The control mode in which tile final control element is moved from one of two fixed positions to the other is known as______.

A．dead band action

B．neutral zone action

C．range

D．on-off action

[单选题]The mode of control employed by an alarm circuit is aA．two position controlB．single speed floating controlC．proportional speed floating controlD．reset control

[单选题]Which one of these statements about connecting to the Internet is true? (68) .(68) A．The Internet can only be used to link computers with same operating systemB．The Internet can be used to connect computers with different ISPC．You must have a telepho

[单选题]Which mode of transportation is most flexible? （）A . AirB . ShipC . RailD . Motor

[单选题]Which timing mode is most appropriate for an ONS 15454 that has lost its BITS-1 and optical references?（）A . line timingB . loop timingC . internal timingD . through timingE . external timing

[单选题]_______control system is one in which the control action is independent of the output.A．Feed backB．Negative feed backC．Close loopD．Open loop

[单选题]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

[单选题]To control and manage processes, which of the following data structures should be set up?A．PCTB．PCBC．PCMD．PCL

[单选题]In the following activities, which one needs most control?A.Retelling.B.Fin

[单选题]In the following activities, which one needs most control?A.Retelling.B.Fin

[单选题]A company, which prepares its financial statements in accordance with IFRS