Excessive alkalinity of the water in an auxiliary boiler can cause （）.<br>A:caustic embrittlement of the boiler metal<br>B:acidic corrosion of the boiler metal<br>C:hard scale deposits on the boiler tubes<br>D:etching of the heat exchange surfaces

Excessive alkalinity of the water in an auxiliary boiler can cause （）.
A:caustic embrittlement of the boiler metal
B:acidic corrosion of the boiler metal
C:hard scale deposits on the boiler tubes
D:etching of the heat exchange surfaces

出自：海船船员证

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