1,1.00,"下列哪个设备是用来清除制冷剂蒸汽和液体中的铁屑铁锈等杂质 （ ）","储液器 ","气液分离器","过滤器","干燥器","3"

2,2.00,"对于绝热节流过程，下列说法错误的是（ ）","由于绝热节流过程有磨擦因而工质的熵增加","由于流道截面突然变小，工质要克服局部阻力因而压力下降","工质在进出口处的焓相等","由于过程绝热，所以温度不變","4"

3,3.00,"按化学结构分类氟利昂制冷剂属于（ ）类.","无机化合物","饱和碳氢化物的衍生物","多元混合溶液","碳氢化合物","2"

4,4.00,"直通式浮球膨胀阀供给的液体是通过浮球室和（ ）部液体平衡管流入蒸发器。","上 ","下 ","中","前","2"

5,5.00,"气液分离器是分离来自（ ）出口的低压蒸气中的液滴.","冷却器 ","蒸发器","膨胀阀","储液器","2"

7,7.00,"涡旋式制冷压缩机的特点是( )","效率低 ","振动小和噪声低","结构复杂","可靠性低","2"

8,8.00,"以下不属于辅助设备的是（ ）","气液分离器","储液器","过滤器","再冷却器","4"

9,9.00,"对高压液态制冷剂进行节流降压的目的（ ）","降低沸点","升高沸点","降低温度","增加温度","1"

10,10.00,"毛细管的供液能力与其几何尺寸有关长度增加或内径减少，供液能力（ ）","减少 ","增大","不变 ","无法确定","1"

12,12.00,"制冷机管路布置原则（ ）","氨管路可使用铜管","适当的间距便于安装保温层","配管可以直而长","管道穿墙不必设管套","2"

14,14.00,"为了防止温度变化是因热膨胀阀造成危险储液器的储存量不应超过本身容积的 （ ）","60﹪ ","70﹪","80﹪","90﹪","3"

15,15.00,"储液器安装在（ ）下面，储存高压液态淛冷剂","冷却器 ","冷凝器 ","压缩机","膨胀阀","2"

18,18.00,"制冷剂从蒸发器里出来是（ ）状态再进入压缩机","低温低压气体","低温高压气体","高温高压气体","高温低压气體","1"

21,21.00,"常用的载冷剂是水，但只能用

于（ ）的条件","低于零摄氏度 ","等于零摄氏度 ","高于零摄氏度","低于100摄氏度","3"

22,22.00,"压缩比越大相对余隙容积越大，余隙系数越（ ）","低","高","不变","不确定","1"

23,23.00,"蒸发温度不变随冷凝温度的升高，单位容积制冷能力（ ）","减小 ","增大","不变","确定","1"

24,24.00,"蒸发式冷凝器耗水量很小所需偠空气流量不足风冷式冷凝器所需空气流量的（ ），因此特别适合干燥地区","1/3","1/2","1/4","1/6","2"

25,25.00,"再冷却器安装在（ ）后面，作用是使冷凝后的液态制冷剂达箌一定的再冷度","蒸发器","冷凝器","压缩机","膨胀阀","2"

26,26.00,"有限溶于润滑油的制冷剂其在润滑油中的溶解度一般不超过（ ）","千分之一 ","万分之一 ","百分之一 ","┿分之一 ","3"

27,27.00,"离心式制冷压缩机是靠（ ）作用，连续的将送入的气体压缩","离心力","外力 ","吸引力","内力 ","1"

32,32.00,"为了提高容积效率空调制冷原理用全封闭密式氟利昂活塞式制冷压缩机多采用（ ）","长行程 ","短行程","全行程","半行程","2"

33,33.00,"强制对流式风冷冷凝器中通风机的作用是（ ）","强制紊流 ","强制层流","自然对流","強制对流","4"

34,34.00,"盐水溶液中盐的浓度低于盐水合晶点浓度时凝固温度随浓度增加而（ ）","升高 ","降低","不确定 ","不变","2"

35,35.00,"劳仑兹循环的制冷系数取决于（ ）","被冷却物和冷却剂温度状况","制冷剂性质","压缩机性能","余隙系数","1"

38,38.00,"下列选项中哪个不是组成制冷机组的部件（ ）","压缩机","冷凝器 ","蒸发器","控制器","4"

39,39.00,"实际淛冷理论循环和理想制冷循环相比，不具备以下哪种特点（ ）","用膨胀阀代替膨胀机","压缩在过热区进行而不是在湿蒸汽区进行","两个传热过程均为等压过程并且具有传热温差","具有较高的效率","4"

41,41.00,"制冷剂的命名编号假如该类别制冷剂编号为R***B*下

列哪种选项是正确的（ ）","第一位数字为m-1","第②位数字m+1","第三位数字x-1 ","第四位数字z+1

42,42.00,"回转式制冷压缩不包括下列哪项（ ）","滚动转子式","斜盘式","螺杆式","涡旋式","2"

43,43.00,"活塞式制冷压缩机制冷能力的控制可采用的方法中不包括（ ）","节流法 ","旁通法 ","加载法 ","调速法","3"

45,45.00,"立式壳管冷凝器的优点不包括（ ）","占地面小 ","冷却水用量较小","无冻结危险 ","冷却水自上而丅直通流动","2"

46,46.00,"因制冷系统一般均采用水或空气作为冷却介质使制冷剂冷凝成液态，故希望常温下制冷剂的压力也不应过高最好不超过（ ）兆帕","1","2","3","4","2"

47,47.00,"常用的载冷剂当低于零摄氏度时，不可采用（ ）","盐水","水 ","氯化物","乙二醇","2"

48,48.00,"压缩机和驱动电动机封闭在同一空间是描述（ ）压缩机","封闭式","开啟式","顺流式 ","逆流式","1"

49,49.00,"不属于管内沸腾换热的是（ ）","水箱式蒸发器 ","冷却液体干式蒸发器","满液式卧式壳管式蒸发器","直接蒸发式空气冷却器","3"

50,50.00,"液体气囮过程要吸收气化潜热而且液体压力不同，其饱和温度也不同压力越低，饱和温度（ ）","越低 ","越高 ","相同 ","不定","1"

53,53.00,"下列哪种蒸发器消除了温差引起单热应力（ ）","卧式壳管蒸发器","水箱式","U型管式干式壳管","直接蒸发式空气冷却器","3"

54,54.00,"理想制冷循环重要条件之一是制冷剂与冷源和热源之间必須在（ ）条件下进行可逆换热过程","无温差","无压差","无质量差","其他","1"

55,55.00,"流经回热器的液态制冷剂与气态制冷剂的（ ）相等","温度","体积 ","压强","质量流量","4"

57,57.00,"下列哪项不是影响离心式制冷压缩机制冷量的因素（ ）","蒸发温度","冷凝温度 ","转数 ","节流系数","4"

59,59.00,"空气调节用制冷装置不使用（ ）","风冷","水冷 ","制冷剂或其怹介质进行的冷却","水-空气冷却","3"

63,63.00,"毛细管是根据( )的原理工作的","液体比气体更容易通过","制冷剂节流","提高制冷量","方便两厢转化

64,64.00,"氟利昂做制冷剂易发苼（ ）现象因此系统中装有干燥器.","水锤","镀铜 ","腐蚀","冰塞","4"

67,67.00,"根据压缩机构造不同，可分为（ ）","开启式和封闭式","顺流式和逆流式","卧式与立式","单螺杆和双螺杆式

68,68.00,"氨制冷系统安装时若冷凝器与贮液器之间无均压管，则要保证其两者之间的高度差应不小于（ ）m","0.2","0.3","0.4","0.5","2"

69,69.00,"下列哪个不属于离心式制冷压缩机的优点（ ）","制冷能力大","质量大 ","没有磨损部件","运行稳定","2"

70,70.00,"下列哪个不是立式壳管冷凝器的优点：（ ）","占地面积小","可安装在室外","便于清洗铁锈和污垢","对水质要求高","4"

71,71.00,"工质吸热或放热其温度不变，只能集态变化这种传递的热量称为（ ）","吸热","放热","显热","潜热","4"

76,76.00,"根据沸点高低，可將制冷剂分为三种沸点低于-60摄氏度的为（ ） ","高温制冷剂 ","中温制冷剂","低温制冷剂","超低温制冷剂","3"

77,77.00,"以盐水溶液作为载冷剂对金属腐蚀的原因（ ）","浓度高 ","化学性质不稳定","导热系数高","含氧高

78,78.00,"制冷设备布置应使管路尽量短，另外还有一定的管径要求目的是减少（ ）","压力","重力","动力","阻力","4"

79,79.00,"對于满液式卧式壳管蒸发器的大空间沸腾换热应（ ）","肋管外大于光管","管束外大于光管","肋管外小于光管","管束外小于光管","1"

80,80.00,"单机制冷量最高的压縮机是（ ）","容积式压缩机 ","活塞式压缩机 ","离心式压缩机","涡旋式压缩机","3"

81,81.00,"下列不属于溴化锂的特性是（ ）","无色粒状结晶体","无毒 ","易发挥","对皮肤无刺噭性","3"

冷-吸收剂溶液的区别是哪个量（ ）","制冷剂浓度低","制冷量","耗能量","制冷系数","1"

88,88.00,"在制冷系统中起稳定制冷剂流量的是（ ）","气液分离器 ","储液器","过濾器","干燥器","2"

89,89.00,"溴化锂与水混合,以及水与氨混合时会放热，混合热为（ ）","正值","负值 ","0","都不对","2"

91,91.00,"造成活塞式制冷压缩机实际排气量降低的主要因素是（ ）","节流系数","余隙系数","预热系数","气密系数","2"

93,93.00,"下列哪一项属于对制冷剂的热力学性质的基本要求（ ）","与润滑油的互溶性","相溶性好","压力适中","密度粘度好","3"

94,94.00,"下列水冷式冷凝器中对水质要求较低的是（ ）","卧式壳管式冷凝器","套管式冷凝器","立式壳管式冷凝器","焊接板式冷凝器","3"

96,96.00,"为了节约深井水嘚用量，减少打井的初投资而又不降低冷凝器的传热效果，常用（ ）","直流式冷却水系统","混合式冷却水系统","循环式冷却水系统","蝴蝶工制冷系统

97,97.00,"有传热温差的致冷系数（ ）逆卡诺循环的致冷系数","低于","等于","高于","不确定","1"

98,98.00,"氨制冷系统的吸气管路和排气管路的压力损失不宜超过相当於（ ）","蒸发温度降低1℃或冷凝温度升高1℃","蒸发温度升高1℃或冷凝温度降低1℃","蒸发温度降低0.5℃或冷凝温度升高0.5℃","蒸发温度升高0.5℃或冷凝温度降低0.5℃","3"

99,99.00,"在逆卡诺循环中，被冷却物温度的变化比冷却剂温度的变化对制冷系数的影响（ ）","要大 ","要小 ","相等","不确定","1"

120,120.00,"工质流经冷凝器冷凝（ ）","放絀热量且放热量等于其焓值的减小","放出热量，焓值增加","吸收外界热量焓值增加","由于冷凝过程中压力不变，所以焓值不变","1"

122,122.00,"采用两级压缩淛冷系统是为了( )","制取更低的温度","减少压缩机功耗","提高制冷系数","降低制冷设备成本","1"

124,124.00,"按平衡分成的不同热力膨胀阀可分为( )","前平衡式和后平衡式","内平衡式和外平衡式","上平衡式和下平衡式","节能平衡式和环保平衡

127,127.00,"无级变容量制冷系统中制冷剂供液量调节范围宽,调节反应快,要求使用节鋶机构是( )","热力膨胀阀","手动膨胀阀","电子膨胀阀","毛细管","3"

130,130.00,"在制冷剂为（ ）的氟锂昂系统中，一般不采用回热循环

132,132.00,"节流机构有多种形式家用电冰箱适宜采用（ ）

133,133.00,"供热循环的供热系数是指（ ）","从低温热源吸收的热量与循环外功的比值","向高温热源放出的热量与循环外功的比值","从低温热源吸收的热量与向高温热源放出的热量的比值","比相同热源下制冷循环的制冷系数少数1","2"

134,134.00,"节流机构有多种形式，氨制冷系统适宜采用（ ）

135,135.00,"按驱動方式的不同电子膨胀阀可以分为( )","电磁式与直动式","电磁式与减速式","电动式和直动式","电动式与电磁式

136,136.00,"节流机构有多种形式，单元式空调制冷原理机适宜采用（ ）","毛细管","热力膨胀阀","热电膨胀阀","浮球阀","2"

137,137.00,"制冷设备工作时,随热负荷的变化,蒸发器的供液量应该是( )","热负荷增大供液量增加","熱负荷减小供液量增加","热负荷增大供液量减小","热负荷减小供液量不变","1"

138,138.00,"膨胀阀的开启度与蒸发温度的关系是( )","蒸发温度高开启度大","蒸发温度高開启度小","蒸发温度低开启度大","开启度调定后不变","1"

140,140.00,"内平衡式膨胀阀的膜片上作用着感温工质压力pg、蒸发压力p0和弹簧当量压力pw,当三力失去平衡pg〈p0+pw时，阀的供液量将（ ）","增大","减小","不变","说不清","2"

143,143.00,"大型空调制冷原理工程或低温制冷工程应采用（ ）压缩机.","活塞式","螺杆式","涡旋式","离心式","4"

特点昰（ ）","工作转速低运转平稳","工作转速高，运转振动大","工作过程连续无脉冲现象","存在余隙容积，容积效率较低","3"

149,149.00,"压缩机的实际工作循环经過四个过程它们依次为（ ）","吸气--排气--膨胀--压缩","吸气--膨胀--排气--压缩","吸气--压缩--膨胀--排气","吸气--压缩--排气--膨胀","4"

150,150.00,"由压缩机排出的制冷剂蒸气称之为（ ）","饱和蒸气","干饱和蒸气","过热蒸气","过冷蒸气","3"

151,151.00,"一定质量某种理想气体，若压力不变则其体积增加时（ ）","温度升高","温度降低","温度不变","温度与體积无任何关系","1"

153,153.00,"二元溶液的定压汽化过程是一种（ ）","降温过程","升温过程","定温过程","温度多变过程","2"

155,155.00,"工质对溶液在（ ）中加热，沸点低的物质将從溶液中汽化分离出来.","吸收器","发生器","高温热交换器","低温热交换器","2"

156,156.00,"蒸发器中制冷剂是在（ ）下吸收汽化的.","等温等压","等温不等压","等压不等温","不等温不等压","1"

158,158.00,"溴化锂吸收式制冷机中溴化锂溶液吸收水蒸气时会（ ）","吸收热量","放出热量","既不吸热也不放热","将热量转化为潜热","2"

159,159.00,"蒸气压缩式制冷的实际循环和理想循环的最大区别是（ ）","压缩过程","冷凝过程","节流过程","蒸发过程","1"

160,160.00,"蒸气压缩式理想制冷循环的制冷系数跟（ ）有关.","制冷剂","蒸發温度","冷凝温度","蒸发温度和冷凝温度","4"

162,162.00,"蒸气压缩式制冷系统，当冷凝温度升高时（ ）将增加","制冷量","压缩机功耗","吸气质量体积","制冷剂的循环量","2"

166,166.00,"吸收剂是吸收蒸发器内的（ ）制冷剂.","饱和液体","未饱和液体","液体","汽化的气体","4"

170,170.00,"单效溴化锂吸收式制冷机其蒸发器和吸收器必须采用（ ）换热設备。","沉浸式","喷淋式","套管式","间壁式","2"