悬吊TQ-35液压套管钳用的钢丝绳直径()英寸
A. 不小于1/2
B. 不小于1/4
C. 不大于1/2
接地距离保护的零序电流补偿系数K应按线路实测的正序阻抗Z1和零序阻抗Z0,用公式K=(Z0-Z1)/3Z1计算获得。实用值宜大于或接近于计算值。
A. 正确
B. 错误
货运索道跟客运索道差不多,只不过是用来运输货物的。
A. 正确
B. 错误
An electric heater built into some smaller diesel engines is used to ().
A. raise lube oil viscosity for easier starting in cold weather
B. increase air inlet temperature
C. increase compression ratio
D. increase jacket water temperature for easier starting in cold weather