EEI TECH EEI Tech Electrical Concepts 3

Question 1

What is the purpose of electrical grounding in a utility system?

Accepted Answer

Provide a safe path for fault current

Answer

Grounding provides a low-resistance path for fault current to flow safely to earth, protecting equipment and personnel.

Question 2

Which device is used to measure current in a live circuit without disconnecting wires?

Accepted Answer

Clamp meter (clamp-on ammeter)

Answer

A clamp meter measures current by clamping around a conductor without breaking the circuit.

Question 3

What does 'GFCI' stand for in electrical work?

Accepted Answer

Ground Fault Circuit Interrupter

Answer

GFCI stands for Ground Fault Circuit Interrupter, a safety device that interrupts circuits on detecting small ground faults.

Question 4

In AC power systems, what does 'power factor' measure?

Accepted Answer

Efficiency of real power use vs. apparent power

Answer

Power factor is the ratio of real power (watts) to apparent power (VA), indicating how efficiently power is used.

Question 5

What is the purpose of a neutral conductor in a standard 120V circuit?

Accepted Answer

Provide a return path for current to the source

Answer

The neutral conductor completes the circuit by carrying return current back to the power source.

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