单项选择题

What is the function of an air receiver in the compressed air system on a ship? （）

A.Condenses moisture
B.Provides overpressure protection
C.Purifies the air
D.Acts as an accumulator

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单项选择题

A.Stem
B.Pin
C.Box
D.Stand

单项选择题

A.An oxygen indicator
B.A combustible gas indicator
C.A combination combustible gas and oxygen indicator
D.A flame safety lamp

单项选择题

A.Carbon dioxide
B.Distilled water
C.Fresh water
D.Salt water