单项选择题
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
单项选择题 A sudden power loss from a turbocharged and after-cooled diesel engine is an indication of a/an（）
单项选择题 If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase（）
单项选择题 The desirable properties of a marine fuel oil should include（）
