【判断题】
东风4B型内燃机车膨胀水箱冷却水的装载量为1200kg
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运用中，只要机油和冷却水温度超过正常范围，要及时调整温度控制阀，防止机车故障发生
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柴油一发电机组的弹性支承，可以避免柴油机在高速或低速时发生共振
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盘车机构主要用于盘车检查柴油机运动部件的运动状态
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四冲程柴油机转速为1000r／min时，凸轮轴转速为2000r／min
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在增压器机油进油管上设有保压阀，用以限制进入增压器的机油压力和流量
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柴油机起动循环的油路为：油底壳一起动机油泵一逆止阀一主机油泵出口一机油粗滤器一机油热交换器一柴油机、增压器各润滑处所一油底壳
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柴油机冷却水温过低时，将导致混合气体形成的条件恶化，燃烧不完全，破坏了柴油机的热力状态
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调速器的功调电阻为回转式滑动可变电阻，电阻滑环上共布置73个电阻，总电492．9Ω
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虽然柴油机的紧急停车不会影响柴油机使用寿命，也不宜无故按动紧急停车按钮
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增压器进气道帆布过松，会造成柴油机的增压器喘振
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柴油机负荷时间过长，是造成水温高的原因之一
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柴油机油、水温度低是造成柴油机敲缸的原因之一
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致使机油乳化的原因，主要是机油内含水量较高
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由于喷油器雾化不良，燃油系统有空气，活塞刮油环反装或刮油性能差，均会导致柴油机冒黑烟
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高温水系统水管上的温度控制阀漏油，会造成油水互窜，导致膨胀水箱有油
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当柴油机冷却水温度超过88℃时，水温继电器动作，通过中间继电器2ZJ的作用，柴油机卸载
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柴油机一发电机组的功率输出端通过传动轴与静液压变速箱连接
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回拉手柄时引起柴油机过载的原因是增、减载针阀开度过小
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在正常情况下，联合调节器内的最高转速止钉丢失时，不会造成飞车事故
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主机油泵出口压力为550kPa时，调整阀开启压力为550kPa
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柴油机在空转时转速正常，加载时转速不正常时，多为喷油泵故障或供油齿条卡滞
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柴油机润滑间隙过大或过小，同样会造成轴颈或轴瓦的拉伤
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柴油机放水后再上水时，必须开放有关排气阀
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一个二极管被击穿短路后，1RD将首先熔断，有时出会出现2RD同时熔断现象
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感应子牵引励磁机的感应电动势是由定子上的电枢绕组产生并输出的
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东风4机车启动接触器QC和主发励磁接触器LC，采用CZO-40／20型电磁接触器
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当机车轮对发生空转时，通过空转继电器线圈内的电流达0．1A时，线圈吸合，空转信号灯亮
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空转继电器的构造与接地继电器相同，动作后能自锁
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东风4机车用TQFR-3000型同步牵引发电机，其定子上设励磁绕组，转子上设电枢绕组
【判断题】
牵引发电机的励磁由励磁机L供给，L发出的三相交流电经2ZL整流输出直流电，向牵引发电机励磁绕组供电
【判断题】
运行中蓄电池放电，手按2QA，空压机工作正常说明QF发电
【判断题】
使用接地开关DK及故障开关GK，均无法消除DJ动作时，属主电路瞬间接地
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蓄电池的电解液是浓硫酸与自来水按一定比例配成的稀硫酸液
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方向转换开关1—2HKf在前进位时，两对辅助触头(267-269)串联后控制走车电路，保证该开关均在前进位，才能接通走车电路
【判断题】
Rlcfl、Rlcf2整定后，Rgt在减载极限位时CF有最大的励磁电流
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磁场削弱开关XKK置于自动位和手动位都不起作用，说明过渡装置GDZ故障
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柴油机运转时，任意一个增压器机油入口处的压力低于78kPa都会使1YJ或2YJ释放
【判断题】
柴油机启动后，接地试灯的插头插入插座，对电路没有不良影响
【判断题】
当机车不能换向而用手扳动换向开关手柄时，必须在机车停车时进行，严禁机车运行时扳动换向器进行换向
【判断题】
无级调速机车主手柄置于升位，5、6、7号触头闭合，柴油机转速上升
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