Regarding a Diesel engine crankcase, the general arrangement and installation should preclude the possibility of （）<br>A:free entry of air to the crankcase<br>B:water entering the crankcase while engine wash-downs are being performed<br>C:excessive oil leakage during periods of increased blow-by<br>D:sub-cooling internal components

Regarding a Diesel engine crankcase, the general arrangement and installation should preclude the possibility of （）
A:free entry of air to the crankcase
B:water entering the crankcase while engine wash-downs are being performed
C:excessive oil leakage during periods of increased blow-by
D:sub-cooling internal components

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