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
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A.removing the heat
B.removing the oxygen
C.removing the fuel
D.interrupting the chain reaction
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
A.NOT contain more than 200 pounds of CO2
B.be automatically operated by a heat actuator
C.have an audible alarm
D.All of the above
A.the discharge valve is open
B.the control box glass is broken
C.pressure from the control cylinders is detected
D.the control cylinders have been completely discharged
A.machinery spaces
B.cargo compartments
C.living quarters
D.galley
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Fire in an engine compartment is best extinguished with carbon dioxide gas (CO2) and by（）.
Flame screens are used to（）.
Fire extinguishers on inspected vessels are numbered by size I through V，with I being（）.
Fire extinguishers of sizes III，IV，and V are designated as（）.
How does foam extinguish an oil fire?（）.
Foam extinguishes a fire by（）.
CO2 cylinders equipped with pressure actuated discharge heads will discharge automatically when（）.
Halon extinguishes a fire by（）.
Foam-type portable fire extinguishers are most useful in combating fires involving（）.
Except in rare cases，it is impossible to extinguish a shipboard fire by（）.