With VIT the start of injection may be （） as the engine load is reduced within a certain range.

[单选题]A diesel engine may be hard to start if the （）A . air intake is restrictedB . engine is cranked too fastC . vibration dampener is faultyD . exhaust back pressure is low

[单选题]Teachers who adont the __________model for reading comprehension may start

[单选题]VIT means （）A . variable injection timingB . variable inlet tonnageC . vertical incoming tonnageD . vertical inlet tank

[单选题]B．ecause the timing of injection is crucial, _____ mounted on the camshaft, which is driven by the crankshaft are used to operate the fuel pumps, one of which is provided for each cylinder.A．gearsB．ramsC．barrelsD．cams

[单选题]There is an injection pump for each cylinder, which is usually operated once every cycle by （） on the camshaft.A . a gearB . a camC . a rodD . a miler

[单选题]The sequence of fuel injection into cylinders is determined by （）.A . the steeringB . the driven gearC . the turning gearD . the timing gear

[单选题]If the needle valve in a fuel injection nozzle sticks open （）.A . no fuel will be delivered through the nozzleB . the nozzle will overheat and crackC . time of injection will changeD . fuel will leak into the drain line

[单选题]哪种Vit参与氨基转移（）A . 硫辛酸B . VitB1C . VitB2D . 泛酸E . VitB6

[单选题]With VIT unit the timing of fuel injection of an engine can be regulated automatically according to the （）.A . ship draftB . pitchC . engine loadD . oil viscosity

[单选题]If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, ignition may be delayed because theA．cylinder compression pressure may not be high enoughB．cylinder compression temperature may be too highC．fuel oil injection press