更多"The alternating current generator s"的相关试题:
[单项选择]The frequency of the alternating current generated by a synchronous generator is governed by the speed and the（）
A. full excitation
B. load
C. power factor
D. number of poles
[单项选择]In an alternating current electrical system, a low system power factor is a direct sign of （）
A. wasted energy
B. efficient operation
C. a short in the exciter field windings
D. an excessive number of minor system grounds
[单项选择]The load rating of an AC generator is determined by the（）
A. internal heat it can withstand
B. load it can carry continuously
C. load it is capable of supplying
D. overload it can carry for a specified time only
[单项选择]With a purely （） load the voltage and current are in phase, giving a power factor of one.
A. inductive
B. resistance
C. combined
D. capacitate
[单项选择]A DC generator is used to supply direct current in order to maintain an AC generator field and is known as a/an （）
A. rotor
B. stator
C. exciter
D. armature
[单项选择]With a （） load the voltage and current are in phase.
A. pure resistance
B. capacitive
C. inductive
D. None of the above
[单项选择]An alternating light（）.
A. shows a light with varying lengths of the lighted period
B. shows a light that changes color
C. marks an alternate lesser-used channel
D. is used as a replacement for another light
[名词解释]供水性 water supplying capability
[单项选择]Which is the summer load waterline on the load waterline mark?（）.
A. The first line at the bottom
B. The second line from the bottom
C. The third line from the bottom
D. The fourth line from the bottom
[单项选择]The process of supplying a diesel engine cylinder with air at a pressure greater than atmospheric is called（）.
A. engine displacement
B. super-aspirating
C. air injection
D. supercharging
[单项选择]An emergency diesel generator should automatically shut down in the event of （）
A. dangerous over-speeding
B. a loss of lube oil pressure
C. activation of the fixed CO2 system for the emergency generator space
D. all of the above
[单项选择]（）belongs to emergency power supplying equipments.
A. Navigation lamp
B. Windlass
C. Main sea water pump
D. Compressor
[单项选择]VACUUM GENERATOR的工作条件（）
A. 在地面或空中低于16000英尺
B. 仅在地面
C. 仅在空中低于16000英尺
D. 飞机高度高于16000FT
[单项选择]Generator brushes are staggered to（）
A. reduce current pulsations
B. reduce brush chatter
C. prevent uneven commutator wear
D. allow greater power generation
[单项选择]（）is an opening for supplying seawater to condensers, pumps,etclocated in the hull below the waterline and having means for the attachment of associated piping.
A. SEA CHEST
B. SCUPPER
C. SCUTTLE
D. SEA PORT
[单项选择]Diesel engines are started by supplying （） into the cylinders in the appropriate sequence for the required direction.
A. cooling water
B. compressing air
C. compressed air
D. cylinder oil
