网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
If the head pressure of a reciprocating refrigeration compressor is excessive
A.the relief valve should open before the high pressure cutout
B.the relief valve should open and allow the excess refrigerant to flow to the receiver
C.the high pressure cutout switch should operate before the relief valve opens
D.you should close the discharging valve
参考答案
更多 “ If the head pressure of a reciprocating refrigeration compressor is excessiveA.the relief valve should open before the high pressure cutoutB.the relief valve should open and allow the excess refrigerant to flow to the receiverC.the high pressure cutout switch should operate before the relief valve opensD.you should close the discharging valve ” 相关考题
考题
Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?A.Pressure-reducing valveB.Unloading valveC.Counterbalance valveD.Pressure-relief valve
考题
Whichcharacteristicorconditionwillhavethegreatestoil'sviscosityeffectonincreasinghydraulic()
A、PourpointB、CloudpointC、VacuumD、Pressure
考题
Regulations require that cargo tanks carrying grades D or E liquids on tank barges be vented with ______．A.Gooseneck vents and flame screensB.Pressure-vacuum relief valvesC.Branch vent lines and a vent headerD.Forced draft blowers
考题
We have to change the public's perception that money is everything.A:sightB:interestC:beliefD:pressure
考题
对于环境已经恶化的区域，更适合采用state-pressure-response框架制定管理指标体系（）For an area where the environment has deteriorated, the State-Pressure-Response framework will be more suitable for the development of its management index system（）
考题
对于环境已经恶化的区域，更适合采用（）制定指标 For regions where the environment has been deteriorated, it is more appropriate to adopt （） for indicator settlementA．pressure-state-response框架 The pressure-state-response frameworkB．state-pressure-response框架 The state-pressure-response frameworkC．response-pressure-state框架 The response-pressure-state frameworkD．response-state-pressure框架 The response-state-pressure framework
热门标签
最新试卷