Each cylinder is closed at the top by

1、After the boat is at the top of the da

After the boat is at the top of the davit heads，the davit arms begin moving up the tracks and are stopped by the（）.Ahoist manBlimit switchCbrake handleDpreventer bar

2、Each cylinder is closed at the top by

Each cylinder is closed at the top by a （）, made of a special heat-resistant steel.Acylinder linerBcoupling flangeCcylinder coverDpiston crow

3、On the top of the cylinder is mounted

On the top of the cylinder is mounted the cylinder cover which is pressed onto （） of the cylinder liner by means of nuts and studs.Athe camshaftBthe flangeCthe ridgeDthe bulge

4、It is very necessary that each cylinde

It is very necessary that each cylinder （） before the charged air is compressed.Ais scavengedBis atomized with fuel oilCbe scavengedDbe atomized with fuel oil

5、Right at the top is（）It is 300 mm long

Right at the top is（）It is 300 mm long and 25 mm wide with its upper edgs in line with the uppermost continuous watertight deck.Athe deck lineBPlimsoll discCPlimsoll lineDsunmmer load line

6、It is very important that each cylinde

It is very important that each cylinder should be （） scavenged before the charged air is compressed.AwellBgoodCexcellentDrespectively