The pH value of water in a diesel engi

1、The rate of fuel injection in a diesel

The rate of fuel injection in a diesel engine cylinder depends primarily on （）.Athe size of the holes in the fuel nozzleBtiming of the pumpCsupply pressure to the pumpDshape of the combustion chamber

2、The burning of fuel oil in a diesel en

The burning of fuel oil in a diesel engine having a high sodium content, will cause （）Acorrosion and grooving of exhaust valvesBcorrosion and...

3、The rate of heat transfer in a water-t

The rate of heat transfer in a water-tube auxiliary boiler can be increased by （）.Aoperating the boiler at less than normal water levelBinsta...

4、Excessive alkalinity of the water in a

Excessive alkalinity of the water in an auxiliary boiler can cause （）.Acaustic embrittlement of the boiler metalBacidic corrosion of the boiler metalChard scale deposits on the boiler tubesDetching of the heat exchange surface

5、Air in the fuel lines of a diesel engi

Air in the fuel lines of a diesel engine can cause （）Aignition failureBoxygen corrosion of the fuel linesCthe pistons to seizeDblue smoke

6、The correct pH value of boiler water i

The correct pH value of boiler water is achieved by continuous addition of a suitable （） to the feed.AacidBalkaliCsaltDNone of the above