Energy and Utilities Electricity Generation and Distribution 3

Question 1

What is the primary fuel source for the largest share of US electricity generation as of recent years?

Accepted Answer

Natural gas

Answer

Natural gas has surpassed coal to become the leading fuel source for US electricity generation, accounting for roughly 40% of the total.

Question 2

What is 'islanding' in electrical grid terminology?

Accepted Answer

A section of the grid operating independently from the main grid

Answer

Islanding occurs when a portion of the grid continues to operate autonomously after becoming disconnected from the main grid.

Question 3

Which metric measures the ratio of actual electricity output to maximum possible output over a time period?

Accepted Answer

Capacity factor

Answer

Capacity factor is the ratio of actual electricity generated to the maximum that could have been produced at full capacity continuously.

Question 4

What is the purpose of reactive power in an AC power system?

Accepted Answer

To maintain voltage levels and support inductive/capacitive loads

Answer

Reactive power supports the magnetic and electric fields needed by motors, transformers, and capacitors to maintain system voltage stability.

Question 5

What does SCADA stand for in utility operations?

Accepted Answer

Supervisory Control and Data Acquisition

Answer

SCADA systems allow utility operators to remotely monitor and control grid equipment in real time.

Energy and Utilities Practice Test