单项选择题
A.pilot valve oil pressure
B.speeder spring force
C.compensation needle valve clearance
D.centrifugal force on the flyweights
单项选择题 In order to start a large, low-speed, main propulsion diesel engine on high viscosity fuel after an extended shutdown, the （）
单项选择题 Excessive diesel engine back pressure may be an indication of （）
单项选择题 A possible cause for an individual piston to knock when at TDC on a slow-speed, two-stroke/cycle main propulsion diesel engine could be due to （）