TUNE YOUR LOOP: Questions to keep you sharp.

Tune Your Loop is a series of posts consisting of questions from ISA Training Courses.

1. Which of the following types of valves has the highest gain when the valve is nearly closed?

[ordered_list style=”lower-alpha”]
  1. Quick opening
  2. Equal percentage
  3. Fail open
  4. Linear[/ordered_list]

2. A controller in which an increase in output to the manipulated variable results in a
decrease in the controlled variable is called?

[ordered_list style=”lower-alpha”]
  1. Reverse acting
  2. Direct acting
  3. Fail safe
  4. Non-linear[/ordered_list]

3. Which of the following control modes causes the controller output to increase or
decrease at the same time the input increases or decreases?

[ordered_list style=”lower-alpha”]
  1. Integral
  2. Proportional
  3. Derivative
  4. Reset[/ordered_list]

4. Which of the following terms describe a control strategy in which the output of
one controller is used to manipulate the setpoint of another controller?

[ordered_list style=”lower-alpha”]
  1. Ratio
  2. Cascade
  3. Feedforward
  4. Fail safe[/ordered_list]

5. Which of the following types of control systems is typically programmed in ladder
logic:

[ordered_list style=”lower-alpha”]
  1. Programmable Logic Controllers (PLCs)
  2. Distributed Control Systems (DCSs)
  3. Single Loop Digital Controllers
  4. FieldBus[/ordered_list]

 

What are your answers before you read ahead?

1. a

2. a

3. b

4. b

5. a

 

From the ISA Course Fundamentals of Industrial Process, Measurement, and Control (FG05) pre-instructional survey.

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