A、A.burned exhaust valves
B、B.excessive spring compression
C、C.spring surge
D、D.worn valve seats
更多“Excessively worn, or polished ends on a diesel engine valve spring, indicate（）”相关的问题
A、pump would be very noisy B、pump would vibrate excessively C、pump would develop insufficient flow D、stuffing box would leak excessively
A、insufficient fuel supply due to fuel pump valves sticking or leaking B、excessive mechanical clearance between the piston crown and cylinder head C、excessively worn fuel pump plunger D、excessive exhaust back pressure
A、worn or broken cylinder liner sealing rings B、high cooling water temperature C、worn or broken piston rings D、low fuel oil pressure
A、The wearing rings are excessively worn B、The suction strainer is clogged C、The discharge valve is clogged D、The shaft is worn
A、pump bearings in poor condition B、excessively worn actuator-piston packing C、broken directional control valve centering springs D、low hydraulic oil viscosity
A、air filtration is inadequate B、engine coolant leaking into the lube oil C、fuel oil is leaking into the lube oil D、the piston rings are excessively worn
A、fouled tubes in shell and tube condenser B、too little or too warm condenser water C、air or non-condensable gas in system D、overcharge of refrigerant
A、early injection timing B、worn orifices in the injection nozzles C、worn or scored cylinder liners D、using a fuel with too low of a cetane number
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