Chief Engineer UFIV Practice Questions - USCG Chief Engineer Uninspected Fishing Industry Vessels (UFIV) Exam

The exhaust back-pressure limit given by an engine maker matters because excessive back pressure:

Improves scavenging and lowers exhaust temperature Impedes removal of exhaust gas, raising exhaust temperature and cutting power Raises the pressure held in the starting-air receivers Lowers the injection pressure delivered at the nozzle

Correct Answer:

Impedes removal of exhaust gas, raising exhaust temperature and cutting power

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