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单项选择题
A.micro-seizure
B.scratch
C.break
D.stick
单项选择题
A.Lack of elastic tension, when the rings are pressed into the groove by means of a stick
B.Blackish appearance
C.Fractured rings and missing rings
D.all off the above
单项选择题
A.micro-seizure
B.sticking
C.scratched
D.breakage/ollapse
单项选择题
A.micro-seizure
B.sticking
C.scratched
D.breakage/collapse
单项选择题
A.hazy light
B.hazy light brown
C.hazy light blue
D.hazy light grey
单项选择题
A.upwards;inwards
B.upwards;outwards
C.downwards;inwards
D.downwards;outwards
单项选择题
A.at the first stop after a long voyage egby anchoring if possible
B.at the first stop after arrival at harbor
C.at the first stop after low load running
D.at the first stop after passing river or canal passage
单项选择题
A.disengaged
B.engaged
C.assembled
D.disassembled
单项选择题
A.supply clean air to the measuring compartment of the units for more accuracy
B.generaate the pressure required for the extraction of the oil mist from the
C.generate the pressure required for the extraction of the oil mist from the crankcase
D.supply clean air to the measuring track of the units for more accuracy
单项选择题
A.avoid false alarms as a result of condensing water vapor
B.avoid danger of frost under very cold weather
C.reduce the viscosity of the crankcase atmosphere in order to improve the fluidity
D.keep the temperature of the oil mist detectors in an appropriate range