Preview Questions Substation Technician | Role Specific Skill

Question 1: How do you measure the core loss in a transformer during testing?

Which action should you take?

Choose only one option

By monitoring the temperature rise in the transformer's core

By measuring the load current and voltage during operation

By checking the insulation resistance of the core

By applying voltage and measuring the no-load current and power factor to determine core losses

Question 2: In a substation, what is the main purpose of a disconnect switch?

Which action should you take?

Choose only one option

To control the flow of current in the power grid

To monitor voltage levels in real-time

To regulate the frequency of the electrical supply

To isolate parts of the circuit for maintenance or fault isolation

Question 3: What is the recommended action if a worker experiences electric shock while working in a substation?

Which action should you take?

Choose only one option

Perform a manual inspection of the equipment involved

Administer first aid and call emergency services immediately

Attempt to reset the electrical equipment

Continue work after ensuring the shock is minor

Question 4: What diagnostic test is used to detect a fault in the insulating material of a transformer?

Which action should you take?

Choose only one option

High-voltage withstand test

Insulation resistance test

Oil dielectric strength test

Impedance test

Question 5: What type of test is performed to assess the mechanical operation of a circuit breaker?

Which action should you take?

Choose only one option

SF6 leakage test

Contact resistance test

Insulation resistance test

Timing test

Question 6: How often should a transformer oil test be conducted to ensure proper functioning?

Which action should you take?

Choose only one option

Only when the transformer is first installed

After every maintenance procedure

At regular intervals, depending on the manufacturer's guidelines or operating conditions

Only during extreme weather events