Energy Audit MCQ [Free PDF] – 3 Objective Questions with Answers

Energy management begins by establishing where and how energy is used. Energy intensity normalizes energy use by useful output, such as kWh per unit of production. Key relation: Energy intensity=energy consumed/useful production output.

Exam focus: Normalize energy use before comparing production periods. Common trap: A detailed audit is not just a more detailed desk review; it includes measurements.

A preliminary/walk-through audit uses bills, production data and observations to identify major opportunities; a detailed audit adds instrumented measurements and engineering calculations. Energy intensity normalizes energy use by useful output, such as kWh per unit of production. Key relation: Energy intensity=energy consumed/useful production output.

Exam focus: Normalize energy use before comparing production periods. Common trap: A detailed audit is not just a more detailed desk review; it includes measurements.

Simple payback is easy and useful for first screening, but it is not a complete profitability measure. Discounted payback, NPV and IRR address time value more explicitly. Key relation: If annual savings are uniform: SPP = Initial investment / Annual net savings. Discounted methods use PV = CF_t/(1+r)^t.

Exam focus: Whenever a question says “simple payback”, immediately remember “no time value of money”. Common trap: Confusing simple payback with discounted payback or NPV.