Whenthecurrentinapowertransmissionlineisincreased,thepowerloss()
A. increasesasthesquareofthecurrent
B. decreasesasthesquarerootofthecurrent
C. remainsthesame,asitisindependentofcurrentflow
D. increasesindirectproportionasthecurrent
Whichofthelistedsectionsofanemergencyswitchboardisusedtosupplypowerforalarmsignalsunderemergencyconditions?()
A. Thegeneratorandbustransfersection
B. The450volt,60cycle,3phasebus
C. The120volt,3phase,60cyclebus
D. The24voltDCbus
小车额定运行速度是在规定作业工况下,满载时()运行时的最高线速度.
A. 顺风
B. 无风
C. 逆风
In()convention,avesselwhichcarriesmorethan12passengersshallbedeemedasapassengership.
A. COSCO
B. STCW
C. SOLAS
D. MARPOL