invert the CO extinguisher
squeeze the two trigger handles together
remove the locking pin
open the discharge valve
第1题：
A foam-type portable fire extinguisher would be most useful in combating a fire in ______.
A.solid materials such as wood or bales of fiber
B.flammable liquids
C.a piece of electrical equipment
D.combustible metallic solid
第2题：
In order to discharge a CO2 portable fire extinguisher, the operator must FIRST ______.
A.invert the CO2 extinguisher
B.squeeze the two trigger handles together
C.remove the locking pin
D.open the discharge valve
第3题：
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
第4题：
at the base of the flames
at the center of the flames
to the lee side of the flames
over the tops of the flames
第5题：
Close all fire doors and use the （）（干粉灭火器）.
第6题：
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 metals
第7题：
Fire in the cabins. Close all fire doors and use the （）powder extinguisher.
第8题：
The most effective way of applying carbon dioxide from a portable extinguisher to a fire is by ______．
A.Forming a cloud cover over the flames
B.Directing the gas at the base of the flames in a slow sweeping motion
C.Discharging the carbon dioxide into the heart of the flames
D.Bouncing the discharge off an adjacent bulkhead just above the burning surface
第9题：
turning it upside down
pressing the foam lever
squeezing the grip handle
opening the hose valve
第10题：
generators
oil drums
the bridge controls
combustible metals