A CO2 portable extinguisher is annually checked by（）.

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• How do you operate a portable CO2 fire extinguisher?（）.

  A . Point the horn down B . Turn cylinder upside-down C . Break the rupture disc D . Pull pin，squeeze gri

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• CO2 extinguishes a fire by （）.

  A . a blanket of bubbles formed on the surface of the fire B . smothering C . cooling D . isolating the heat from the fuel

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• In order to discharge a C02 portable fire extinguisher , the operator must first（）.

  A . invert the CO extinguisher B . squeeze the two trigger handles together C . remove the locking pin D . open the discharge valve

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• Portable CO2 fire extinguishers should NOT be used to inert a space containing flammable liquids due to the danger of（）.

  A . the CO being inhaled by personnel B . reflash of burning liquids C . vapor condensation on the extinguisher D . the discharge causing a static spark

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• A portable foam (stored-pressure type) fire extinguisher would be most useful in combating a fire in（）.

  A . generators B . oil drums C . the bridge controls D . combustible metal

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• 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 charged B . Release a small amount of CO ; if the CO discharges，the extinguisher is acceptable C . Weigh the extinguisher and compare the weight against that stamped on the valve D . Recharge the extinguisher at least once each year

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• Which action is routinely performed at the annual servicing and inspection of a dry-chemical cartridge-operated portable fire extinguisher?（）

  A . Test the pressure gauge for correct reading B . Weigh the cartridge C . Replace the dry chemical D . Pressure test the discharge hose

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• After using a C02 portable extinguisher,it should be（）.

  A . put back in service if some CO remains B . hydrostatically tested C . retagged D . recharged

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• Each hand portable，semi-portable and fixed fire extinguishing unit on a ship must be tested and inspected at least once every（）.

  A . six weeks B . six months C . twelve months D . two year

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• Which portable fire extinguisher is normally recharged in a shore facility?（）

  A . Dry chemical (cartridge-operated) B . Water (cartridge-operated) C . Water (pump tank) D . Carbon dioxide

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• Each hand portable fire extinguisher on a ship must be marked with（）.

  A . the name of the unit on which it is located B . the date that it was installed on the unit C . the names of the individuals qualified to use it D . an identification number different from other extinguishers on the unit

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• A portable foam fire extinguisher is placed in operation by（）

  A . turning it upside down B . pressing the foam lever C . squeezing the grip handle D . opening the hose valve

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• A foam-type portable fire extinguisher would be most useful in combating a fire in（）.

  A . soild materials such as wood or bales of fiber B . flammable liquids C . a piece of electrical equipment D . combustible metallic solid

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• How do you operate a portable C02 fire extinguisher?（）.

  A . Point the horn down B . Turn cylinder upside-down C . Break the rupture disc D . Pull pin, squeeze gri

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• A C02 portable extinguisher is annually checked by（）.

  A . reading the gage pressure B . weighing the extinguisher C . discharging a small amount of CO D . seeing if the seal has been broke

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• After using a C02 portable extinguisher，it should be（）.

  A . put back in service if some C0 remains B . hydrostatically tested C . retagged D . recharged

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• A foam-type portable fire extinguisher is most useful in fighting a fire in（）.

  A . generators B . oil drums C . the bridge controls D . combustible metal

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• A fifteen-pound CO2 extinguisher（）.

  A . contains 15 pounds of CO B . weighs 15 pounds when full of CO C . has 15 pounds of pressure at the nozzle D . weighs 15 pounds when empty

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• CO2 extinguishes a fire by（）.

  A . cooling B . smothering C . chemical action D . All of the above

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• Which portable fire extinguisher should be used on a class C fire on board a vessel?（）

  A . Carbon dioxide B . Water (stored pressure) C . Foam D . Carbon tetrachloride

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• A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged.It should be ______.

  A.replaced in its proper location if weight loss is no more than 15% B.replaced in its proper location if weight loss is no more than 25% C.labeled empty and recharged as soon as possible D.labeled empty and replaced in its proper location regardless of weight

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