In this factory each worker must recei

1、How must each storage tank for helicop

How must each storage tank for helicopter fuel on a ship be marked?（）ADANGER - KEEP AWAYBDANGER - EXPLOSIVE VAPORSCDANGER - NO SMOKINGDDANGER - FLAMMABLE LIQUID

2、Each fire hose coupling on a ship must

Each fire hose coupling on a ship must have threads that meet the specifications of the（）.AAmerican Petroleum InstituteBNational Standard Firehose CouplingCAmerican Society of Mechanical EngineersDUnderwriter's Laboratories，Inc

3、You must（）in this area unless you have

You must（）in this area unless you have messages about the casualty.Akeep radio silenceBkeep radio silentCkeep radio be silentDkeep silent the radio

4、Each fire hydrant must have at least o

Each fire hydrant must have at least one spanner and at least one（）.Ahose rack or reelBall purpose nozzleCfoam applicatorDpick axe

5、Each inert gas system gas main must ha

Each inert gas system gas main must have an automatic shut down valve at the outlet of the gas production plant. This valve must close automatically upon（）.Acargo pump failureBblower failureCdeck seal low water levelDlow inert gas temperature

6、Vessels must navigate（）caution in this

Vessels must navigate（）caution in this area.AinBbyConDwith