City Gas Flashcards
The Washington gas company provides pilot relighting for gas appliances (true/false)
False
Emergencies are classified in 4 situations (what are the four)
Gas escaping outside
Gas burning outside
Gas escaping inside
Gas burning inside
Natural gas is heavier or lighter than air?
Lighter
The ignition point of natural gas
1100-1200 degrees
Natural gas burning outside, do not extinguish the fire (true/false)
True
Residential gas meters located outside the building wall have a service main from underground and _____ stopcock just ahead of the meter/regulator
1
The stopcock may have a __________ shaped nut
Pentagonal
Turn the stopcock crosswise to the gas pipe _______of a turn clockwise or counterclockwise
1/4 turn
Turning the stopcock more the 1/4 will allow gas to continue to flow (true/false)
True
The fire valve has a raised operating stem that’s inside a ______ inch pipe
2 1/2”
The fire valve projects ______inches above grade
12”
Remove the cap on the fire valve with a fire plug wrench by turning it __________
Counterclockwise
Curb gate valve, turn the hand wheel or ______ inch square operating head __________ until the valve resists
2”
Clockwise
How many turns to turn off the curb gate valve?
6-20
The curb gate valve shutoff is sometimes used in lieu of a fire valve with written approval from who?
Dc fire marshal
Gas valves in streets and alleys can be operated by fire personnel (true/false)
False …..gas company only
What color is the “gas off” tag?
Red
Who can turn the gas back on?
Gas company only
Once gas shutoff is turned off, even for a moment, it must never be turned back on (true/false)
True….. if turned on, unlighted gas would flow back into the areas
Gas transmission lines from ______psi to _____ psi
60-300
Gas distribution lines from ______psi to ______psi
1/5 psi to 60psi
Gas low pressure from ______psi to ______psi
1/5 to 1/4
Natural gas fueling station at 1240 12 th st SE has an outlet of the fueling nozzle at ________psi
3000
Companies may best accomplish wetting the plastic pipe by using the small line with an 1 1/2” back up (true/false)
True
A proven method for grounding a static charge is to keep exposed plastic wet with ______ or _________.
Water spray or dripping wet rags
