USCG USCG Motor
Set 10 • Question #49 of 382
Launch Interactive Practice Room How many crankcase relief valves are required for a 13 inch bore, eight cylinder in line engine?
A
2
B
8
✓ Correct Answer
C
4
D
6
USCG NMC Regulatory Explanation
Oil Mist Detectors (OMD) sample crankcase atmospheres to detect microscopic oil droplets from overheating bearings before reaching explosive concentrations. Spring-loaded relief doors relieve internal pressure pulses and reseat instantly to block fresh atmospheric oxygen.
Question Discussion & Notes
0Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.
Loading mariner discussions...