电缆敷设前应进行哪些检查工作？ 答：(1)支架应齐全、油漆完整。 (2)电缆型号、电压、规格符合设计。 (3)电缆绝缘良好，当对油纸电缆的密封有怀疑时，应进行受潮判断；直埋电缆与小底电缆应经直流耐压试难合格；充油电缆的油样应试验合格。 (4)充油电缆的油压不宜低于1.47MPa。 21、交联热收缩电缆附件有哪些优点？ 答：这是一种新型材料，它与现在其他类型附件比较具有电气性能优越、体积小、质量小、安装简便、材料配套等优点，另外还具有耐气候、抗污秽性、阻燃自熄等能力。 12、对油纸绝缘电力电缆密封有怀疑时，如何用较简单的办法检查电缆绝缘纸是否受潮？ 答：把电缆绝缘纸点燃或放入150℃左右的电缆油中检查，无“嘶嘶”声或白色泡沫出现，说明未受潮。 13、电缆标志牌应注明什么内容？编写有何要求？ 答：标志牌上应注明电缆线路设计编号、电缆型号、规格及始点，并联使用的电缆应有顺序号。要求字迹清晰、不易脱落。 14、直埋电缆的方位标志应设置在哪些位置？ 答：在电缆两端，电缆直线段50~100m处电缆接头几电缆改变方向的弯角处。 15、制作电缆接头用的黄腊绸带、黑玻璃漆带、无碱玻璃丝带等，施工前如何进行排潮处理？ 答：（1）恒温干燥法：将绝缘带卷成直径为25~30mm小卷，放入110~120℃恒温干燥箱内烘4~5h，冷却干取出，放入干燥的密封筒内。 （2）油浸排潮法：将绝缘带小卷放入恒温在120~130℃的电缆油中，离锅底保持30mm距离，经一定时间后油面不再产生泡沫后取出，装入贮有电缆油的桶中，油位应超过所有装入的物体并将其密封。 What inspection should be done before cable laying? Answer: (1) full support should be complete, paint. (2) the cable type, voltage and specifications comply with the design. (3) the cable insulation is good, when suspicious of oiled paper cable seal have, should carry on the judgment of be affected with damp be affected with damp; Buried cable and small bottom cable should be qualified by the dc withstand voltage test difficult; Oil-filled cable sample should be test. (4) the oil-filled cable oil pressure should not be less than 1.47 MPa. 21, crosslinked heat shrinkable cable accessories what are the advantages? A: this is a new type of material, it compared with other types of accessories now has superior electrical properties, small volume, low quality, easy installation, and the advantages of form a complete set of materials, in addition also has the climate resistance, resistance to uncleanness, flame retardant from extinguish, etc. 12, has doubts on oiled paper insulated power cable seal, how to use a simple way to check whether the cable insulation paper be affected with damp be affected with damp? A: put the cable insulation paper light or in the cable oil check of around 150 ℃, no "hiss" sound or white bubble, not be affected with damp be affected with damp. 13, cable signs should indicate what content? What are the requirements for writing? A: sign should be marked on the cable line design number, cable type, specification and the starting point, parallel cable shall have the serial number. The requirements are clear and not easy to fall off. 14, the orientation of the buried cable marks should be set up in what position? Answer: on both ends of the cable, cable line segment 50 ~ 100 m cable joint corner several cable to change direction. 15, make yellow wax ribbon for the cable joint, black lacquer, non-alkali glass ribbon, etc., how the moisture removal treatment before construction? Answer: (1) constant temperature drying: will be insulated coil into 25 ~ 30 mm diameter smaller volumes, in the 110 ~ 120 ℃ constant temperature drying oven drying within 4 ~ 5 h, cooling dry out and placed in dry sealed chamber. (2) in oil moisture removal method: will be insulated with small volume in a constant temperature in the cable oil of 120 ~ 130 ℃, keep a 30 mm distance from the bottom of the pot, after a certain period of time the oil level no longer produces bubbles out, in a cable of barrels of oil storage and oil level should be more than all the loaded object and seal it.