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Free NERC Practice Questions

10 free, exam-style System Operator Certification (NERC) practice questions with answers and explanations. No signup required. Work through them below, then take the full free NERC practice test to study every exam domain.

Question 1

What does the acronym 'PSE' stand for in E-Tag terminology?

  1. Purchasing-Selling Entity
  2. Power System Entity
  3. Primary Scheduling Entity
  4. Power Supply Exchange
Show answer & explanation

Correct answer: A - Purchasing-Selling Entity

Question 2

Which E-Tag state indicates that all parties have approved the transaction and it is ready for implementation?

  1. PENDING
  2. CONFIRMED
  3. IMPLEMENTED
  4. APPROVED
Show answer & explanation

Correct answer: B - CONFIRMED

Question 3

Who must approve an Interchange Transaction before it becomes Confirmed Interchange?

  1. The Purchasing-Selling Entities only
  2. The Reliability Coordinator only
  3. All involved Balancing Authorities and Transmission Service Providers
  4. The Load Serving Entity and Generator Owner
Show answer & explanation

Correct answer: C - All involved Balancing Authorities and Transmission Service Providers

Question 4

What is the standard ramp duration for interchange transactions under normal conditions?

  1. 10 minutes
  2. 15 minutes
  3. 20 minutes
  4. 30 minutes
Show answer & explanation

Correct answer: C - 20 minutes

Question 5

A standard 20-minute ramp begins at what time relative to the top of the hour?

  1. At the top of the hour
  2. 10 minutes before the hour
  3. 10 minutes after the hour
  4. 15 minutes before the hour
Show answer & explanation

Correct answer: B - 10 minutes before the hour

Question 6

A Balancing Authority is scheduled to export 400 MW starting at 1400 with a standard 20-minute ramp. At 1405, how many MW should the BA be exporting?

  1. 100 MW
  2. 200 MW
  3. 300 MW
  4. 400 MW
Show answer & explanation

Correct answer: A - 100 MW

Question 7

What is the primary purpose of the pre-schedule checkout process?

  1. To verify generator availability
  2. To confirm that scheduled interchange values match between adjacent Balancing Authorities
  3. To calculate Area Control Error
  4. To approve transmission service requests
Show answer & explanation

Correct answer: B - To confirm that scheduled interchange values match between adjacent Balancing Authorities

Question 8

During pre-schedule checkout, adjacent Balancing Authorities discover a 50 MW discrepancy in their scheduled interchange values. What should be the immediate action?

  1. Use the higher value
  2. Use the lower value
  3. Investigate and resolve the discrepancy before the operating hour
  4. Split the difference and use the average
Show answer & explanation

Correct answer: C - Investigate and resolve the discrepancy before the operating hour

Question 9

Under what circumstances is an after-the-fact E-Tag permitted?

  1. For any transaction less than 100 MW
  2. When communication systems fail or for emergency energy transfers
  3. When the transaction duration is less than 15 minutes
  4. After-the-fact tags are never permitted
Show answer & explanation

Correct answer: B - When communication systems fail or for emergency energy transfers

Question 10

What is the difference between a dynamic schedule and a pseudo-tie?

  1. Dynamic schedules are for exports only; pseudo-ties are for imports only
  2. A pseudo-tie transfers the resource to another BA's ACE calculation; a dynamic schedule does not
  3. Dynamic schedules require Reliability Coordinator approval; pseudo-ties do not
  4. There is no difference; the terms are interchangeable
Show answer & explanation

Correct answer: B - A pseudo-tie transfers the resource to another BA's ACE calculation; a dynamic schedule does not

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