A.used for electrical fires onlyB.the smallestC.the mos……

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

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

单项选择题Control valves of a CO2 system may be located within the protected space when（）.

A.it is impractical to locate them outside
B.there is also a control valve outside
C.the CO₂ cylinders are also in the space
D.an automatic heat-sensing trip is installed