Which of the following statements concerning the lubrication of diesel propulsionengines used in vessels over 300 gross tons is most accurate? ( )
A.Lubrication systems using engine driven lube oil pumps do not require any additionalindependent arrangement when such arrangements have been proven reliable.
B.The use of engine driven pre-lube pumps is permitted on vessels with propulsionsystems developing less than 500 shaft horsepower.
C.When forced lubrication is used for propulsion engines , one independently drivenstandby pumps is to be provided in addition to the necessary pumps for normaloperation.
D.Lubrication systems where two oil coolers are fitted require a minimum of twotemperature control devices which may be actuated by similar sensors.
正确答案：C解析：gross:总的毛的;accurate：精确的;additional:附加的;independent：独立;arrangement：布置安排;reliable：可靠的;device：设备;actuate：开动;similar：类似的;sensor：传感器译文：关于使用在300总吨以上的船舶上的柴油机滑油的陈述下列哪个最准确?如果推进柴油机是强制润滑的那么除了正常运行必要的那台泵之外还应该有一台独立驱动的备用泵
