On a four-stroke diesel engine, when t

1、In a diesel engine, when refitting pi

In a diesel engine, when refitting piston rings you should （）Ⅰ.check the ring gap at the smallest diameter of the cylinderⅡ. Remove carbon from the ring grooveAⅠ onlyBⅡ onlyCboth Ⅰ and ⅡDneither Ⅰ nor Ⅱ

2、In a four-stroke cycle diesel engine t

In a four-stroke cycle diesel engine the intake valves open （）Abefore TDC and close after BDCBafter TDC and close after BDCCbefore TDC and close before BDCDafter TDC and close before BDC

3、When a diesel engine compression press

When a diesel engine compression pressure is checked, the indicator is connected to the （）Acylinder exhaust portsBinjection lineCcylinder indicator cockDbanjo oiler line

4、A supercharged diesel engine when comp

A supercharged diesel engine when compared to a similar naturally aspirated diesel engine, will develop an increase in （）Aignition lagBengine horsepowerClube oil system pressureDspecific fuel consumptio

5、If a four-stroke/cycle diesel engine i

If a four-stroke/cycle diesel engine is started by injecting air into the cylinder, the pistons receiving the charge of starting air must be（）Aon the power strokeBon the exhaust strokeCat the end of the power strokeDat the start of the intake stroke

6、In a diesel engine, when installing n

In a diesel engine, when installing new piston rings it is important to check（）Ⅰ.ring gap clearanceⅡ.side clearanceAⅠ onlyBⅡ onlyCboth Ⅰ and ⅡDneither Ⅰnor Ⅱ