单项选择题
A.crosshead B.crown C.piston rod D.connecting rod
Medium speed engines have a （） power to weight ratio th...
单项选择题Medium speed engines have a （） power to weight ratio than the slow speed two strokes, but due to the higher speeds tend to have （） maintenance intervals.
A.higher；reduced B.higher；increased C.lower；reduced D.lower；increased
（） allows the engine to be placed wherever is most suit...
单项选择题（） allows the engine to be placed wherever is most suitable, as they no longer have to be aligned with reduction gearing and shafting as is the case with conventional installations.
A.Diesel engine propulsion B.Diesel electric propulsion C.Steam engine propulsion D.Gas turbine propulsion
（） can be found on most medium to large merchant vessel...
单项选择题（） can be found on most medium to large merchant vessels even if the main engine is either a steam turbine or 2-stroke crosshead engine.
A.The medium speed 4-stroke trunk piston engine B.The low speed 2-stroke crosshead engine C.The medium speed 2-stroke crosshead engine D.The low speed 4-stroke trunk piston engine
