1.Gasoline island conduits must be sealed to:
1.加油岛上的导管必须进行密封,其密封深度应达到:
2.What is the maximum total bend allowed in a single run of metal conduit?
2.单段金属导管布线中允许的最大总弯曲角度是多少?
3.Max height of a ladder-jack scaffold:
3.梯架式脚手架(ladder-jack scaffold)的最大高度为:
4.Use a dry transformer to:
4.使用干式变压器的目的是:
5.Which device connects a grounding conductor to a ground rod?
5.哪种装置用于将接地导体连接到接地棒上?
6.Minimum height for outlets in hazardous shops:
6.在危险车间内,插座的最低安装高度为:
7.If voltage drops, you should:
7.如果发生电压降(voltage drop),你应该:
8.Min distance between outlets on opposite sides of a firewall:
8.防火墙两侧相对位置的插座之间,应保持的最小距离为:
9.Which type of electrical current is more efficient for long-distance transmission?
9.哪种类型的电流更适合用于远距离输电?
10. To locate an electric meter, check with:
10.若要确定电度表(电表)的安装位置,应咨询: