單項選擇題Fire extinguishing agents used on Class C fires must be（）.

A.able to absorb heat
B.water based
C.nonconducting
D.nontoxic


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1.單項選擇題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

2.單項選擇題Fire extinguishers of sizes III，IV，and V are designated as（）.

A.portable
B.semi-portable
C.fixed
D.disposable

3.單項選擇題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

4.單項選擇題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

5.單項選擇題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