The fuel oil system for a diesel engine can be considered in two parts--the fuel supply and the （） systems.

[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]In a diesel engine lube oil system, which of the following parts should be lubricated first?（）A . Camshaft beatingsB . Main bearingsC . Piston crownsD . Cylinder wall

[单选题]In a typical fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.A . a service tankB . a collecting tankC . a sumpD . a settling tank

[单选题]On a diesel engine, fuel is delivered into the combustion space by （）.A . a cooling systemB . a lubrication oil systemC . an electric systemD . an injection system

[单选题]In an ordinary diesel engine the fuel injection begins （）A . after TDCB . before TDCC . after BDCD . before BDC

[单选题]If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will_________.A．backfire through the air intakesB．develop less power under loadC．have high firing pressuresD．li

[单选题]In a diesel engine, fuel must be broken up into a spray of fine droplets to （）.A . increase its qualityB . obtain complete burningC . reduce its weightD . all of the above

[单选题]Fuel is admitted to a diesel engine cylinder through the （）.A . intake valvesB . carburetorC . exhaust portsD . injector nozzle

[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]In a typical fuel system, the oil is stored in （） in the double bottom.A . setting tanksB . service tanksC . tanksD . drain tank