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Electrical Safety Handbook > 7.0 Electrical Hazards in Firefighting In Houses/buildings > Flashcards

7.0 Electrical Hazards in Firefighting In Houses/buildings Flashcards

1
Q

What is the primary reason for leaving the power and lights on when fighting fires in buildings?
a. To save electricity
b. To facilitate evacuation, rescue, and firefighting operations
c. To enhance visibility during firefighting
d. To minimize electrical hazards

A

B

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2
Q

What is the recommended approach when walking in limited visibility near live electrical equipment?
a. Walk with the palms of your hands facing away
b. Crawl to minimize exposure
c. Walk with the palms of your hands facing towards you
d. Use electrical insulation gloves

A

C

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3
Q

What is the minimum distance that rescuers or firefighters should maintain from overhead power lines when working from an aerial device?
a. 1 meter (3 feet)
b. 2 meters (7 feet)
c. 3 meters (10 feet)
d. 5 meters (16 feet)

A

C

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4
Q

What precaution should be taken when setting up aerial equipment in close proximity to power lines?
a. Use a second firefighter as a dedicated signaller/observer
b. Work quickly to minimize exposure time
c. Avoid communication with the operator
d. Keep tools and equipment untied for quick access

A

A

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5
Q

What extra precautions should be taken when working overtop power lines with aerial equipment?
a. Increase the speed of hydraulic movements
b. Avoid tying tools and equipment
c. Maintain normal working procedures
d. Move hydraulics slowly to minimize bouncing and swaying

A

D

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6
Q

What is the recommended distance to keep from the service drop when working around a building?
a. 30 centimeters (1 foot)
b. 1 meter or more (3.5 feet)
c. 2 meters (7 feet)
d) 5 meters (16 feet)

A

B

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7
Q

Why should caution be exercised when shutting off the main power switch to a building?
a. The switch is difficult to operate
b. The “line side” of the switch and incoming wires are still energized
c. Shutting off the main power switch may cause an explosive flash
d. It may damage the electrical equipment

A

B

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8
Q

What precaution is recommended when turning off the main power switch to a building?
a. Use wet gloves for better grip
b. Turn off the switch quickly to minimize exposure c. Wear dry leather gloves and use the left hand
d. Have a backup person assist in turning off the switch

A

C

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9
Q

Why is it important to shut off individual circuits first in commercial and industrial settings with 600-volt systems?
a. To save energy
b. To reduce the likelihood of an explosive flash
c. To test the circuit breakers
d. To isolate the power source

A

B

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10
Q

What should Emergency Responders do after shutting off electrical hazards?
a. Turn on (reenergize) the equipment
b. Leave the breakers in the off position
c. Contact the Electrical Safety Authority for inspection
d. Pull the meter to guarantee power interruption

A

B

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11
Q

Why is pulling the meter not a recommended method for disconnecting power?
a. It may damage the meter
b. It guarantees power interruption
c. It can violently arc or explode
d. It is time-consuming

A

C

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12
Q

What should Emergency Responders do after shutting off electrical hazards in a wet or flooded building?
a. Turn on (reenergize) the equipment
b. Leave the breakers in the off position
c. Call the local electrical utility for inspection
d. Pull the meter to guarantee power interruption

A

B

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13
Q

Why is it important to shut off power before entering a wet or flooded building?
a. To save energy
b. To prevent explosive flashes
c. To test the circuit breakers
d. To reduce humidity

A

B

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14
Q

What signs might indicate electrically charged floors in a flooded building?
a. Unconscious victims
b. Unusual sparking
c. Persons receiving shocks
d. All of the above

A

D

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15
Q

What is the recommended practice when working in flooded basements or on wet floors?
a. Avoid shutting off power
b. Enter immediately to assess the situation
c. Shut off power before entry
d. Use water to control potential hazards

A

C

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16
Q

Why is it important to determine if emergency or portable generators are in use in a flooded building?
a. To save energy
b. To assess the building’s power needs
c. To prevent generator theft
d. To ensure they are shut off or disconnected

A

D

17
Q

What precautions should emergency responders take when accessing electrical vaults in high-rise buildings?
a. Wear short-duration SCBA
b. Remove anyone from inside the vault immediately
c. Access the vault without notifying the local utility
d. Wear long-duration SCBA and have a well-planned escape route

A

D

18
Q

What action should be taken if thick black smoke is emitting from a ventilation grate on the sidewalk?
a. Open the vault doors marked “DANGER HIGH VOLTAGE”
b. Call the electrical utility and inform them of the fire
c. Remove the ventilation grate to assess the situation
d. Enter the vault to rescue potential victims

A

B

19
Q

Why might many houses, commercial and office buildings in Canadian winters have portable or emergency generators?
a. To reduce energy consumption
b. To supply electricity during power interruptions
c. To test electrical circuits
d. To support renewable energy sources

A

B

20
Q

What is the purpose of a transfer device for portable or emergency generators in homes, commercial, and industrial settings?
a. To limit the generator’s power supply
b. To prevent the generator from starting
c. To control the lights in the building
d. To connect the generator directly to the meter base

A

A

21
Q

Where can an approved transfer device be connected in homes, commercial, and industrial settings?
a. Directly onto the meter base
b. Only inside the main panel
c. Exclusively in the basement
d. Attached to light fixtures

A

A

22
Q

What should firefighters check during an emergency situation involving a portable or emergency generator?
a. The generator’s fuel level
b. The throw switch’s lights or position
c. The generator’s warranty
d. The building’s insulation

A

B

23
Q

Why is a transfer device required by the Ontario Electrical Safety Code for portable or emergency generators?
a. To reduce noise from generators
b. To ensure proper ventilation
c. To avoid life-threatening hazards from incorrect wiring
d. To maximize energy efficiency

A

C

24
Q

What action should be taken if there is no transfer device found between the main panel and the generator during an emergency situation?
a. Turn off the lights in the building
b. Turn off the generator to eliminate electrical backfeed
c. Increase the generator’s power supply
d. Disconnect the meter base

A

B

25
Q

During inspection activities, what should be confirmed if a portable or emergency generator is present?
a. Fuel type of the generator
b. Presence of a transfer device
c. Number of electrical outlets in the building
d. Color of the generator’s casing

A

B

Electrical Safety Handbook (9 decks)

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