What causes the lube oil pressure of the engine to drop ?

[单选题]The quality of the fuel oil and lube oil （）, Im afraid.A . has much to do with the operation of the engine and its lifeB . have much to do with the operation of the engine and its lifeC . has much doing with the operation of the engine and its lifeD

[单选题]The pressure ________ causes Americans选择Thepressure________causesAmericanstobeenergetic,butitalsoputsthemunderaconstantemotionalstrain.A．)tocompeteB)competingC)tobecompetedD)havingcompeted

[单选题]For a main diesel engine the lube oil in the bearings is drawn from （）, usually located in the bedplate.A . a gravity tankB . a sumpC . a vesselD . a bottle

[单选题]The lube oil cooler is located after the lube oil filter in order for （）A . the filter to operate more efficientlyB . the lube oil cooler to be bypassedC . positive lube oil pump suction to be assuredD . galvanic action in the cooler to be minimized

[单选题]The lube oil to lubricate the surfaces of the cylinder liners is spread over by the （）.A . sliding piston ringsB . engines camshaftC . small pumpsD . forced feed system

[单选题]The primary duty of lube oil is to reduce （） between the working parts of an engine.A . power outputB . friction and wearC . indicated pressureD . rated horsepower

[单选题]Lube oil cannot be efficiently filtered if its （）.A . viscosity is too lowB . temperature is too lowC . pump discharge pressure is higher than the systems pressureD . pump capacity is greater than the systems need

[单选题]Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an _____.A．over-speed tripB．audible/visual alarmC．the ships/boats general alarmD．reserve oil storage tank

[单选题]Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an （）.A . overspeed tripB . audible/visual alarmC . the ships/boats general alarmD . reserve oil storage tank

[单选题]If a used lube oil analysis indicates excessive chromate content, this meansA．air filtration is inadequateB．engine coolant is leaking into the lube oilC．fuel oil is leaking into the lube oilD．the piston rings are excessive worn