Emissions Control & Environmental Compliance Flashcards

Under MARPOL Annex VI, what is the global sulfur cap for marine fuel oil that took effect on January 1, 2020?

Answer: 0.50% m/m

MARPOL Annex VI reduced the global sulfur limit in marine fuel oil from 3.50% to 0.50% m/m effective January 1, 2020.

Which EPA Tier classification applies to new marine diesel engines with rated power ≥600 kW installed in vessels after 2014?

Answer: Tier 4

EPA Tier 4 standards apply to recreational and commercial marine diesel engines ≥600 kW produced after 2014, requiring significant NOx and PM reductions.

A vessel operating in a North American Emission Control Area (ECA) must use fuel with a maximum sulfur content of:

Answer: 0.10%

Within the North American ECA, MARPOL Annex VI requires fuel sulfur content not to exceed 0.10% m/m.

Which document must be maintained onboard to record the management of oily water separator (OWS) discharges?

Answer: Oil Record Book Part I

MARPOL Annex I requires vessels to maintain an Oil Record Book Part I documenting all machinery space oil operations including OWS discharges.

What is the maximum allowable oil content in bilge water discharged outside special areas under MARPOL Annex I?

Answer: 15 ppm

MARPOL Annex I permits overboard discharge of bilge water outside special areas only when oil content does not exceed 15 ppm.

Selective Catalytic Reduction (SCR) systems on marine engines primarily reduce which exhaust emission?

Answer: Nitrogen oxides (NOx)

SCR systems inject urea (AdBlue/DEF) into the exhaust stream, converting NOx into nitrogen and water vapor.

Under the Clean Water Act, which federal permit program regulates discharges of pollutants from vessels into U.S. navigable waters?

Answer: NPDES

The National Pollutant Discharge Elimination System (NPDES) under the Clean Water Act requires permits for vessel discharges into U.S. waters.