In a diesel engine lube oil system, which of the following parts should be lubricated first?（）

[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 fuel oil system for a diesel engine can be considered in two parts--the fuel supply and the （） systems.A . fuel treatmentB . fuel combustionC . fuel injectionD . fuel separating

[单选题]Dirt in the fuel oil system of a diesel engine can cause （）.A . clogged filtersB . poor combustionC . overloading of the dieselD . shock of fuel line

[单选题]A dirty diesel engine oil filter element can best be detected by （）.A . visual inspection of the elementsB . the pressure drop across the filterC . high lube oil sump temperatureD . decrease in oil viscosity from the filter

[单选题]In a diesel engine cooling water system, a pH of 60 indicates a/an （）.A . slightly acidic conditionB . slightly alkaline conditionC . overtreatment of waterD . neutral condition of water

[单选题]A diesel engine cooling water system with a pH factor of 30 indicates a condition of （）.A . slight acidityB . slight alkalinityC . excessive alkalinityD . excessive acidity

[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

[主观题]What causes the lube oil pressure of the engine to drop ?

[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]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