ECRE Practical Application

Question 1

A company wants to reduce its electricity bill by installing solar panels. What is the first step in implementing this solution?

Accepted Answer

Conducting an energy usage audit

Answer

Purchasing the largest available solar panels

Answer

Selecting a contractor to install the panels

Answer

Calculating the return on investment

Question 2

An industrial facility reduces its energy usage by replacing all halogen lights with LED lights. What metric should be calculated to determine energy savings?

Accepted Answer

Energy consumption in kilowatt-hours (kWh)

Answer

Light brightness in lumens

Answer

Cost of purchasing new bulbs

Answer

Average lifespan of the new lights

Question 3

In a wind energy system, a technician notices a drop in output power during high wind speeds. What is the likely issue?

Accepted Answer

Overspeed protection mechanism activating

Answer

Faulty generator connection

Answer

Insufficient wind turbine height

Answer

Incorrect blade angle adjustment

Question 4

An engineer is tasked with improving a building's energy efficiency. Which of the following changes will have the most immediate impact?

Accepted Answer

Sealing air leaks around doors and windows

Answer

Installing double-glazed windows

Answer

Replacing old insulation in walls

Answer

Retrofitting HVAC systems with modern technology

Question 5

A renewable energy company wants to estimate the annual energy production of a solar farm. Which data is most critical for this calculation?

Accepted Answer

Average daily sunlight hours in the location

Answer

Number of solar panels installed

Answer

Total land area of the solar farm

Answer

Cost of panel maintenance