A fire hose with a nozzle attached must be connected to each hydrant except when exposed to heavy weather or when the（）.
1、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
2、To remedy a leaking fire hose connecti
To remedy a leaking fire hose connection at the hydrant，secure the valve and（）.Areplace the gasket in the male couplingBreduce fire pump pressureCreplace the gasket in the female couplingDrethread the male coupling
3、After extinguishing a fire with CO2，it
After extinguishing a fire with CO2，it is advisable to（）.Ause all CO2 available to cool the surrounding areaBstand by with water or other agentsCthoroughly ventilate the space of CO2Djettison all burning material
4、When fighting a fire with a portable d
When fighting a fire with a portable dry chemical fire extinguisher，the stream should be directed（）.Aover the top of the flamesBoff a bulkhead into the fireCin front of the fireDat the base of the fire
5、A cargo hose is marked with the（）.
A cargo hose is marked with the（）.Amaximum working pressureBbursting pressureCsafety relief valve settingDmaximum temperature
Fire hose couplings（）.Aare made of bronze，brass，or soft alloy metalsBshould be painted red in order to identify hose lengthsCare specially hardened to prevent crushingDshould be greased frequently