MTC Emissions Control & Environmental Compliance 3

Question 1

Which MARPOL Annex governs the prevention of air pollution from ships, including NOx and SOx emissions?

Accepted Answer

Annex VI

Answer

MARPOL Annex VI, adopted in 1997 and entering into force in 2005, specifically addresses prevention of air pollution from ships.

Question 2

When a marine technician replaces an engine that does not comply with current EPA emission standards, what must be demonstrated?

Accepted Answer

Replacement engine meets applicable Tier standards

Answer

EPA requires replacement engines to comply with the emission standards (Tier level) applicable at the time of the replacement, not the original installation.

Question 3

What is the primary purpose of an Exhaust Gas Recirculation (EGR) system on a marine diesel engine?

Accepted Answer

Reduce NOx by lowering combustion peak temperature

Answer

EGR recirculates a portion of exhaust gas back into the intake, diluting oxygen content and lowering combustion temperatures to reduce NOx formation.

Question 4

A vessel's Bunker Delivery Note (BDN) must be retained onboard for a minimum of how many years under MARPOL Annex VI?

Accepted Answer

3 years

Answer

MARPOL Annex VI requires the Bunker Delivery Note to be kept onboard for at least three years for port state control inspection.

Question 5

Which type of marine refrigerant is now prohibited under EPA Section 608 regulations due to its high ozone depletion potential?

Accepted Answer

CFCs (e.g., R-12)

Answer

CFCs such as R-12 (Freon) are prohibited under EPA Section 608 and the Montreal Protocol due to their severe ozone depletion potential.

(MTC) Marine Technician Certification Practice Test

(MTC) Marine Technician Certification Practice Test

MTC Emissions Control & Environmental Compliance 3