TUNE YOUR LOOP: Questions to keep you sharp.

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

1. What is the purpose of troubleshooting?

2. The first step in troubleshooting is to:

[ordered_list style=”lower-alpha”]
  1. Put the controller in manual.
  2. Identify and locate the problem.
  3. Verify that something is wrong.
  4. Verify the problem is fixed.
  5. Fix the problem.[/ordered_list]

3. The last step in troubleshooting is to:

[ordered_list style=”lower-alpha”]
  1. Fix the problem.
  2. Verify that something is wrong.
  3. Verify that the problem is fixed.
  4. Follow-up to prevent future problems.
  5. Verify good controller tuning.[/ordered_list]

4. Select the one component that is not required in a feedback control loop:

[ordered_list style=”lower-alpha”]
  1. Controllers
  2. Transmitters
  3. Final Control Elements
  4. Transducer
  5. Sensor[/ordered_list]

5. Standard analog instrument current signal is:

[ordered_list style=”lower-alpha”]
  1. 1 to 5 mA
  2. 0.25 to 1.25 mA
  3. 4 to 20 mA
  4. 3 to 15 mA
  5. 3 to 27 mA[/ordered_list]


What are your answers before you read ahead?

1. To confirm that a problem exists, to identify the problem, to restore proper

2. c

3. d

4. d

5. c


From the ISA Course Troubleshooting Instrumentation and Control Systems (TC10) pre-instructional survey.

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