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Bates Academy Block Test 3 > Chapter 9 Water Supply > Flashcards

Chapter 9 Water Supply Flashcards

1
Q

Aquifer

A

A formation of permeable rock, gravel, or sand holding water or allowing water to flow through it.

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2
Q

Atmospheric Pressure

A

The pressure exerted by the atmosphere, which is 14.7 pounds per square inch at sea level.

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3
Q

Backflow Preventers

A

A check valve or set of valves used to prevent backflow of water from one system into another.

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4
Q

Check Valve

A

Valve installed to control water flow in one direction, typically when different systems are interconnected.

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5
Q

Cistern

A

An underground water tank made from natural rock or concrete.

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6
Q

Drafting

A

The pumping of water forma static source by taking advantage of atmospheric pressure to force water from the source into the pump.

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7
Q

Dry Hydrant

A

A piping system for drafting from a static water source with a fire department connection at one end and a strainer at the water end.

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8
Q

Dump Site

A

Are where tenders are unloaded or their load dumped.

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9
Q

Fill Site

A

Area where tenders are filled or attain their water.

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10
Q

Fire Flow Capacity

A

The amount of water available or amount that the water distribution system is capable of generating versus the amount of water required for cooling the fuels below their ignition point.

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11
Q

Gate Valve

A

Indicating or nonindicating valve that is opened or closed to control water flow.

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12
Q

Jet Dump

A

A device that speeds the process of dumping a load of water from a tanker/tender.

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13
Q

Jet Siphon

A

A device that speeds the process of transferring water from one tank to another.

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14
Q

Portable Water Tanks

A

Collapsible or inflatable temporary tanks for the storage of water that is dumped from tankers or tenders. Usually carried by the tender to set up a dump site.

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15
Q

Pressure

A

The force, or weight of a substance, usually water, measured over an area.

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16
Q

Residual Pressure

A

The pressure in a system after water has begun flowing.

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17
Q

Shuttle Operation

A

The sycle in which mobile water supply apparatus is dumped, moves to a fill site for refilling, and is returned to the dump site.

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18
Q

Tanker

A

Term given to aircraft capable of carrying and dropping water or fire retardant. Some departments still use term to describe land-based water apparatus.

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19
Q

Tender

A

Land based mobile supply apparatus. Some departments still use the term to describe hose-carrying support apparatus.

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20
Q

Tidal Changes

A

Rising and falling of the surface water levels due to the gravitational effects between the earth and the moon.

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21
Q

Water Hammer

A

A sudden surge of pressure created by the quick opening or closing of valves in a water system. Surge is capable of damaging piping and valves.

22
Q

Water Table

A

Level of ground water under the surface.

23
Q

Water Tender

A

Land based water apparatus.

24
Q

What is most abundant source of the earth’s fresh water supply?

A

Groundwater

25
Q

Besides municipal systems, what other system can possibly be used for suppression?

A

Farm Irrigation Systems

26
Q

What are natural sources of water?

A

Rivers, lakes and ponds

27
Q

What are man-made sources of water

A

Lakes, ponds, reservoirs, pools, and water tanks.

28
Q

Most engines today have what sized water tank?

A

500 Gallons

29
Q

If a tank is over 1000 gallons it is primarily considered what?

A

Mobile water supply apparatus. Between 1000 and 8000 gallons.

30
Q

Tender requirements are?

A

Attack pump of at least 250 gpm, fire pump of at least 750 gpm, OR a transfer pump of at least 250 gpm.

31
Q

A gasoline truck modified to a tender will have to be able to hold what higher percentage of weight from gas compared to water?

A

20% more

32
Q

What are the three ways water is supplied?

A

Gravity fed, direct pump, or combination (most common).

33
Q

After treatment water is then sent to where?

A

Water mains, then to primary feeders, secondary feeders and then distribution lines.

34
Q

Distributor lines range in size from?

A

6 to 16 inches.

35
Q

Firefighter should keep a lock out for what type of hydrant due to its possibly low pressure?

A

Dead end hydrants. Not found on loops and grids.

36
Q

What type of hydrant is found in places not known for freezing temperatures?

A

Wet Barrel Hydrants

37
Q

Which type of hydrant does not have to be shut down to add another connection?

A

Wet barrel hydrants, each outlet is controlled by separate valve.

38
Q

The valve and base of the hydrant are located where in terms of depth?

A

Found below ground level at the level of the water main.

39
Q

When attaching to a wall mounted hydrant be careful to not instead connect to what?

A

Fire pump connection outlet. This is used for inspectors test of the system.

40
Q

Mounted below grade level and found in a pit, vault, or valve box?

A

Flush-type hydrant

41
Q

What type of hydrant is connected to a separate water system only used for fire protection purposes?

A

High-pressure hydrant

42
Q

Where are you most likely to find hydrant locks?

A

Privately owned property such as industrial plants and airports.

43
Q

What position in ICS should be utilized in the event a water supply operation is needed?

A

Water Supply Group Supervisor

44
Q

What size should a portable water tank be that is carried on a mobile apparatus?

A

Capacity equal or greater than its tank size.

45
Q

A fill site should not only have an adequate water source but a…

A

Sufficient turn around area, preferably drive through site with no need to turn around to exit.

46
Q

Due to tank construction and time purposes how much water is left in a tank after a dump?

A

10%

47
Q

How can time be improved on an shuttle operation?

A

Time dumping and filling, NOT driving faster.

48
Q

At sea level a 1 ft. column of water weighs how much?

A

.433 lbs, creating a pressure at the bottom of the column of .433 psi.

49
Q

Atmospheric pressure reduces .5 psi per _______ elevation

A

1000 ft.

50
Q

Pressure in a non-flowing closed system equal at all points but while flowing…

A

is reduced by friction created by its movements and loss of pressure at its opening.

51
Q

At what psi will you damage plumbing systems?

A

150 or greater.

52
Q

High flow/high pressure systems are an advantage where as which systems should be avoided?

A

Low pressure/low flow areas.

Bates Academy Block Test 3 (5 decks)

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