Utilities Manual Flashcards
An average rate of exposure over the course of an 8hr work shift is _____. (pg.4) FC
Time Weighted Average (TWA)
American Public Works Association (APWA) color code for gas, oil, steam, petroleum, or gaseous materials is _____? (pg.6) FC
Orange
What is the number for miss utility? (pg.7) FC
1-800-552-7001 or 811
_____ is a pungent odorant that is added to natural gas as a safety precaution after its received at the distribution site. (pg.8) FC
Mercaptan
Natural gas has a vapor density of .55 making it _____ than air and causing it to _____. (pg.8) FC
Lighter / Rise
The flammable range of natural gas is between __ - __ percent. (pg.8) FC
5 – 15
The proper sequence for shutting off the utility in a leak or fire is.. (pg.12) FC
At the appliance / At the meter / At the curb
Roughly, the ignition temperature for natural gas is about _____. (pg.8) FC
1200 Degrees F
Engine Companies shall position the apparatus_________ and no closer than ____ feet and a minimum distance of ____ feet for all other incoming units on gas leak. (pg.13) FC
Prior to and upwind / 100ft / 300ft
Electric, cable, conduit, and lighting cable is what color? (pg.6) FC
Red
If the break is in a gas line that is reported to be over 2inch in diameter, the incident should __________. (pg.14) FC
Be upgraded to a hazardous materials response
Clamping or crimping a leak should only be considered on lines that are ___ or smaller. (pg.16) FC
¾ in
What is the primary tactic used to remove gas in a gas leak? (pg.20) FC
Natural Ventilation
Most commercial and all residential appliances use gas at a pressure of ___ to ___ psi. (pg.21) FC
½ to ¼
Propane density is 1.56, making it _____ than air. (pg.25) FC
Heavier
CO has LEL of ___ and UEL of ___. (pg.28) FC
12.8% and 74%
TWA of CO is ___ppm over and ___ hour span, and ___ppm over ___hour. (pg.28) FC
35ppm / 8hr 50ppm / 1hr
Electricity has what two basic properties? (pg.31) FC
Voltage and Current
The most hazardous conditions involving power lines are where the lines ______. (pg.36) FC
Do not come in contact with the ground
Current is measured in ____ and is the amount of electricity flowing through a wire or conductor. (pg.31) FC
Amps or amperes
What is a BLEVE? -SB
Boiling Liquid Expanding Vapor Explosion. (p. 2)
) ________ means something is designed to be incapable of producing heat or spark sufficient to ignite an explosive atmosphere. -SB
Intrinsically Safe. (p. 2)
How many color codes does the APWA have to identify underground utilities? -SB
- (p. 6)
What color denotes an underground gas line? -SB
Yellow. (p. 6)
What color denotes an underground electric line? -SB
Red. (p. 6)
In Virginia, MISS Utility can also be accessed by dialing _____. -SB
8 1 1. (p. 7)
Having a vapor density of .55, methane (natural gas) will _____ when escaping. -SB
Rise. (p.8)
Natural gas in its pure state is colorless and odorless. __________ is a pungent odorant that is added as a safety precaution after it is received at the distribution site. -SB
Mercaptan. (p. 8)
The flammable range for natural gas is between ____ and ___. -SB
5%; 15%. (p. 8)
The ignition temperature for natural gas is about ______. -SB
1200 ° F. (p. 8)
The expansion ratio of liquified natural gas to a gas is _____. -SB
600:1. (p. 8)
Gas lines can generate _______ to _______ volts of static electricity. -SB
2,000; 24,000. (p. 8)
Markers show the pipelines _______ location; not its ____ location. -SB
Approximate; Exact. (p. 10)
The proper sequence for shutting off the utility in either a leak or fire situation is? -SB
At the appliance, at the meter, at the curb. (p. 12)
For outside gas leaks and other outside gas emergencies, engine companies shall position apparatus ______ and ______ of the hazard area.
Prior to; upwind. (p. 13)
The general rule for apparatus positioning is no closer than _____ for the first arriving unit and a minimum distance of _______ for all other incoming fire apparatus. -SB
100 feet; 300 feet. (p. 13)
What are the resources for the initial alarm on an outside gas leak? -SB
1 engine, 1 Truck or rescue. (p. 14)
In most cases if the leak is prior to a shut off, one of the best courses of action is _____. -SB
No action. (p. 15)
True or False: To quickly control a gas leak, you should identify and close any and all appropriate street valves. -SB
False. DO NOT OPERATE ANY STREET VALVES. May result in another emergency remote from the scene. (p. 15)
The initial alarm for an inside gas leak is ________. -SB
2 engines, 1 truck or rescue, 1 BC. (p. 19)
The key to turning off gas services in any structure is locating the ______. -SB
Regulator. (p. 21)
Operating valves located in street boxes and manholes may actually ______ to customers’ service. -SB
Increase Pressure. (p. 23)
Propane has an expansion ratio of _____. -SB
270:1. (p. 25)
________ is formed by the incomplete combustion of the fossil fuels- gas, oil, coal, and wood. -SB
Carbon Monoxide. (p. 28)
The resources for a Carbon Monoxide emergency is________. -SB
1 engine company, 1 EMS unit. (p. 28)
During a CO emergency, any person who enters the structure above ___ shall have full turnout gear, including SCBA donned. -SB
35 ppm. (p. 30)
Electricity has two basic properties: ______ and ______. -SB
Voltage; Current. (p. 31)
In electricity there is _______ which has the potential for making you a part of a circuit. -SB
Step potential. (p. 32)
The most hazardous conditions involving power lines are where the lines _____________. -SB
Do Not come in contact with the ground. (p. 36)
Fire Dept personnel _______ the scene of any wires down incident in which the wires are actively arcing. -SB
Should not leave. (p. 36)
What to the pole numbers mean on utility poles? -SB
Top line is the map grid; the second line is the specific pole number. (p. 36)
An __________ is an intermediate space located between regular-use floors, commonly located in hospitals and laboratory-type buildings to allow space for the mechanical systems of the building. -SB
Interstitial Space. (p. 41)
