单项选择题
A.be turned by a turning gear for at least one minute B.be turned by a turning gear for at least two minutes C.be turned at least one complete turn D.be turned at least two complete turns
The oil pressure and flow from each bearings can be che...
单项选择题The oil pressure and flow from each bearings can be checked when（）
A.the lubricating pumps are stopped and the access doors are opened B.the lubricating pumps are running and the access doors are opened C.the engine is running and the access doors are closed D.the engine is stopped and the access doors are closed
When preparing an engine for water temperature（）A.shoul...
单项选择题When preparing an engine for water temperature（）
A.should be kept at a proper level by a cooler B.should be raised to about 80℃ by a heater C.should be raised gradually D.should be lowered to about 60℃
When stand-by engine instructions have been received, i...
单项选择题When stand-by engine instructions have been received, it’s necessary to make it sure that all valves in the various systems are（）
A.operational B.open C.closed securely D.at middle position
