单项选择题
The highest pressure in any closed diesel engine freshwater cooling system is at the （）.
A.jacket water outlet B.expansion tank inlet C.heat exchanger inlet D.cooling water pump outlet
单项选择题 The lube oil cooler is located after the lube oil filter in order for （）
单项选择题 In a large, slow-speed, main propulsion diesel engine, which of the parts listed is under tension when the engine is running?（）
单项选择题 The color of the exhaust from a diesel engine should be （）
