单选题When flammable liquids are handled in a compartment on a vessel，the ventilation for that area should be（）.A operated continuously while vapors may be presentB operated intermittently to remove vaporsC available on standby for immediate useD shut down i

For safety reasons，when assistance towing ______．

A.the disabled vessel should be towed to the nearest port

B.the disabled vessel should be inspected for flammable gases

C.passengers should always be removed from the disabled vessel

D.personnel on the disabled vessel should don PFD's

Butadiene，inhibited，is labeled as a ______．

A.Combustible liquid

B.Flammable gas

C.Flammable liquid

D.Flammable solid

A. Transit traffic is handled by the RE only

B. Transit traffic is handled by the PFE only

C. Transit traffic is handled by both the RE and the PFE

D. Transit traffic is not handled by the RE or the PFE

Which statement concerning the application of dry chemical powder is FALSE ________．

A.At temperatures of less than 32℉，the extinguisher must be recharged more often

B.When possible，the fire should be attacked from windward

C.The stream should be directed at the base of the fire

D.Directing the stream into burning flammable liquid may cause splashing

You are testing a tank that contained gasoline by using a combustible gas indicator．Under testing，the tank sample caused the needle to move rapidly to 100 on the dial then fall to zero．What is the concentration of flammable gas ________．

A.Less than the flammable range

B.Within the flammable range

C.Over the flammable range

D.The explosimeter is defective and giving a false reading

When flammable liquids are handled in a compartment on a vessel，the ventilation for that area should be ______．

A.operated continuously while vapors may be present

B.operated intermittently to remove vapors

C.available on standby for immediate use

D.shut down if an explosive mixture is present

When started, a complete oily water separating unit is first filled ______. The oily water mixture is then pumped through the inlet pipe into the coarse separating compartment.

A.with dirty water

B.with clean water

C.by oily water

D.by mixed water

Argon is classified as a ______.

A.corrosive

B.flammable gas

C.flammable liquid

D.nonflammable gas