【单选题】
Chinese Mandarin (普通话) is ___ for foreigners to learn because the changes in the tone will totally change the meaning of words.
A. difficult
B. accessible
C. competitive
D. easy
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主、再热蒸汽温度超过额定温度14℃全年运行累计不能超过___小时。
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汽轮机停机后电动盘车故障,应在转子上做一记号,每隔___分钟手盘车( A ) ,电动盘车修复后应在两次手动盘车间隔时间中间投入。
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汽机进水紧急停机后___小时内禁止启动。
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汽机进水紧急停机再启动时上、下缸温差应<42℃,转子偏心度<___mm。
A. 0.075
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【单选题】
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A. 120
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缸温___℃以上时严禁退出凝结器水位、加热器水位、除氧器水位、汽缸温度等测点。
A. 120
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1号机组正常运行润滑油压应在___MPa
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机组正常运行时冷油器出口油温维持___℃。
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【单选题】
机组正常运行时各轴承回油温度正常应小于___℃
A. 77
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异常情况下再热汽温度不允许低于主汽温度___℃,运行时间不超过15分钟。
A. 56
B. 42
C. 28
【单选题】
正常运行时主汽温度、再热汽温度左右两侧偏差应小于___℃。
A. 28
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【单选题】
异常情况下任意4小时内主汽温度、再热汽温度左右两侧偏差不大于42℃,运行时间不能超过___分钟。
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任何情况下高排温度不允许超过___℃
A. 427
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A. 8
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A. 56
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1号机主油箱油位高二值为___。
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【单选题】
1号机主油箱油位高一值为___。
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【单选题】
1号机主油箱油位低一值为___。
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【单选题】
主油箱负压保持在___pa,
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顶轴油泵入口压力高于___MPa时, 顶轴油泵启动允许。
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