1、PEC 电气工程英语认证证书考试真题（50-60）50 _ causes reduction in insulation resistance and dielectric failure.A Gold migrationB Silver migrationC Copper migration 答案： b答案要点： 51 _ is a measure of how easily a circuit or device will allow a current to flow.A PickupB AdmittanceC Synchro 答案： b答案要点： 52 _ refers to a se
2、t of branches which form a closed path in a network. If any of branch is omitted from the set, the rest of the branches of the set do not form a closed path.A DebyeB MeshC Parallel 答案： b答案要点： 53 Power transmission towers are used in _alternating current and direct current systems, and come in a wide variety of shapes and sizes.A high-voltage姓名 单位 准考证号 分数 密封线 B medium-voltageC low-voltage 答案： a答案要点： 54 _ is an imaginary resistor in series with the capacitor itself.A Film resistorB Effective series resistanceC Electromagnetic resistance
