组合电器套管局部放电试验中,符合产品技术条件要求,无要求时按下述要求进行:1.5Um/√3电压下,局部放电量应不大于()pC。
A.5
B.10
C.15
D.20
参考答案:B
You are in charge of a power-driven vessel navigating at night.You sight the red sidelight of another vessel on your port bow.The other vessel’s aft masthead light is to the right of her forward masthead light. You should().
A.stop engines
B.hold course and speed
C.alter course to port
D.sound the danger signal
预先核准的企业名称有效期限是多长时间?有效期满可以办理延期么?