BD Marine Engineer Class 2 (Second Engineer) Practice Questions - Bangladesh DoS Marine Engineer Officer Class 2 (Second Engineer) Certificate Of Competency Exam

A normal, beneficial vibration that occurs at full load and improves scavenge air delivery An unstable, pulsating reverse flow through the compressor when air demand is too low for the pressure the compressor is trying to develop, causing vibration and potential mechanical damage A condition caused only by excess fuel injection that has no effect on the turbocharger itself A deliberate operating mode used during maneuvering to increase engine response