1.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.
2.润滑油系统（lubrication system）
3.英译汉：gearbox ratio
4.The common method of applying oil to the cylinder walls is by means of small pump assembled in units, known asA.mechanical lubricatorB.lubrication functionC.forced feed systemD.bearing lubrication
第1题：
英译汉：production
第2题：
英译汉：lubrication
