A、A.After each use
B、B.When the air temperature exceeds 90°F
C、C.Every 6 months
D、D.Every 12 months
更多“When must a dry chemical fire extinguisher be recharged?（）”相关的问题
A、Wet cargo must be kept away from dry cargo. B、Heavy cargo must be kept away from dry cargo. C、Light cargo must be kept away from dry cargo. D、Wet cargo must be kept away from light cargo.
A、A.Twice the dry bulb temperature B、B.10℃ above the dry bulb temperature C、C.5℃ above the dry bulb temperature D、D.Equal to the dry bulb temperature
A、A. When the derrick is stopped, the guy must be stowed. B、B. When the derrick is stopped, the guy must be topped. C、C. When the derrick is stopped, the guy must be lowered. D、D. When the guy is stopped, the derrick must be stowed.
A、12 months since last dry-docking B、18 months since last dry-docking C、24 months since last dry-docking D、36 months since last dry-docking
A、When the windlass is in trouble, the sailor must go and call the electrician to repair it. B、When the derrick is in trouble, the sailor must go and call the electrician to repair it. C、When the winch is in trouble, the sailor must go and call the electrician to repair it. D、When the winch is in trouble, the sailor must go and call the carpenter to repair it.
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