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。
