A.doubled
B.quadrupled
C.unchanged
D.cut in half
您可能感兴趣的试卷
你可能感兴趣的试题
A.voltage regulator
B.reverse power relay
C.reverse current relay
D.governor control switch
A.field excitation of both units is adjusted
B.governors of both units are adjusted
C.phase sequence is altered
D.kilowatt load is evenly divided
A.are less expensive
B.require less maintenance
C.can be started across the line
D.offer a more effective means of controlling speed
A.Alternators
B.Wave guides
C.Exciters
D.Amplidynes
A.quartered
B.unchanged
C.doubled
D.quadrupled
A.both generate alternating voltages
B.both rectify the voltage before delivery
C.are constructed at the same physical size for the same kilowatt rating
D.both supply three-phase power
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
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
最新试题
To proceed to the assistance of a ship in distress is（）
Under MARPOL Code the ship to which it applies has to carry （）
If separating effect is not good, which measure should be taken （）
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）
The shipboard oil pollution emergency plan will be invalid after （）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
The treatment of the fuel oils involves storage, heating, filtering and（）
Which of the following items don’t belong to dock repair works?（）