GPT Safety Procedures & PPE 2 — Questions and Answers
Question 1: When working in a confined space with potential gas accumulation, what type of respiratory protection is required?
- Dust mask (N95)
- Self-Contained Breathing Apparatus (SCBA) (Correct answer)
- Half-face air-purifying respirator
- Surgical mask
Correct answer: Self-Contained Breathing Apparatus (SCBA)
SCBA provides independent air supply and is required in IDLH (Immediately Dangerous to Life or Health) atmospheres where gas may displace oxygen.
Question 2: What is the lower explosive limit (LEL) percentage at which a gas technician must immediately evacuate an area?
- 5% LEL
- 10% LEL (Correct answer)
- 25% LEL
- 50% LEL
Correct answer: 10% LEL
Per OSHA and industry standards, technicians must evacuate when gas concentration reaches 10% LEL to maintain a safe margin below the explosive range.
Question 3: Which glove material provides the best protection against natural gas and petroleum-based compounds during pipe work?
- Latex rubber gloves
- Cotton work gloves
- Nitrile gloves (Correct answer)
- Vinyl gloves
Correct answer: Nitrile gloves
Nitrile gloves offer superior resistance to hydrocarbons and petroleum-based substances compared to latex or vinyl alternatives.
Question 4: A gas technician discovers a suspected leak inside a building. What is the FIRST action they should take?
- Call the gas company from inside the building
- Turn off the main gas valve at the meter
- Ventilate by opening windows and doors
- Eliminate ignition sources and evacuate occupants (Correct answer)
Correct answer: Eliminate ignition sources and evacuate occupants
Eliminating ignition sources and evacuating is the first priority to prevent explosion before any other corrective action.
Question 5: What class of hard hat is required when working near energized electrical equipment during gas pipe installation?
- Class A
- Class B (Correct answer)
- Class C
- Class G
Correct answer: Class B
Class B hard hats are rated for high-voltage electrical protection up to 20,000 volts and are required near energized equipment.
Question 6: When using a pipe wrench on a gas fitting, what safety practice prevents the wrench from becoming an ignition source?
- Apply petroleum jelly to the wrench jaws
- Use a non-sparking wrench made of aluminum-bronze alloy (Correct answer)
- Cover the wrench in rubber tape
- Use only ratchet-style wrenches
Correct answer: Use a non-sparking wrench made of aluminum-bronze alloy
Non-sparking tools made from aluminum-bronze or beryllium-copper alloys prevent ignition sparks when working in potentially flammable gas atmospheres.
Question 7: What is the purpose of bonding and grounding gas piping systems during installation or repair work?
- To improve gas flow rate through the pipe
- To prevent static electricity buildup that could ignite gas vapors (Correct answer)
- To meet building permit requirements only
- To reduce corrosion on pipe exterior
Correct answer: To prevent static electricity buildup that could ignite gas vapors
Bonding and grounding dissipate static electrical charges that could accumulate and spark, potentially igniting gas vapors during work.
GPT Safety Procedures & PPE 2
When working in a confined space with potential gas accumulation, what type of respiratory protection is required?