Preview Questions Substation Technician | Role Specific Skill

Question 1: How do you ensure the accuracy of the circuit breaker's tripping characteristics during maintenance?

Which action should you take?

Choose only one option

By performing a timed overcurrent test, verifying the trip settings against the manufacturer's specifications

By relying on visual inspections and ignoring test results

By measuring only the breaker's physical condition

By assuming the breaker will trip accurately based on previous settings

Question 2: What steps do you take to ensure that a substation meets fire safety compliance requirements?

Which action should you take?

Choose only one option

By relying solely on fire extinguishers and assuming compliance

By conducting a single inspection and assuming long-term compliance

By ensuring fire detection and suppression systems are in place, performing regular drills, and inspecting for fire hazards

By focusing only on electrical faults and ignoring fire safety

Question 3: What does an abnormal arc flash at the circuit breaker indicate?

Which action should you take?

Choose only one option

High humidity or moisture affecting the breaker insulation

Overcurrent conditions that the breaker cannot handle

A failure in the breaker's interrupting mechanism or misalignment of contacts

Faulty current transformers causing incorrect trip signals

Question 4: In a circuit breaker, what does the "measuring contact resistance" test primarily assess?

Which action should you take?

Choose only one option

The mechanical wear of the operating mechanism

The health of the breaker contacts under load

The resistance across the open contacts

The breaker's ability to withstand surge currents

Question 5: What is the primary purpose of a busbar in an electrical substation?

Which action should you take?

Choose only one option

To connect multiple circuits and provide fault isolation

To provide a secure ground path for the electrical system

To regulate voltage across all circuits

To act as a protective relay for the transformer

Question 6: How do you handle a situation where an electrical fault in a substation could cause a fire hazard?

Which action should you take?

Choose only one option

By activating fire suppression systems, de-energizing the affected equipment, and following the emergency response plan

By focusing only on restoring power and ignoring fire risks

By assuming that the risk of fire is minimal unless there is visible smoke

By waiting for the fire to be controlled and then addressing the fault