BGE Energy Generation & Distribution

Question 1

Which energy source is most commonly used for electricity generation in the United States?

Accepted Answer

Natural gas

Answer

In the United States, natural gas has become the predominant fuel source for electricity generation due to its abundance, lower emissions compared to coal, and the development of efficient combined-cycle power plants. While other sources like nuclear and renewables are growing, natural gas currently accounts for the largest share of the nation's electricity production.

Question 2

What is the main function of a substation in an electrical distribution system?

Accepted Answer

Convert high voltage to lower voltage

Answer

The main function of a substation in an electrical distribution system is to transform high-voltage electricity from transmission lines into lower voltages suitable for local distribution. Transformers within the substation step down the voltage, making it safe and practical for delivery to homes and businesses through the local grid. This conversion is crucial for efficient and safe power delivery.

Question 3

Which factor affects the efficiency of electricity transmission?

Accepted Answer

Using higher voltage transmission lines

Answer

The efficiency of electricity transmission is significantly improved by using higher voltage transmission lines. Transmitting electricity at higher voltages reduces current, which in turn minimizes energy loss due to resistance (I²R losses) along the power lines. This allows electricity to travel longer distances with less waste, making the grid more efficient.

Question 4

What role do transformers play in electricity distribution?

Accepted Answer

Increase or decrease voltage levels

Answer

Transformers are essential components in electricity distribution systems, primarily responsible for changing voltage levels. Step-up transformers increase voltage for efficient long-distance transmission, while step-down transformers decrease voltage for safe distribution to homes and businesses. This ability to adjust voltage is critical for the effective and safe delivery of electricity across the grid.

Question 5

Which component of the power grid is responsible for delivering electricity to end users?

Accepted Answer

Distribution network

Answer

The distribution network is the final stage of the power grid responsible for delivering electricity directly to end users, such as homes, businesses, and industrial facilities. It consists of lower-voltage power lines, transformers, and local substations that branch out from the main transmission system. This network ensures that electricity is safely and reliably supplied to consumers.

(BGE) Baltimore Gas and Electric Practice Test

(BGE) Baltimore Gas and Electric Practice Test

BGE Energy Generation & Distribution