单选题When choosing extinguishers to fight a Class “B” fire do NOT use（）.A carbon dioxideB dry chemicalC foam (stored-pressure type)D water (cartridge-operated)

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

When inspecting a tank barge to see that it has all the required fire extinguishers and other safety items aboard，which of the following is the best source for determining what is required?

A.The supervisor in charge of the dock to which the barge is tied up

B.Part 38 of the Rules and Regulations for Tank Vessels

C.The Certificate of Inspection of the barge

D.The local fire marshal

When will the fire department come to conduct a fire prevention inspection in our company?

A. Next month. I’ve checked hydrants and fire-extinguishers on each floor

B.Next day. The manager will check hydrants and other equipment in the building.

C.Next week. But hydrants and fire extinguishers on each floor has already been checked

D.The day before yesterday. I had already checked hydrants and fire extinguishers on each floor.

At the earliest indication of fire aboard your vessel, you must FIRST ______.

A.locate the fire

B.determine which type of fire is burning

C.sound the alarm

D.fight the fire

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

The class of fire on which a blanketing effect is essential to extinguish the fire is

A.Class 'A'

B.Class 'B'

C.Class 'C'

D.Class 'D'