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【单选题】
In the process of generator paralleling, when the phase of generator voltage and system voltage is inconsistent, impulse current will be generated. The maximum value of impulse current occurs when the difference between the two voltages is ().
A.
0°
B.
90°
C.
180°
D.
100°
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Where did the loanword “Shangrila” initially occur?
A.
In Diqing Titetan Autonomous Prefecture
B.
In Shangrila County
C.
in the novel The Lost Horizon
D.
None of them
【单选题】When the synchronous generator is connected in parallel with the power grid, some conditions must be met, but the first condition that must be absolutely met is ()
A.
Equal voltage
B.
Same phase sequence
C.
Same frequency
D.
Same phase
【单选题】If the synchronous generator is connected to the power grid according to the ideal quasi synchronous method without any adjustment, the output power of the synchronous generator to the power grid is (...
A.
P>0,Q>0
B.
P>0,Q<0
C.
P<0,Q>0
D.
P=0;Q=0
【单选题】In December 2001, Zhongdian County was officially renamed ______ with the permission of the State Council.
A.
Deqing County
B.
Shangrila County
C.
Weixi County
D.
Shangrila Town
【单选题】“Three Parallel Rivers” was identified as a ______ by UNESCO in 2003.
A.
World Cultural Heritage
B.
World Record Heritage
C.
World Fossil Heritage
D.
World Natural Heritage
【单选题】The reactance that mainly affects the maximum electromagnetic torque of synchronous generator is ()
A.
The stator leakage reactance
B.
Synchronous reactance
C.
Reactance of armature reaction
