单选

If you were inspecting the valve springs on an auxiliary diesel engine, your best indication of impending spring failure would be ________.

A.a glazed surface on the spring
B.nicks in the protective coating
C.a build up of sludge deposits
D.cracks in the surface of the spring

试题出自试卷《海船船员考试轮机部三管轮模拟题9(轮机英语)》

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