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
您可能感興趣的試卷
你可能感興趣的試題
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
A.increase in resistance with increased temperature
B.increase in resistance with decreased temperature
C.decrease in resistance with increased temperature
D.increase in conductance with increased temperature
最新試題
Diesel engine air start system check valves are opened by （）
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
The treatment of the fuel oils involves storage, heating, filtering and（）
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
The condensers located in various stages of a flash evaporator are cooled by（）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）