消弧线圈采用欠补偿运行时,当网络发生故障或因其它原因使某些线路断开后,可能()。
A. 构成串联谐振,产生过电压
B. 使中性点位移,电压达最高值
C. 影响消弧效果
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After Venus passes the point of greatest elongation east in its orbit,the first position in which the elongation will be zero is().
A. superior conjunction
B. inferior conjunction
C. opposition
D. None of the above; the elongation will never be zero
Which of the following problems can cause an above normal air temperature to develop in the intake manifold of a turbocharged and after-cooled diesel engine?()
A. Faulty turbocharger turbine diffuser ring
B. Faulty turbocharger compressor ring
C. Insufficient cooling water flow
D. Clogged air intake filter