Chapter 8 - Hazardous Energy

Question 1

The unintended and often sudden release of stored, residual, or potential energy that will cause harm if contacted.

Answer 1

Hazardous energy

Question 2

Electrical energy that has established a path to ground through the earth and that is now energizing the ground.

Answer 2

Ground gradient

Question 3

A device that will break continuity in a circuit when grounding occurs before the current returns to the distribution source.

Answer 3

Ground Fault Interruption

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Question 4

The area surrounding a warm zone that is used for an incident command post, support agency interfacing, and staging of personnel and equipment.

Answer 4

Cold zone

Question 5

The area immediately surroundings a hazardous area that can be considered an immediately dangerous to life and health (IDLH) environment requiring appropriate PPE, accountability procedures and a standby rapid intervention crew

Answer 5

Hot zone

Question 6

The area in which no responders are allowed to enter, regardless of PPE, due to dangerous conditions.

Answer 6

No-entry zone

Question 7

The area surrounding the hot zone where personnel, equipment, and apparatus are operating in support of an operation.

Answer 7

Warm zone

Question 8

Bright orange conduit or cable can indicate ____________ is used in the drivetrain of a vehicle. (Up to ____ volts and _____ amps)

Answer 8

High-voltage power

700 volts / 125 amps

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Question 9

Bright blue conduits or cables can indicate?

Answer 9

medium voltage drivetrains

(less than high voltage systems but more than typical 12 or 24 volt systems)

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Question 10

Ethanol fuels (like E-85) are polar solvents that can render ?

Answer 10

Class B foam ineffective

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Question 11

LPG and LNG stand for?

Answer 11

Liquefied petroleum gas and liquefied natural gas

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Question 12

CNG stands for?

Answer 12

Compressed natural gas

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Question 13

CNG labels are standardized as a ____ _______ with the words “CNG” “LNG” (a BLEVE hazard) or “in-odorized CNG” within the diamond.

Answer 13

Blue diamond

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Question 14

Propane powered vehicles should have a _____ _______ with “Propane” or “LPG” within.

Answer 14

Black diamond

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Question 15

The most common location for the stored CNG or LPG fuel tanks is within the _____ ______, although they may be _____ ________ on buses.

Answer 15

frame rails/ roof mounted

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Question 16

Semi truck tractors and cargo trailers may have two more hazardous energy sources in addition to the common automotive hazards already listed: namely?

Answer 16

air brake chamber springs and split rim wheels

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Question 17

Of all the weather considerations affecting firefighting operations, ____ is by far the most important.

Answer 17

Wind

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Question 18

Lower humidity means ?

Answer 18

increased fire spread

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Question 19

PUVCE stands for?

Answer 19

Percussive unconfirmed vapor cloud explosion

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Question 20

LOTO stands for?

Answer 20

Lock-out/tag-out

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