Preview Questions Substation Technician | Role Specific Skill

Question 1: What is typically the most critical factor to check when performing the "SF6 gas leakage" test on a circuit breaker?

Which action should you take?

Choose only one option

The presence of excess moisture in the gas

The operational current rating of the breaker

The quality of the sealing gaskets around the SF6 compartment

The total gas pressure within the system

Question 2: How do you ensure proper grounding of equipment in a substation to prevent electrical hazards?

Which action should you take?

Choose only one option

By relying solely on visual inspection without resistance measurements

By only checking the grounding system after a fault occurs

By measuring ground resistance, verifying proper conductor size, and ensuring connections are intact and corrosion-free

By assuming that the existing ground system is adequate

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: How do you ensure proper load balancing across transformers in a substation?

Which action should you take?

Choose only one option

By assuming all transformers have equal load and ignoring measurements

By measuring the load on each transformer, adjusting the tap changer settings, and balancing the load evenly

By focusing only on the overall system load without individual transformer checks

By excluding load balancing from routine maintenance checks

Question 5: What is the first step when diagnosing a fault in a circuit breaker that fails to close?

Which action should you take?

Choose only one option

Measure the arc interruption capacity of the breaker

Check the closing coil and associated control circuits

Inspect the breaker's mechanical linkages

Test the breaker's insulation resistance

Question 6: How do you ensure compliance with confined space entry regulations when working in substation vaults?

Which action should you take?

Choose only one option

By ignoring confined space entry protocols if there is no immediate risk

By assuming the space is safe based on past use

By ensuring proper ventilation, verifying that workers are trained, and following the entry permit system

By relying solely on ventilation and not monitoring the space conditions