If an operating auxiliary boiler has a water pH reading of 7, you should （）.<br>A:bottom blow the boiler<br>B:treat the water with caustic soda<br>C:treat the water with chemical scavengers<br>D:reduce the water alkalinity to recommended readings

If an operating auxiliary boiler has a water pH reading of 7, you should （）.
A:bottom blow the boiler
B:treat the water with caustic soda
C:treat the water with chemical scavengers
D:reduce the water alkalinity to recommended readings

出自：海船船员证

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