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【单选题】
在客车A1级检修质量对规中灯具点灯试验不良,每处扣___。___
A. 2分
B. 3分
C. 4分
D. 5分
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答案
D
解析
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已知兆欧表的两组线圈中的电流I1和I2,则指针偏转角与___有关。___
A. I1
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三相鼠笼型电动机常用的改变转速的方法是___。 ___
A. 改变电压
B. 改变极数
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餐车电冰箱大修后,控制箱须保修___个月。___
A. 6
B. 12
C. 18
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蓄电池充电时,电解液温度不得超过___℃。___
A. 45
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变压器采用相互绝缘的薄硅钢片制造,主要的目的是为了降低___。___
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中修后,餐车冰箱不锈钢内壳破损___mm以下允许补焊。___
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A. 40
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电压瞬时值和电流瞬时值的乘积,称为___功率。___
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GN-300型蓄电池充足电后,应能工作4h45min以上,如果工作3h30min,电压就低于1.0V时,此蓄电池的容量损失为___。___
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冷凝器每年进行___次维修保养。___
A. 1
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