Regarding Energy Management and Audit, consider the following:1.A "Preliminary Audit" uses existing data to establish energy consumption patterns.2.A "Detailed Audit" involves the use of instruments to measure energy flow in specific equipment.3.The "Energy Intensity" of a product is the ratio of total energy consumed to the total units of production.Which of the statements given above is/are correct?

Correct Answer: C - 1, 2 and 3

Quick Concept Explanation

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.

Statement-wise Verification

• Statement 1 - Correct.
  A "Preliminary Audit" uses existing data to establish energy consumption patterns.
  A preliminary/walk-through audit uses bills, production data and observations to identify major opportunities
• Statement 2 - Correct.
  A "Detailed Audit" involves the use of instruments to measure energy flow in specific equipment.
  Normalize energy use before comparing production periods.
• Statement 3 - Correct.
  The "Energy Intensity" of a product is the ratio of total energy consumed to the total units of production.
  Energy intensity=energy consumed/useful production output.

Core Concept

Energy management begins by establishing where and how energy is used. 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.

Formula / Key Relationship

Energy intensity=energy consumed/useful production output.

Why the Other Options Are Wrong

Option A is incorrect because it omits correct statement(s) 3. Option B is incorrect because it omits correct statement(s) 1. Option D is incorrect because it omits correct statement(s) 2.

Exam Shortcut / Approach

Normalize energy use before comparing production periods.

Common Mistake

A detailed audit is not just a more detailed desk review; it includes measurements.

Quick Revision

Preliminary Detailed Audit and Energy Intensity is linked with Audit Types and Metrics, Energy Audit and Energy Management. Normalize energy use before comparing production periods.