A、low water level
B、low oil pressure
C、excessively high fuel pressure
D、an improper air/fuel ratio
更多“Black smoke coming from a boiler can be caused by （）.”相关的问题
A、low water level B、high water level C、excessively high fuel pressure D、low oil temperature
A、low water level B、low oil pressure C、excessively high fuel pressure D、an improper air/fuel ratio
A、an insufficient speed droop setting B、an overloaded engine C、clogged drain holes in the oil control rings D、complete combustion
A、decreased fuel efficiency B、increased exhaust temperature C、black smoke D、overspeed trip
A、A.proper fuel injection B、B.water in the fuel C、C.incomplete combustion D、D.burning of lube oil
A、engine overload B、low combustion temperature C、plugged fuel nozzle holes D、excessive compression pressure
A、turbo-chargers surge B、spark seen from the drains C、paint blistering D、all above are right
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