单选题外平衡式热力膨胀阀用于管路长、流阻大的蒸发器，出口过热度大于3℃时开启。现将它改用内平衡式热力膨胀阀，则该阀开启时的过热度将（）。A低于3℃B高于3℃C不变D不一定
单选题
外平衡式热力膨胀阀用于管路长、流阻大的蒸发器，出口过热度大于3℃时开启。现将它改用内平衡式热力膨胀阀，则该阀开启时的过热度将（）。
A
低于3℃
B
高于3℃
C
不变
D
不一定
参考解析
解析：
暂无解析
相关考题：
单选题The officer in charge of the navigational watch shall not hand over the watch to the relieving officer if（）.Athere is reason to believe that the latter is not capable of carrying out the watchkeeping duties effectivelyBthe ship is fitted with automatic steeringCthere is daylight or darknessDat no time shall the bridge be left unattended
单选题The frequency of the alternating current generated by a synchronous generator is governed by the speed and the（）Afull excitationBloadCpower factorDnumber of poles
单选题Refrigeration machinery is often surveyed before loading reefer cargo. This survey is usually performed by the（）.AMSABCCSCCCIQDlocal port authority
单选题The connection facilities for the international shore connection must be located to provide access（）.Aon either side of the vesselBas close as possible to the houseCon the main deckDon each level of the accommodation space
单选题The greatest detrimental effect on idle electrical equipment, such as cargo pump motors, is the（）.Aloss of residual magnetismBabsorption of moisture in the insulationCinsulation varnish flakingDdirt collecting on the windings
单选题在喷嘴挡板机构的静特性曲线上（）。 ①两端变化快，中间变化慢 ②两端变化慢，中间变化快 ③上端变化快，下端变化慢 ④上端变化慢，下端变化快 ⑤中间段背压与挡板开度成比例关系 ⑥工作段由放大器起步压力决定A①②③B④⑤⑥C②⑤⑥D②③④
单选题在风浪较大的水域，由直升机接送引航员，在直升机降落船舶甲板过程中，下列操船行动哪项正确？（） Ⅰ在直升机降落船舶甲板过程中，保持航向和航速 Ⅱ直升机飞近船舶时，应操纵船舶斜向迎风 Ⅲ在直升机降落船舶甲板过程中，按规定准备应急 Ⅳ直升机飞近船舶时，应挂妥船旗和三角旗AⅠ～ⅢBⅠ～ⅣCⅠ、ⅡDⅡ、Ⅲ
单选题在中国，由于暂停营运或长时间修理等原因在中国沿海港口水域内拟停航（）天及以上的中国籍船舶，船舶或所属船公司应向中国LRIT国家数据中心递交暂停发送LRIT信息申请。A1B4C7D15