单项选择题
Fire hose couplings（）.
A.are made of bronze，brass，or soft alloy metals
B.should be painted red in order to identify hose lengths
C.are specially hardened to prevent crushing
D.should be greased frequently
点击查看答案&解析
相关考题
-
单项选择题
Fire fighting equipment requirements for a particular vessel may be found on the（）.
A.4Certificate of Inspection
B.Certificate of Seaworthiness
C.Classification Certificate
D.Certificate of Registry -
单项选择题
Fire extinguishing agents used on Class C fires must be（）.
A.able to absorb heat
B.water based
C.nonconducting
D.nontoxic -
单项选择题
Fire extinguishers on inspected vessels are numbered by size I through V，with I being（）.
A.used for electrical fires only
B.the smallest
C.the most accessible
D.the most effective
