单项选择题
A.overspeed trip B.audible/visual alarm C.the ships/boats general alarm D.reserve oil storage tank
A viscous damper, as used on a marine diesel, is a seal...
单项选择题A viscous damper, as used on a marine diesel, is a sealed precision built device which dampens the torsional vibrations in the （）.
A.camshaft B.flywheel C.crankshaft D.thrust shaft
A diesel engine is operating at 1800 RPM and driving a ...
单项选择题A diesel engine is operating at 1800 RPM and driving a propeller at 600 RPMWhat is the speed reduction ratio?（）
A.030 to 1 B.300 to 1 C.333 to 1 D.330 to 1
High diesel engine cooling water temperatures can be ca...
单项选择题High diesel engine cooling water temperatures can be caused by （）.
A.air in the cooling system B.an overhauled water pump C.correct amount of coolant D.no air in the cooling system
