Environmental & Hazard Management Flashcards
7 cards from real PC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Environmental & Hazard Management flashcards as text
Which type of backflow preventer is required on a connection to a high-hazard cross-connection such as a chemical feed line?
Answer: Reduced pressure zone (RPZ) assembly
An RPZ (reduced pressure zone) assembly provides the highest level of backflow protection and is required for high-hazard cross-connections.
What is the purpose of a grease trap in a commercial kitchen's plumbing system?
Answer: Intercept fats, oils, and grease before they enter the sewer
Grease traps capture fats, oils, and grease (FOG) to prevent sewer clogs and environmental contamination.
When trenching near underground utilities, which minimum safe distance should a plumber maintain before hand-digging?
Answer: 18 inches
Excavation within 18 inches of a marked utility line must be done by hand to avoid striking the utility.
What does the term 'air gap' refer to in plumbing backflow prevention?
Answer: A vertical separation between a water outlet and flood level rim
An air gap is the unobstructed vertical distance between the water supply outlet and the flood level of a fixture, preventing backflow by physical separation.
Which regulation requires plumbers to notify the local water authority before making connections to a public water main?
Answer: Clean Water Act cross-connection control programs
Cross-connection control programs under the Safe Drinking Water Act and Clean Water Act require notification before connections to public water mains.
A plumber is replacing a toilet in a home built before 1978. What hazardous material should be assumed present in the surrounding materials?
Answer: Asbestos and lead paint
Homes built before 1978 commonly contain lead-based paint and potentially asbestos in pipe insulation, flooring, and joint compounds.
What is the correct method for disposing of old mercury-containing float switches removed from a water tank?
Answer: Take to a household hazardous waste facility
Mercury is a hazardous substance and must be disposed of at a certified household hazardous waste collection facility, not in regular trash or drains.