TUNE YOUR LOOP: Questions to keep you sharp.

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

1. If the primary source to a single phase transformer is above 150 V how must the secondary side be grounded?

[ordered_list style=”lower-alpha”]
  1. it is not supposed to be grounded
  2. to the service ground
  3. through a spark gap
  4. by DCS[/ordered_list]

2. Electrical current will only flow through a completed circuit.

[ordered_list style=”lower-alpha”]
  1. TRUE
  2. FALSE[/ordered_list]

3. Earth ground connections are used in order to cause a circuit breaker to instantaneously trip in the event of an unintentional ground fault.

[ordered_list style=”lower-alpha”]
  1. TRUE
  2. FALSE[/ordered_list]

4. A grounding conductor normally carries current.

[ordered_list style=”lower-alpha”]
  1. TRUE
  2. FALSE[/ordered_list]

5. A grounded conductor normally carries current.

[ordered_list style=”lower-alpha”]
  1. TRUE
  2. FALSE[/ordered_list]

 

What are your answers before you read ahead?

1. b

2. a

3. a

4. b

5. a

 

From the ISA Course Electrical Noise Effects on Instrumentation Control Equipment (TI21) pre-instructional survey.

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