【名词&注释】
正确答案:C。A.paint and insulate the plates to prevent corrosion B.renew the plates at each inspection C.replace the zincs if deteriorated by 50% D.file the plates to change the negative value 更多海船船员的考试资料下载及答案解析请访问不凡考网职业技能鉴定考试频道。
[单选题]When checking zinc plates in the refrigerating system condenser, you should
A. paint and insulate the plates to prevent corrosion
B. renew the plates at each inspection
C. replace the zincs if deteriorated by 50%
D. file the plates to change the negative value
