If a CO2 fire extinguisher is not readily available, which of the listed fire extinguishers would be best suited to combat a small electrical fire in a switchboard?（）

相似题目

• 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

  查看最佳答案

• After extinguishing a paint locker fire using the fixed CO2 system，the next action is to have the space（）.

  A . opened and burned material removed B . left closed with vents off until all boundaries are cool C . checked for oxygen content D . doused with water to prevent reflash

  查看最佳答案

• To determine if a C02 fire extinguisher is fully charged, you would（）.

  A . operate the trigger valve B . weigh the extinguisher C . test with a pressure gauge D . read the date of last test

  查看最佳答案

• On a bulk chemical carrier，water should NOT be used as an extinguishing agent to fight a fire if the water may come into contact with the chemical called（）.

  A . acrylic acid B . benzene C . oleum D . vinyl toluene

  查看最佳答案

• 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

  查看最佳答案

• Removing which will extinguish a fire?（）.

  A . Nitrogen B . Carbon dioxide C . Sodium D . Oxyge

  查看最佳答案

• In order to release CO2 to the machinery spaces from a fixed fire extinguishing system, you must（）.

  A . actuate an alarm and open the engine room control valve B . actuate an alarm and open the engine room CO releasing valve C . open the engine room control valve and shut off engine room ventilation fans D . open the engine room control valve and then the CO releasing valve

  查看最佳答案

• After extinguishing a fire with CO2，it is advisable to（）.

  A . use all CO available to cool the surrounding area B . stand by with water or other agents C . thoroughly ventilate the space of CO D . jettison all burning material

  查看最佳答案

• 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

  查看最佳答案

• 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

  查看最佳答案

• Halon extinguishes a fire by（）.

  A . breaking the chain reaction B . smothering the fire C . cooling the fire D . coating the fuel with a nonflammable surface

  查看最佳答案

• Foam extinguishes a fire by（）.

  A . shutting off the air supply B . cooling the fuel to below ignition temperature C . dispersing the fuel D . removing the source of ignitio

  查看最佳答案

• A large oil fire is best extinguished with（）

  A . soda acid B . foam C . CO D . sand

  查看最佳答案

• The fire extinguishing action of CO2 comes mostly from （）.

  A . breaking the fire chemical chain reaction B . smothering C . cooling D . isolating the heat from the fuel

  查看最佳答案

• A crew member reports that the high-pressure alarm light of a low-pressure CO2 fixed fire extinguishing system is illuminated. The most probable cause of this condition would be that（）.

  A . an air leak has developed in the tank B . the tank cooling system has malfunctioned C . the pilot cylinder discharge valve is leaking D . an excessive amount of insulation has been installed on the tank and piping

  查看最佳答案

• A fire can be extinguished by removing （）.

  A . the heat B . the fuel C . the oxygen D . any of the above

  查看最佳答案

• C02 extinguishes a fire by（）.

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

  查看最佳答案

• Which of the fire extinguishers listed is to be weighed annually and sent ashore for recharging if the weight loss exceeds 10% of the weight of a full charge?（）

  A . Foam B . Soda acid C . Dry chemical D . Carbon dioxide

  查看最佳答案

• To determine if a CO2 fire extinguisher is fully charged，you would（）.

  A . Operate the trigger valve B . Weigh the extinguisher C . Test with a pressure gauge D . Read the date of last test

  查看最佳答案

• Foam extinguishes a fire mainly by（）.

  A . cooling B . chemical action C . smothering D . inerting the air

  查看最佳答案

• 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

  查看最佳答案

• Fire in an engine compartment is best extinguished with carbon dioxide gas (CO2) and by（）.

  A . completely closing the compartment B . closing the compartment except for the ventilators C . leaving the compartment open to the air D . increasing the air flow to the compartment by blower

  查看最佳答案

• CO2 extinguishes a fire by（）.

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

  查看最佳答案