Preview Questions Substation Technician | Role Specific Skill

Question 1: What would indicate a fault in the protection settings of a transformer?

Which action should you take?

Choose only one option

High oil pressure in the transformer

Transformer operates normally, but trips during normal loading

Transformer continues to run at higher than rated temperatures

Protection relay trips intermittently without cause

Question 2: How do you perform an oil test to check for moisture content in a transformer?

Which action should you take?

Choose only one option

By visually inspecting the oil for discoloration

By ignoring moisture testing and focusing only on oil level checks

By using a moisture testing device or sampling the oil and sending it to a laboratory for analysis

By assuming that oil does not need to be tested unless there is a fault

Question 3: What is the minimum safe distance from a high-voltage transmission line that workers should maintain?

Which action should you take?

Choose only one option

15 feet

25 feet

10 feet

3 feet

Question 4: What is the purpose of remote control testing for circuit breakers in a substation?

Which action should you take?

Choose only one option

To measure the temperature of the breaker's casing

To monitor the current passing through the breaker during operation

To verify that the breaker can be operated remotely without failure or delay

To check the mechanical alignment of the breaker

Question 5: What would you do if a current transformer (CT) shows a significant difference in the secondary current compared to the primary current?

Which action should you take?

Choose only one option

By testing the CT's ratio, checking for loose connections, and verifying the integrity of the insulation

By replacing the CT without conducting any tests

By measuring the primary current only and ignoring the secondary

By assuming the CT is faulty without further investigation

Question 6: What is the common cause of a circuit breaker failing to clear a fault condition?

Which action should you take?

Choose only one option

Short-circuit in the control wiring

Inaccurate calibration of the fault detection relay

Fault in the breaker's arc-quenching medium

Insufficient oil level in the breaker mechanism