单项选择题

The steady state difference between the control point and the value of the controlled variable, corresponding with the set point, is known as （）

A.dead band
B.control point
C.deviation
D.offset

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单项选择题

The ratio of output response to a specified change in the input is known as（）

A.primary feedback
B.deviation
C.sensitivity
D.dead band

单项选择题

The control mode where the position of the final control element has a linear relationship with the position or value of the controller, variable is known as（）

A.two position control
B.proportion control
C.reset control
D.rate control

单项选择题

Which of the following definitions can be used to define the term ‘offset ’ as a characteristic of controller action?（）

A.The period of time in which the set point and the control point coincide
B.The periodic change between the set point and the control point
C.The variable difference between the set point and the control point
D.The constant difference between the set point and the control point