单选题Portable CO2 fire extinguishers should NOT be used to inert a space containing flammable liquids due to the danger of（）.A the CO2 being inhaled by personnelB reflash of burning liquidsC vapor condensation on the extinguisherD the discharge causing a st

The required number and type of hand portable fire extinguishers for staterooms on cargo vessels is ______.

A.one A-I

B.one B-I

C.one C-I

D.none required

You are planning to use the crude oil washing system on your tanker．What is required to prevent electrostatic buildup in the tanks ________．

A.The portable machines should be set at the proper drop for the first wash before the fixed machines are used

B.The tank used as the source for the tank cleaning machines should be debottomed for at least one meter

C.The inert gas system must reduce the oxygen content in the tank to at least 18%

D.The fixed machines must be operated simultaneously with the portable machines to equalize the electrostatic potential

Portable carbon dioxide fire extinguishers should be sent ashore to be recharged

A.when the remaining charge volume is less than 90 percent of the required volume

B.at each inspection for certification

C.at each annual inspection

D.when the weight loss exceeds 10% of weight of charge

Each hand portable fire extinguisher on M/V Utopia must be marked with______．

A.the date that it was installed on the unit

B.the names of the individuals qualified to use it

C.the name of the unit on which it is located

D.an identification number different from other extinguishers on the unit

To determine the number of portable fire extinguishers required on an inspected vessel，you should check the ______.

A.hot work permit

B.Certificate of Inspection

C.Safety of Life at Sea Certificate

D.station bill

All portable fire extinguishers must be capable of being ______.

A.carried by hand to a fire

B.carried or rolled to a fire

C.recharged in the field

D.used on class “B” fire

In the event of fire in a machinery space，______.

A.the fixed carbon dioxide system should be used only when all other means of extinguishment have failed

B.the fixed carbon dioxide system should be used immediately，as it is the most efficient means of extinguishment

C.water in any form should not be used as it will spread the fire

D.the space should be opened 5 minutes after flooding CO2 to prevent injury to personnel

Foam-type portable fire extinguishers are most useful in combating fires involving ______.

A.solid materials such as wood or bales of fiber

B.inflammable liquids

C.electrical equipment

D.metallic solids