Dirt should not be allowed to contaminate a grease lubricant because the （）.<br>A:dirt will cause corrosion of bearing<br>B:bearings will leak oil excessively<br>C:dirt is very abrasive when mixed with grease<br>D:grease will become inflammable

Dirt should not be allowed to contaminate a grease lubricant because the （）.
A:dirt will cause corrosion of bearing
B:bearings will leak oil excessively
C:dirt is very abrasive when mixed with grease
D:grease will become inflammable

出自：海船船员证

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