电网题（Power grid problem）.doc

电网题（Power grid problem） 1, residual current protection device, current leakage action should not be greater than (mA). A, 10 B, 20 C, 30 D, 40 2, when the low voltage power grid is under grade protection, the delay protection type residual current action protector shall be selected for the higher level protection. The breaking time should be increased by more than the action time of the lower protector. A:0.1s B:0.2s C:0.3s D:0.4s 3, the equipment has general defects, but does not affect the safe operation, basic information is basically complete, known as () equipment A: General B: class C: class two D: Three 4, the lines and equipment have obvious damage, deformation, may affect the line equipment and personal safety during the period is called () defects. A: significant B: class C: General D: three categories 5, equipment overhaul has two systems, namely (). A: periodic maintenance, planned maintenance, B: troubleshooting, condition based maintenance C: planned maintenance, troubleshooting, D: planned maintenance, status overhaul 6, the equipment comprehensive inspection, maintenance, elimination and improvement, such as comprehensive work, the purpose is to restore the design performance of equipment, known as equipment (). A: B: C: repair and overhaul accident repair D: the state overhaul 7. The administrative regulations on safety in production are formulated and approved by the organization. A: State Administration of work safety B: NPC Standing Committee C: State Council D: local peoples Government 8, the legislative purpose of the production safety law is: in order to strengthen the safety production supervision and management, () production safety accidents, protect peoples lives and property, and promote economic development. A: control B: prevent and reduce C: prevention and reduction 9, the scope of effectiveness of the law on the safety of production is the territory of Peoples Republic of China, including (). A: our territory, territorial airspace and