Which action is routinely performed at the annual servicing and inspection of a dry-chemical cartridge-operated portable fire extinguisher?（）<br>A:Test the pressure gauge for correct reading<br>B:Weigh the cartridge<br>C:Replace the dry chemical<br>D:Pressure test the discharge hose

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

出自：海船船员证

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