A.increase the field excitation
B.decrease the field excitation
C.increase the number of magnetic poles
D.increase the speed of the prime mover
您可能感興趣的試卷
你可能感興趣的試題
A.in series with the power source and load
B.in parallel with the power source and load
C.insuring correct polarity
D.using the lowest range possible to prevent instrument damage
A.main alternator field rheostat
B.exciter field rheostat
C.prime mover governor control
D.equalizing reactor
A.resistance will decrease
B.insulation will bum
C.temperature will increase
D.conductivity will increase
A.open the generator circuit breaker
B.switch the voltage regulator to “manual”
C.decrease the field excitation to minimum
D.reduce the load on the unit
A.manual position
B.bus neutral position
C.raise voltage position
D.transfer position
最新試題
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
Flame failure in an automatically fired auxiliary boiler can from a/an （）
（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
The cetane rating of diesel fuel is an indication of the （）
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
Diesel engine air start system check valves are opened by （）
The main purpose of port State control is not to（）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
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（）