Safety Procedures & PPE Flashcards

When working in a confined space with potential gas buildup, which atmospheric condition requires immediate evacuation?

Answer: Oxygen level below 19.5%

OSHA defines oxygen-deficient atmosphere as below 19.5%, requiring immediate evacuation and supplied-air respirators.

Which type of respirator is required when soldering copper pipes in an enclosed space with inadequate ventilation?

Answer: Half-face air-purifying respirator with organic vapor cartridge

Soldering flux fumes contain harmful organic vapors that require an air-purifying respirator with organic vapor cartridges.

A plumber is about to cut into a wall in a pre-1978 building. What hazard must be assessed first?

Answer: Asbestos or lead paint

Buildings constructed before 1978 may contain lead-based paint and asbestos insulation, requiring assessment before any disturbance.

What is the correct procedure when a plumber's clothing catches fire while using a torch?

Answer: Stop, drop, and roll

Stop, drop, and roll smothers flames by cutting off oxygen; running fans the fire and spreads it.

Which safety device must be used when soldering or brazing near combustible materials like wood framing?

Answer: Fire blanket or heat shield

A fire blanket or heat shield protects combustible framing from torch heat and prevents structure fires.

How should a plumber safely handle a pressurized pipe that needs to be cut?

Answer: Depressurize and drain the line before cutting

Lines must be fully depressurized and drained before cutting to prevent sudden release of water, steam, or gas.

What class of fire extinguisher should be accessible when performing gas line work?

Answer: Class B

Class B extinguishers are designed for flammable liquid and gas fires, making them appropriate for gas line work.