CPM Energy Management & Utilities 2

Question 1

What is 'demand response' in the context of industrial energy management?

Accepted Answer

Voluntarily reducing power consumption during peak grid periods in exchange for incentives

Answer

Demand response programs incentivize industrial customers to reduce or shift electricity use during peak grid periods, helping grid stability while lowering the plant's energy costs.

Question 2

Compressed air systems in manufacturing are noted for being energy-inefficient because:

Accepted Answer

Only 10–30% of electrical input energy is converted to useful pneumatic work

Answer

Compressed air is one of the most expensive plant utilities; only 10–30% of electrical input is converted to useful work, with the remainder lost as heat during compression.

Question 3

The primary advantage of a combined heat and power (CHP) system over separate heat and power generation is:

Accepted Answer

Overall system efficiency of 70–90% by utilizing waste heat from power generation

Answer

CHP achieves 70–90% overall efficiency by capturing and using heat that would otherwise be wasted, compared to the ~30–50% efficiency of conventional power generation alone.

Question 4

An energy balance analysis for a manufacturing process is primarily used to:

Accepted Answer

Identify all energy inputs, outputs, and losses to prioritize improvement opportunities

Answer

An energy balance maps all energy inputs against useful outputs and losses, applying conservation-of-energy principles to quantify waste and identify the highest-impact opportunities.

Question 5

Which lighting technology offers the best combination of energy efficiency and longest service life for industrial facilities?

Accepted Answer

LED (Light Emitting Diode) fixtures

Answer

LED fixtures deliver 50–80% energy savings versus HID or fluorescent lighting, with lifespans of 50,000–100,000 hours, reducing both energy and maintenance costs substantially.

(CPM) Certified Plant Manager Practice Test

(CPM) Certified Plant Manager Practice Test

CPM Energy Management & Utilities 2