

Chapter 15 Water Supply Flashcards

1
Q

What two sources to Fire fighters obtain water from?

A
  1. Municipal water systems- Furnish water under pressure through fire hydrants.
  2. Static water sources- such as lakes and streams
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2
Q

Dry Hydrants

A

also called drafting hydrants, provide quick and reliable access to static water sources.

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3
Q

Standard on Water Supplies for Suburban and Rural Fire Fighting

A

NFPA 1142

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4
Q

Mobile water supply apparatus

A

often called tankers or water tenders. Engines carry 500 gallons Tankers carry 1000-3500 some 5000 gallons

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5
Q

Portable Tanks

A

Carried on fire apparatus can be quickly set up at a fire scene. 600 to 5000 gallons

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6
Q

Dump Valve

A
  1. tankers can off load as much as 3000 gallons per minute.

2. the faster it off loads the faster it can return to the fill site for another load.

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7
Q

Tanker Shuttle

A

used when a large volume of water is needed for an extended period at a fire. efficiently delivers several hundred gallons of water per minute without

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8
Q

Where do Municipal water come from?

A

water is drawn from wells, rivers, streams, lakes or human made storage facilities called RESERVOIR.

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9
Q

Water Mains

A

the distribution system delivers water from the treatment facility to the end users and fire hydrants through a complex network of underground pipes.

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10
Q

Water Hydrant PSI

A

minimum 20psi to 80psi

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11
Q

Gravity Fed System

A

the water source, treatment plant and storage facilities are located on high ground while the end users live in lower lying areas.

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12
Q

Elevated Water Storage Towers

A

facilities maintain the desired water pressure in the distribution system, ensuring that water can be delivered under pressure even if the pumps are not operating.

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13
Q

Primary Feeders

A

Large mains carry large quantities of water to a section the town/city

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14
Q

Secondary Feeders

A

Distribute water to a smaller area

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15
Q

Distributors

A

smallest pipes carry water to the users and hydrants along individual streets

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16
Q

Shut off Valves

A

Located at the connection points where the underground mains meet the distributor pipes. valves control the flow of water to customers or individual fire hydrants.

17
Q

Types of Hydrants

A
  1. Wet Barrel Hydrants

2. Dry Barrel Hydrants

18
Q

Private water systems

A

Supplied by the municipal water system or from a separate source.

19
Q

Wet-barrel hydrants

A

Used in locations where temps. do not drop below freezing. they always have water in the in the barrel and do not have to be drained.

20
Q

Dry-barrel hydrants

A

used in climates where temperatures can be expected to fall below freezing. Valve controls the flow of water into the barrel.

21
Q

Fire Hydrant location

A

500 ft. in residential areas and every 300 ft. in high value commercial and industrial areas. At intersection and middle block, and every 100 ft. FD connection for large buildings

22
Q

Red Hydrant Specs Class C

A

less than 500 gpm

23
Q

Orange Hydrant Class B

A

500-999 gpm

24
Q

Green Hydrant Class A

A

1000-1499 gpm

25
Q

Light Blue Class AA

A

1500 gpm

26
Q

Static Pressure

A

the pressure in a system when the water is not moving, Static pressure is potential energy.

27
Q

Elevation Pressure

A

Static pressure is generally created by elevation pressure.

28
Q

Normal Operating Pressure

A

to the amount of pressure in a water distribution system during a period of normal consumption. May change depending on time of day.

29
Q

Residual Pressure

A

the amount of pressure that remains in the system when water is flowing.

30
Q

Flow Pressure

A

Measures the quantity of water flowing through an opening during a hydrant test.

31
Q

Pilot Gauge

A

is used to measure flow pressure in psi and to calculate the flow in gallons per minute.

32
Q

Dry Hydrant not dry barrel

A

provide quick and reliable access to static water sources. Its a pipe with a strainer (24inches) around strainer

33
Q

Parts of a dry barrel hydrant (8)

A
  1. Barrel
  2. bonnet
  3. stem nut
  4. main valve
  5. Drain holes
  6. operating stem
  7. 2- 2.5 inch connections
  8. 1- 4.5 inch steamer port
34
Q

Water Hammer

A

recoil or shockwave cause by opening or closing nozzle quickly

35
Q

Municipal

A
  1. water distribution
  2. water source
  3. water facility

Week 3 Block Test 4 (4 decks)

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