Emissions Control & Environmental Compliance Flashcards
7 cards from real MTC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Emissions Control & Environmental Compliance flashcards as text
Under EPA regulations, what is the maximum rated power threshold below which spark-ignition (SI) outboard marine engines are classified as 'small SI' engines?
Answer: 19 kW (25 hp)
EPA classifies outboard marine SI engines below 19 kW (25 hp) as small SI engines subject to different emission regulations than larger marine engines.
Which emission is primarily targeted by the use of Diesel Particulate Filters (DPFs) in marine engine exhaust systems?
Answer: Particulate matter (PM)
DPFs trap and periodically oxidize soot particles, reducing particulate matter emissions from diesel engine exhaust.
The MARPOL Annex VI NOx Technical Code requires that what document be kept onboard to demonstrate engine compliance?
Answer: EIAPP Certificate and Technical File
Each regulated marine diesel engine must have an Engine International Air Pollution Prevention (EIAPP) Certificate and an associated Technical File documenting its NOx compliance.
A two-stroke direct fuel injection (DFI) outboard engine offers an environmental advantage over conventional carbureted two-stroke engines primarily because it:
Answer: Eliminates the scavenging losses that discharge unburned fuel
DFI technology injects fuel directly into the cylinder after the exhaust port closes, preventing unburned fuel from being swept out with exhaust gases — a major HC emission source in conventional two-strokes.
Under the Vessel Incidental Discharge Act (VIDA), which federal agency sets discharge standards for vessels operating in U.S. waters?
Answer: EPA
VIDA, enacted in 2018, establishes that EPA sets the substantive standards for incidental discharges from vessels while the USCG enforces them.
Which of the following best describes an 'Emission Control Area' (ECA) under MARPOL Annex VI?
Answer: A designated sea area where stricter limits on NOx, SOx, and PM apply
ECAs are designated sea areas established under MARPOL Annex VI where more stringent controls on sulfur oxide, nitrogen oxide, and particulate matter emissions from ships apply.
When disposing of used engine oil from a marine vessel in the United States, a technician must:
Answer: Deliver it to an approved used oil collection facility
EPA regulations require used oil to be taken to an approved recycling or collection facility; overboard discharge violates both MARPOL and the Clean Water Act.