Each fire hydrant must have at least o

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、A fire main system must have enough fi

A fire main system must have enough fire hydrants so that each accessible space may be sprayed with（）.Aa low velocity spray applicatorBa water spray or solid streamCat least two spray patterns of waterDat least 25 psi delivered pressure

3、The outlet at a fire hydrant may be po

The outlet at a fire hydrant may be positioned anywhere from horizontal to pointing（）.A45°upwardBvertically upwardCvertically downwardDall of the above

4、Each fire pump on a tanker must have a

Each fire pump on a tanker must have a pressure gauge located at（）.Athe pump dischargeBthe manifold connectionCeach fire station dischargeDthe pump statio

5、At least（）two-way VHF radiotelephone a

At least（）two-way VHF radiotelephone apparatus shall be provided on every cargo ship of 300 tons gross tonnage and upwards but less than 500 tons gross tonnage.AoneBtwoCthreeDfour

6、Each fire pump on a ship must have a p

Each fire pump on a ship must have a pressure gauge located at（）.Athe pump dischargeBthe manifold connectionCeach fire station dischargeDthe pump statio