Preview Questions Substation Technician | Role Specific Skill

Question 1: How do you test the mechanical operation of a circuit breaker during routine maintenance?

Which action should you take?

Choose only one option

By testing the breaker only under fault conditions

By observing the breaker's external operation without testing

By manually operating the breaker and checking its response time, movement, and proper alignment

By focusing only on the electrical components and ignoring mechanical parts

Question 2: What is the purpose of DC battery testing in a substation?

Which action should you take?

Choose only one option

To ensure the battery is capable of providing backup power during outages

To monitor the load current across the entire substation

To check the insulation resistance of the battery

To measure the battery voltage under load

Question 3: What is the main purpose of a "pre-job safety briefing" in substation operations?

Which action should you take?

Choose only one option

To finalize the design of the work area

To discuss equipment specifications and configurations

To ensure all workers are aware of hazards and safe practices

To review the project schedule and deadlines

Question 4: What is the primary reason for performing a turn-to-turn insulation resistance test on a transformer?

Which action should you take?

Choose only one option

To detect possible short circuits between windings

To check for external physical damage to the transformer

To ensure proper oil flow within the transformer

To assess the overall efficiency of the transformer's core

Question 5: How do you diagnose a short circuit in a busbar system of a substation?

Which action should you take?

Choose only one option

Inspect the busbar for physical damage

Check the voltage drop across the busbar

Measure the current flowing through the busbar and compare it with the rated current

Measure the temperature across the busbar joints

Question 6: How can temperature monitoring of a transformer assist in its maintenance?

Which action should you take?

Choose only one option

By providing insights into the aging process of the transformer

By optimizing the transformer's operational efficiency

By detecting excessive heat caused by short circuits or overloads

By preventing the transformer's oil from overheating