It is possible，and sometimes necessary，to strengthen the deck of a vessel for carriage of deck cargo by（）.
1、It is necessary to secure the forced v
It is necessary to secure the forced ventilation to a compartment where there is a fire to（）.Aallow the exhaust fans to remove smokeBextingui...
2、It is necessary for us （） after having
It is necessary for us （） after having served for a certain period.Ato change the lube oilBhave the lube oil purifiedChave the lube oil burntDto analyze the lube oil
3、When it is necessary to open a refrige
When it is necessary to open a refrigeration system for repairs and the system will be open for more than a few minutes, the open ends of the system should be （）.AdehydratedBpurgedCpluggedDevacuated
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、When it is necessary to remove a victi
When it is necessary to remove a victim from a life threatening situation，the person giving first aid must ().APull the victim by the feetBAv...
6、What is it called when it is possible
What is it called when it is possible to ignite the vapour above the oil?（）AFlash pointBBoiling pointCIgnition pointDPour point