【单选题】
(32657)保护三相异步电动机的热继电器的整定值，应为电动机( )。(1.0分)___
A. 额定电流的0.95～1.05倍
B. 额定电流的1.5～2.5倍
C. 启动电流的1.35倍
D. 启动电流的1.7倍
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(32663)内燃机是热机的一种，它是( )。(1.0分)___
A. 在气缸内燃烧并利用某种中间工质对外做功的动力机械
B. 在气缸内进行二次能量转换并利用某中间工质对外做功的动力机械
C. 在气缸内燃烧并利用燃烧产物对外做功的动力机械
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(32668)内燃机压缩过程的传热方向是( )。(1.0分)___
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B. 开始工质向外传热、后期工质吸热
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(32669)内燃机的能量转换过程中，正确的说法是（ ）。(1.0分)___
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(32672)内燃机在某一转速发出的功率与同一转速下所可能发出的最大功率之比称这为( )。(1.0分)___
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【单选题】
(32675)对于客车供电，下列说法正确的是( )。(1.0分)___
A. 内燃机车只能作为牵引机车用，不能向车厢供电
B. 电力机车的电压高，不能向车厢供电
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(32678)配备KTA-19G2柴油机的康明斯发电车并车时可输出电功率最大为( )。(1.0分)___
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(32679)装备KTA-l9G2柴油机的发电车中柴油机发电机组的额定功率是( ）。(1.0分)___
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D. 336kW
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(32682)运用客车整修时，各关键电气部件的接线端子须通电带负载（ ）以上，检测端子温升情况。(1.0分)___
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【单选题】
(32685)运用客车质量鉴定条件中，发电车配电控制屏面板变形、合页松脱，门锁及锁定装置作用不良属( )故障。(1.0分)___
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【单选题】
(32690)康明斯发电车柴油机调速控制箱面板上，油温表、水温表的起始刻度分别为( )。(1.0分)___
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(32691)装备MTU12V183TA12柴油机的发电车中柴油发电机组额定功率是( )。(1.0分)___
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【单选题】
(32692)MTU12V183TA12型柴油机工作时冷却水温度正常范围是( )。(1.0分)___
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【单选题】
(32693)康明斯发电车中并车成功后，若需取消并车，应进行的操作是( )。(1.0分)___
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(32695)在康明斯发电车电气控制电路中，( )线圈间存在直接的互锁关系。(1.0分)___
A. 1QF和3Q
B. 2QF1和2QF2
C. 1KA9和3KA9
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