单选题If a crankcase explosion has occurred in a diesel engine, and the crankcase remains intact, which of following precautions should be observed?（）AThe cylinder indicator cocks should be openedBThe sump lube oil scavenge pump should be secured immediatelyCThe explosion relief valves should be manually openedDThe crankcase should remain unopened until the engine has cooled
单选题
If a crankcase explosion has occurred in a diesel engine, and the crankcase remains intact, which of following precautions should be observed?（）
A
The cylinder indicator cocks should be opened
B
The sump lube oil scavenge pump should be secured immediately
C
The explosion relief valves should be manually opened
D
The crankcase should remain unopened until the engine has cooled
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