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Building Construction > Water Utilities > Flashcards

Water Utilities Flashcards

1
Q

what do water supply systems do?

A

supply water to distribution systems

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2
Q

what type of distribution systems are there?

A

gravity pump or combination of both

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3
Q

elevation of 100ft will create how much pressure?

A

43psi (.433 per ft of elevation )

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4
Q

where do gravity systems get their supply?

A

lakes and reservoirs

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5
Q

when are pumps used ?

A

when water source are at or below municipality?

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6
Q

what type of system is Los Angeles ?

A

Combination system supplies 600 million gallons a day

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7
Q

what does the Los Angeles Distribution system consist of ?

A

pipes
valves
check valves
water meters

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8
Q

how are pipelines in distribution systems classified

A

trunk lines, mains, service and customer lines

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9
Q

what are trunk lines?

A

they carry water from source to mains

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10
Q

what size are trunk lines?

A

36 inches to 10 ft and can made iron or concrete

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11
Q

what are main lines?

A

run beneath street and parallel to curb vary 2 to 72 inches in size made of iron pipe

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12
Q

why do mains cross connect

A

to form loops that allow shutting down specific main for repairs

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13
Q

what are service lines?

A

run between main and water meter can vary 1/2 inch to 12 inches can be iron, copper, or galvanized beer

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14
Q

what are customer lines?

A

run between water meter and structure 1/2 inch to 12 inches can be iron, copper, galvanized, or plastic pipe

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15
Q

what are water water utilities companies are normally responsible for maintenance and repair of water distribution system including:

A

water metering device

shut off valves on either side of meter device

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16
Q

What are building owner responsible for maintenance and repair?

A

plumbing from shut off valve on the output side

all plumbing inside the structure

17
Q

what are water service system consist of ?

A

shut off valve
water meters
detector check valves
pressure reducing valves

18
Q

what are shut off valves?

A

provides mean for controlling the flow of water through service and customer lines

19
Q

what kind of shut off valves do you have?

A

non indicating valves; ball cone and gate valves that have rectangular nut on top of valve. valve is closed when perpendicular

Indicating valves
outside stem and yoke and post indicator valves

20
Q

what are water meter and check valves ?

A

meters calculate water usage vary in size 1/2 inch to 10 inch, check valves allow flow of water in one direction only

21
Q

what are compound meters ?

A

for domestic water usage that use high and low water flows.
during high flows a check valve opens and allows large flows that are metered separately
they’re usually 4 inches or larger

22
Q

what are detector check valves?

A

open allows water to flow straight through unmetered

closed prevents water to flow back to distribution system(FD pumping to standpipes)

23
Q

water service for domestic water and fire protectional located where ?

A

separate below ground vaults or located above ground

24
Q

where are shut off normally located ?

A

Adjacent to water meters in separate vaults ir single mete that serves an entire building

25
Q

how do wet pipe system work?

A

water in it all time when head is activated water flows from activated heads

26
Q

how is water supplied to wet pipe system?

A

supplied gravity tank, pressure tank, automatic fire pump, or water service system

27
Q

how do automatic dry system works?

A

they’re filled with compressed air when head is activated air is released causes drop in pressure which allows water to enter system

28
Q

where is water supplied from from in auto dry pipe system?

A

gravity tank, pressure tank, automatic fire pump, water service system

29
Q

what is non automatic system

A

pipes are dry. it takes the fire dept apparatus to pump into fdc

30
Q

what is a deluge system

A

may be open or closed and supplied with water by a heat actuated valve.

31
Q

where is deluge system get their water supply from

A

gravity tank, pressure tank, automatic fire pump, or water service system

32
Q

what are dry standpipes?

A

siamese connection piping 2 1/2 inch outlets on each floor and roof.

water is supplied to this system by fire dept apparatus

33
Q

what are wet standpipes ?

A

designed for occupant use 100ft of 1 1/2 single jacket hose with 1/2 inch straight tip NO SHUT OFF

34
Q

what valves shall you not shut off with out appropriate approval is obtained?

A

LIFE SUPPORT MACHINE IN AREA

SHUT GATE SYSTEM DIVIDE

35
Q

how many turns may require to complete shutdown of a hydrant?

A

18-26 turns two members applying moderate pressure to gate key

36
Q

whats the percentage of fire hydrant gate valves close clockwise?

A

98%

37
Q

what must you let metro know when you encounter a sheared hydrant?

A

fire hydrant location
state if fire hydrant has been shut off
the number of valves operated

Building Construction (4 decks)

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