A.without switches on it
B.with insulated switches and no exposed terminals
C.without circuit breakers
D.without safety hand nails nor rubber mats
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A.larger than the greatest branch resistance
B.smaller than the lowest branch resistance
C.equal to the sum of the individual branch resistances
D.one-half the sum of the individual branch resistances
A.result in decreased acceleration time only
B.lower the starting current and increase accelerating time
C.cause a greater starting torque
D.increase the starting current and pump capacity
A.adding rubber insulation conductors to the circuit
B.using higher current and lower voltage increasing the
C.number of thermal relays in the circuit
D.using higher voltage and lower current
A.Armature and equalizer
B.Commutator and brushes
C.Rotor and interpoles
D.Field and exciter
A.Voltage
B.Current
C.Resistance
D.Inductance
最新試題
The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.
The condensers located in various stages of a flash evaporator are cooled by（）
Cold weather starting of a diesel engine may be made easier by（）
（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
The main purpose of port State control is not to（）
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Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish