【单选题】
(71576)节流元件处正常的流动是气液混合体的流动(液体占80%以上),其流动声音比较( ),说明制冷剂量充足。[322120623](1.0分)___
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相关试题
【单选题】
(71577)电风扇在额定电压下连续工作1 h,测量绝缘电阻不小于( )。(1.0分)___
A. 0.1 M
B. 0.5 M
C. 1 M
D. 2 M
【单选题】
(71578)节流元件处不正常的流动是气体流动(极大部分),若其声音比较( ),比正常声音大,一般说明制冷剂量不足。[321110623](1.0分)___
【单选题】
(71579)通风机转动的方向正确与否,可以从( )大小来判断。[322110635](1.0分)___
【单选题】
(71580)制冷剂以气体状态进入制冷系统的称为( )加入法。[323110623](1.0分)___
A. 气体
B. 液体
C. 湿饱和蒸气
D. 干饱和蒸气
【单选题】
(71581)制冷剂以液体状态进入制冷系统的称为( )加入法。[322110623](1.0分)___
A. 气体
B. 液体
C. 湿饱和蒸气
D. 干饱和蒸气
【单选题】
(71582)制冷系统充入高压气体检漏时,应充入干燥空气或干燥( )。[312110623](1.0分)___
【单选题】
(71583)当高压流体通过小孔时,由于摩擦增加,静压下降,使流体达到( )调节流量的目的。[222120204](1.0分)___
【单选题】
(71584)热力膨胀阀是利用蒸发器出口制冷剂的( )自动调节供给蒸发器内制冷剂流量的节流阀。[223110212](1.0分)___
A. 过冷度
B. 过热度
C. 温度
D. 湿度
【单选题】
(71585)当流体在毛细管内流动时,由于管道摩擦阻力而产生( )。[223110223](1.0分)___
【单选题】
(71586)毛细管管径越小或管子越长,则流动的( )就越大。[223120223](1.0分)___
【单选题】
(71587)当高压制冷剂液体进入毛细管后,其( )会突然剧增。[222110223](1.0分)___
【单选题】
(71588)使用毛细管节流的制冷系统不需要( ),因而充入的制冷剂数量较少。[221110223](1.0分)___
A. 蒸发器
B. 冷凝器
C. 贮液器
D. 汽液分离器
【单选题】
(71589)列车运行途中,凡发生断路器自动分闸、熔断器熔断时,应首先确认该( )无短路后,方可复位或更换。(1.0分)___
A. 主回路
B. 干线
C. 支路
D. 其他负载
【单选题】
(71590)汽液分离器是防止( )制冷剂直接进入压缩机的装置。[233110204](1.0分)___
A. 过量
B. 气体
C. 液体
D. 气液混合物
【单选题】
(71591)段修后电风扇在额定电压下连续工作1 h,电扇风速须为( )。(1.0分)___
A. 3 m/s
B. 4 m/s
C. 3.5~4.5 m/s
D. 6 m/s
【单选题】
(71592)客车计划性甩挂应提前安排,需补编的车辆应提前( )进行技术整备。(1.0分)___
【单选题】
(71593)电风扇段修后,温升试验时其测量绝缘电阻不得小于( )。(1.0分)___
A. 0.2 M
B. 0.5 M
C. 1 M
D. 1.5 M
【单选题】
(71594)运用客车的闸片厚度不小于( ),超限时成对更换。(1.0分)___
A. 2 mm
B. 3 mm
C. 4 mm
D. 5 mm
【单选题】
(71595)铁路客车内客室的最小照度应达( )。(1.0分)___
A. 30 lx
B. 35 lx
C. 40 lx
D. 45 lx
【单选题】
(71596)铁路客车内餐厅的最小照度应达( )。(1.0分)___
A. 30 lx
B. 40 lx
C. 50 lx
D. 60 lx
【单选题】
(71597)铁路客车白炽灯钨丝熔点为( )。(1.0分)___
A. 1 000 ℃
B. 1 500 ℃
C. 3 000 ℃
D. 3 660 ℃
【单选题】
(71598)运用客车中密接式车钩缓冲装置,缓冲器的内半筒相对外壳后端面的伸出量不得超过( )。(1.0分)___
A. 2 mm
B. 3 mm
C. 4 mm
D. 5 mm
【单选题】
(71599)大修后,蓄电池容量应为额定容量的( )以上。(1.0分)___
A. 75%
B. 80%
C. 90%
D. 95%
【单选题】
(71600)列车在出发前,按规定对列车制动机进行机能试验,在制动保压状态下列车制动主管的压力1 min内漏泄不得超过( ),确认列尾装置作用良好。(1.0分)___
A. 10 kPa
B. 20 kPa
C. 30 kPa
D. 40 kPa
【单选题】
(71601)段修后,蓄电池容量应为额定容量的( )以上。(1.0分)___
A. 60%
B. 70%
C. 80%
D. 90%
【单选题】
(71602)使用车辆紧急制动阀时,在长大下坡道上,必须先看压力表,如压力表指针已由定压下降( )时,不得再行使用紧急制动阀,遇折角塞门关闭时除外。(1.0分)___
A. 50 kPa
B. 100 kPa
C. 150 kPa
D. 200 kPa
【单选题】
(71603)客车运用时,电蒸饭箱自动排气阀开启压力不大于( )。(1.0分)___
A. 0.03 kPa
B. 0.04 kPa
C. 0.05 kPa
D. 0.06 kPa
【单选题】
(71604)客车车体配线段修后,墙板引出线的支线截换时须留有( )以上的余量。(1.0分)___
A. 80 mm
B. 100 mm
C. 150 mm
D. 200 mm
【单选题】
(71605)属于运用客车质量鉴定管理部分A类问题的是( )。(1.0分)___
A. 安全号志不清洁
B. 安全号志破损
C. 安全号志无法固定
D. 安全号志失效
【单选题】
(71606)KZS/M-Ⅰ型轴报器能自动巡测( )轴头的温度。(1.0分)___
【单选题】
(71607)国产单元式铁路客车空调系统中使用的制冷剂为( )。(1.0分)___
A. R12
B. R13
C. R22
D. R28
【单选题】
(71608)压力表、制动软管效验过期在运用客车质量鉴定中属于( )故障。(1.0分)___
【单选题】
(71609)单元式空调装置的制冷系统由压缩机、冷凝器、节流装置和( )等组成。(1.0分)___
A. 蒸发器
B. 毛细管
C. 截止阀
D. 汽液分离器
【单选题】
(71610)盘型制动单元失效在运用客车质量鉴定中属于( )故障。(1.0分)___
【单选题】
(71611)折棚风挡破损长度超过( )在运用客车质量鉴定中属于C类故障。(1.0分)___
A. 100 mm
B. 200 mm
C. 300 mm
D. 400 mm
【单选题】
(71612)BSP客车电气系统的分类代码400系列表示( )。(1.0分)___
A. 供电系统
B. 照明系统
C. 空调系统
D. 轴报及制动系统
【单选题】
(71613)无消防锤在运用客车质量鉴定中属于( )故障。(1.0分)___
【单选题】
(71614)电感器在电路中可以通过( )。(1.0分)___
A. 交流电
B. 直流电
C. 交流电和直流电
D. 高压电
【单选题】
(71615)属于运用客车质量鉴定A类故障的是( )。(1.0分)___
A. 坐席安装松动合计不超过2件
B. 坐席标号不准确
C. 坐席破损
D. 缺少坐席
【单选题】
(71616)镉镍蓄电池在常温下贮存一个月,镉镍蓄电池自放电量约为( )。(1.0分)___
A. 10%
B. 30%
C. 40%
D. 50%
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Teaching can be a tiring and ____ job.
A. meaningless
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The building is partly a museum and partly a private ____.
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Stop ______ your foot.
A. tossing
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C. exhibiting
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A. finish what I did
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C. would finish what I was doing
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The speaker, ______ for her splendid speeches, was warmly received by the audience.
A. having known
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No sooner had we reached the top of the hill ______ we all sat down to rest.
A. when
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___ energy under the earth must be released in one form or another, for example, an earthquake.
A. Accumulated
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C. Assembled
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Please ___ me for my rudeness. I really do not know the custom here.
A. engaged
B. comfort
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Sometimes it is very difficult to ___ some of the English words. Even the native speaker cannot help.
A. decrease
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C. define
D. delight
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In the wife’s eyes, his ___ to their marriage life is far from perfect.
A. requirement
B. commitment
C. participation
D. reflection
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This newspaper often ___ the government’s opinion, not the public opinion.
A. affects
B. reacts
C. reflects
D. recognizes
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It is predicted that heavy rains are ___ to flood the area in a few days.
A. frightening
B. threatening
C. scattering
D. warning
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I chose to work abroad to improve my career ___.
A. future
B. path
C. prospect
D. expect
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Long before I ever went there, Africa was alive in my ___.
A. image
B. imaginary
C. imaginative
D. imagination
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The spectacle of the aurora may appear to dazzle and ___ the observer’s eye.
A. enchant
B. charm
C. fascinate
D. draw
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The top prize has enhanced the musician’s ___.
A. fame
B. status
C. courage
D. faith
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Compared with Westerners, the ___ use less butter. They prefer the very healthful peanut oil.
A. foreigners
B. Southerners
C. Northerners
D. Orientals
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Within a few days she had become seriously ill, ___ great pain and discomfort.
A. surviving
B. suffering
C. affecting
D. accepting
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People of their generation who lived through World War II have ___ memories of confusion and incompetence.
A. vivid
B. strong
C. acute
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Not a breath of fresh air ___ the long white curtains.
A. blew
B. stirred
C. whirled
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Figures showed customer complaints had ___ to record levels and profits were falling.
A. added
B. climbed
C. accumulated
D. soared
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Thanks for the advice, but this is something I have to ___ out myself.
A. fulfill
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A. magnificent
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C. huge
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Vietnam made an official ___ that the meeting be postponed.
A. require
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C. request
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Luke was allowed to sit directly behind the pilot and ___ with him.
A. converse
B. inverse
C. perverse
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Maybe this work is not ___, but it will live for a while.
A. mortal
B. deadly
C. immortal
D. worldly
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A. gather
B. accumulate
C. accelerate
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This will enable the audience to sit in ___ while watching the shows.
A. comfort
B. rest
C. relax
D. cozy
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Throughout the house, the views are a constant source of surprise and ___.
A. grief
B. pleasant
C. happy
D. delight
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Imagination is sometimes more ___ than reality.
A. vivid
B. real
C. bright
D. rich
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It is but a step from the ___ to the ridiculous.
A. interest
B. top
C. bottom
D. sublime
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My educational ___ is simple: learning should be fun.
A. philosophy
B. psychology
C. physiology
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I chose to work abroad to improve my career ___.
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