单项选择题
Fire extinguishers of sizes III，IV，and V are designated as（）.
A.portable
B.semi-portable
C.fixed
D.disposable
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相关考题
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单项选择题
Fire and abandon ship stations and duties may be found on the（）.
A.crewman's duty list
B.Certificate of Inspection
C.shipping articles
D.muster list -
单项选择题
Fire alarm system thermostats are actuated by（）.
A.smoke sensors
B.the difference in thermal expansion of two dissimilar metals
C.pressure loss due to air being heated
D.an electric eye which actuates when smoke interferes with the beam -
单项选择题
Except in rare cases，it is impossible to extinguish a shipboard fire by（）.
A.removing the heat
B.removing the oxygen
C.removing the fuel
D.interrupting the chain reaction
