Utility Emergencies

Question 1

A momentary outage is an electrical outage lasting how long

Answer 1

Two minutes or less

Question 2

what is a pothead?

Answer 2

A device that provides a transition between underground cable and overhead lines or conductors

Question 3

primary electric service delivers how many volts to a distribution transformer, which in turn reduces voltage to secondary levels

Answer 3

2,000 to 50,000 V

Question 4

secondary electric service carries less than how many volts. Most residential and business customers receive electric electricity from secondary distribution loans.

Answer 4

2000 V

Question 5

A gases flammability limits and _______ represent its physical characteristics with the greatest impact on emergency operations

Answer 5

Vapor density

Question 6

A one percent drop in the oxygen concentration is equal to how many parts per million

Answer 6

50,000

Question 7

propane has an expansion ratio of what

Answer 7

270:1

Question 8

mercaptan - regulation stipulate that a person with a normal sense of smell should be able to detect a concentration in air of what percent of the LEL

Answer 8

20%

Question 9

Pipeline markers list what three things

Answer 9

commodity transported
The name of the pipeline company
A telephone number where company reps can always be reached

Question 10

most commercial and all residential appliances use gas at a pressure of what

Answer 10

1/2 to 1/4 psi

Question 11

LEL operational action levels are as follows: in what percentage range do we investigate the area in full PPE

Answer 11

0 to 10

Question 12

LEL operational action levels are as follows: in what percentage range do we continue to investigate utilizing SCBA

Answer 12

10 to 25

Question 13

LEL operational action levels are as follows: above what percentage do we evacuate, secure, utility from the structures, exterior, and perform exterior natural ventilation

Answer 13

25%

Question 14

During gas, utility emergencies, gas concentrations higher than what percentage of the LEL and CO levels greater than how many parts per million indicating an IDLH

Answer 14

10% of the LEL
1200 ppm of CO

Question 15

What are five gas utility situations that should queue the IC to request additional resources?

Answer 15

known rescues
Uncontrollable gas leaks
Fire involving pressurized containers
Outside gas leaks involving 2 inch diameter, pipes or larger
Incident involving multiple occupancies

Question 16

FD personnel must ensure all persons follow OSHA excavation standards dictating no person should enter an unshored trench deeper than how many feet

Answer 16

5

Question 17

generally, residential levels of CO should not exceed how many parts per million over an eight hour

Answer 17

5 ppm

Question 18

at CO levels greater than ______ PPM, any persons who enters the structure must wear full turnout gear, including donned SCBA

Answer 18

100 ppm

Question 19

One transformer normally carries up to how many house

Answer 19

10

Question 20

what are the four main types of injuries from electrical systems?

Answer 20

Electrocution
Electric shock
Burns
Falls

Question 21

Many transformers labeled non-PCB contain up to what percent PCB contents

Answer 21

10%

Question 22

when confronted with an occupied vehicle that is in contact with downed wire wires personnel should stay ______ feet away from the vehicle until the power can be locked out

Answer 22

30 feet

Question 23

The Virginia state corporation commission approved the ______________________ color codes to Mark underground utilities

Answer 23

American public works associations

Question 24

The American public Works Association uses which color for electric, cable, conduit, and lighting cable

Answer 24

red

Question 25

The American public Works Association uses, which color for gas, oil, steam, petroleum, or gaseous materials

Answer 25

Yellow

Question 26

The American public Works Association uses which color for communications, alarm, signal lines, cable, or conduit

Answer 26

Orange

Question 27

The American Public Works Association uses, which color for potable water

Answer 27

Blue

Question 28

The American Public Works Association uses which color for reclaimed water, irrigation, and slurry lines

Answer 28

Purple

Question 29

The American Public Works Association uses which color for sewer and drain lines

Answer 29

Green

Question 30

The American public works Association uses, which color for temporary survey markings

Answer 30

Pink

Question 31

The American public Works Association uses which color for proposed excavation

Answer 31

White

Question 32

What type of fire results from a damaged electric vehicle battery pack?

Answer 32

Class D

Question 33

what is the highest voltage level typically found in level three electric vehicle charging stations?

Answer 33

480 V

Question 34

what are typical high and low alarms for CO levels?

Answer 34

Manufacturers typically set CO alarm threshold at 35 P p.m. for the low alarm and 100 PPM or higher for the high alarm

Question 35

what are the typical high and low alarms for H2S?

Answer 35

Manufacturers usually set the low alarm for H2 S at 10 PPM and the high alarm threshold at 20 ppm

Question 36

What gas are most AMD’s calibrated to?

Answer 36

Pentane as the baseline gas for LEL

Question 37

what pressure and how much static electricity transmission lines of a pipeline operate with

Answer 37

Transmission lines range in size from 6 to 30 inches and have pressure is up to 1500 psi these lines can generate 2000 to 24,000 V of static electricity

Question 38

how deep should powerlines be buried?

Answer 38

Primary lines should be buried 30 to 36 inches below grade, secondary line should be buried 24 inches