NANTeL Industrial and Fire Safety 2 — Questions and Answers
Question 1: Which class of fire extinguisher is specifically rated for use on electrical equipment fires?
- Class A
- Class B
- Class C (Correct answer)
- Class D
Correct answer: Class C
Class C extinguishers use non-conductive agents and are rated for energized electrical equipment fires.
Question 2: In a nuclear facility, what does the acronym 'LOTO' stand for in the context of industrial safety?
- Limit Output, Test Operations
- Lockout/Tagout (Correct answer)
- Low Output Thermal Operations
- Lock Open, Tag Off
Correct answer: Lockout/Tagout
LOTO stands for Lockout/Tagout, the procedure to de-energize and isolate equipment before maintenance.
Question 3: What is the minimum safe distance rule often applied when working near energized overhead power lines in an industrial setting?
- 3 feet
- 6 feet
- 10 feet (Correct answer)
- 25 feet
Correct answer: 10 feet
OSHA generally requires maintaining at least 10 feet of clearance from overhead power lines up to 50kV.
Question 4: A flammable liquid storage cabinet at a nuclear plant is required to limit its contents to a maximum of how many gallons?
- 25 gallons
- 60 gallons (Correct answer)
- 120 gallons
- 250 gallons
Correct answer: 60 gallons
OSHA and NFPA standards limit flammable liquid storage cabinets to 60 gallons of Class I and II liquids.
Question 5: During a fire drill at a nuclear plant, the LAST action personnel should take before evacuating a room is:
- Gather personal belongings
- Close doors to slow fire spread (Correct answer)
- Silence the local alarm panel
- Verify their badge is scanned out
Correct answer: Close doors to slow fire spread
Closing doors helps contain fire and smoke, reducing spread and giving evacuation routes more protection.
Question 6: What hazard does the IDLH value define for a chemical substance in an industrial environment?
- Ignition temperature in open air
- Immediately Dangerous to Life or Health concentration (Correct answer)
- International Daily Limit for Humans
- Ionizing Dose Level Hazard
Correct answer: Immediately Dangerous to Life or Health concentration
IDLH is the airborne concentration that poses an immediate threat to life or health or could impair the ability to escape.
Question 7: Which fire suppression system agent is commonly used in nuclear plant cable spreading rooms due to its ability to suppress fire without damaging sensitive equipment?
- Foam
- Dry chemical powder
- CO2 or clean agent (e.g., FM-200) (Correct answer)
- Water mist
Correct answer: CO2 or clean agent (e.g., FM-200)
CO2 and clean agents like FM-200 suppress fires without leaving residue that could damage electronics or cables.
NANTeL Industrial and Fire Safety 2
Which class of fire extinguisher is specifically rated for use on electrical equipment fires?