The engine has one or two group of fuel pumps, depending upon （）.

[单选题]For one or two types of engine, the piston and rod can be withdrawn downwards from the cylinder into the crankcase and then out through the （）.A . cylinder casingB . cylinder boreC . crankcase doorD . aperture in the cylinder block

[单选题]For one or two types of engine,the piston and rod can be withdrawn downwards from the cylinder into the crankcase and then out through （）.A . the cylinder coverB . the bottom of bed-plateC . the sumpD . the crankcase door

[单选题]8． My sister has two skirts． One is yellow，_________ is black．A． otherB． anotherC． othersD． the other

[单选题]When considering two mutually exclusive capital budgeting projects with con

[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]Engine fuel pump index is （）.A . the viscosity indexB . the fuel oil contentsC . the starting speedD . the reading at the rack

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

[单选题]The engine in a covered lifeboat is fueled with（）.A . keroseneB . unleaded gasolineC . diesel oilD . liquefied ga

[单选题]Re-circulating the fuel when the engine is stopped can______.①keep the fuel at the correct viscosity ②cool the injectorA．①B．②C．①②D．neither ① nor ②

[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