A.low voltage battery
B.motor attenuator set
C.DC exciter generator
D.AC supply
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A.replace all bearings regardless of length of service
B.apply a heavy coat of oil to all mating surfaces
C.clean any corroded surfaces and file all burrs smooth
D.coat all parts with alemite grease
A.Peak value
B.Root-mean-square value
C.Average value
D.Maximum value
A.time-delay protection
B.short-circuit protection
C.short duration surge protection
D.sustained overload protection
A.a magnetic operating coil
B.normally open line contacts
C.thermal-overload protection
D.a momentary-contact start button
A.60
B.120
C.180
D.360
最新試題
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Under MARPOL Code the ship to which it applies has to carry （）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）
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One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）
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