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After using a CO2 portable extinguisher, it should be ______.
A.put back in service if some CO2 remains
B.hydrostatically tested
C.retagged
D.Recharged
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单选题How do you operate a portable CO2 fire extinguisher?（）A
Point the horn downB
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单选题If you are unable to stop a diesel engine by any other means，you should（）.A
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单选题Which portable fire extinguisher should be used on a class C fire on board a vessel?（）A
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单选题After using a C02 portable extinguisher，it should be（）.A
put back in service if some C02 remainsB
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单选题A portable dry chemical fire extinguisher discharges by（）.A
gravity when the extinguisher is turned upside downB
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pressure from the reaction when water is mixed with the chemical
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单选题When fighting a fire on a bulkhead using a portable carbon dioxide extinguisher，the stream should be directed at the（）.A
base of the flames，moving the horn from side to side，following the flames upward as they diminishB
top of the flaming area，moving the horn from side to side，following the flames downward as they diminishC
center of the flaming area，moving the horn vertically from top to bottomD
bottom of the flaming area，moving the horn vertically to the top following the flames upward as they diminish
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单选题Which types of portable extinguisher should you watch for the reflash of the fire?（）A
foam and waterB
CO2 and dry chemicalC
dry chemical and waterD
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单选题If a small fire initially breaks out in the engine room bilges, in which of the following sequences should the fire extinguishing agents or systems be used?（）A
Fixed CO2,semi-portable CO2, then hand portable CO2B
Semi-portable CO2, fixedCO2, then hand portable CO2C
Hand portable, semi-portable CO2, then as a last resort the fixed CO2 systemD
Hand portable, fixed CO2, then as a last resort the semi-portable CO2
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单选题After using a Halon extinguisher，it should be（）.A
put back in service if more than 50% of the charge remainsB
repaintedC
discardedD
recharged
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单选题Which is the proper method of determining whether a portable CO2 fire extinguisher needs recharging?（）A
Check the tag to see when the extinguisher was last chargedB
Release a small amount of CO2; if the CO2 discharges，the extinguisher is acceptableC
Weigh the extinguisher and compare the weight against that stamped on the valveD
Recharge the extinguisher at least once each year
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单选题A CO2 portable extinguisher is annually checked by（）.A
reading the gage pressureB
weighing the extinguisherC
discharging a small amount of CO2D
seeing if the seal has been broken
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单选题When fighting a fire with a portable dry chemical fire extinguisher，the stream should be directed（）.A
over the top of the flamesB
off a bulkhead into the fireC
in front of the fireD
at the base of the fire
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填空题What is meant if you go on using the service after changes in the agreement are posted?It means you have ____ the modification.
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