A.an electrical interlock system
B.an automatic paralleling trip switch
C.the synchronizing oscilloscope
D.the reverse current relay
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A.waterproof
B.drip proof
C.spray tight
D.spray proof
A.portable tools
B.large pump motors
C.turbo electric main motors
D.forced draft fans
A.5 volts, the output changes 10 volts
B.10 volts, the output changes 5 volts
C.2 volts, the output changes 10 volts
D.10 volts, the output changes 2 volts
A.penetration of moisture
B.accumulation of dirt
C.overheating
D.All of the above
A.90~0 kw
B.127~27 kw
C.155~70 kw
D.194~85 kw
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