Which of the following instruments are correctly matched with their use in an Energy Audit?1.Lux Meter: Measuring illumination levels.2.Ultrasonic Flow Meter: Measuring liquid flow in pipes without cutting them.3.Combustion Analyzer: Measuring the power factor of electric motors.Select the correct answer:
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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.
Formula / Key Relation
Energy intensity=energy consumed/useful production output.
Detailed Explanation
Correct Answer: A - 1 and 2 only Quick Concept Explanation 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. Statement-wise Verification Statement 1 - Correct.Lux Meter: Measuring illumination levels.Normalize energy use before comparing production periods. Statement 2 - Correct.Ultrasonic Flow Meter: Measuring liquid flow in pipes without cutting them.Normalize energy use…
Correct Answer: A - 1 and 2 only
Quick Concept Explanation
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.
Statement-wise Verification
Statement 1 - Correct. Lux Meter: Measuring illumination levels. Normalize energy use before comparing production periods.
Statement 2 - Correct. Ultrasonic Flow Meter: Measuring liquid flow in pipes without cutting them. Normalize energy use before comparing production periods.
Statement 3 - Incorrect. Combustion Analyzer: Measuring the power factor of electric motors. A combustion analyzer measures flue-gas parameters such as O2/CO/CO2 and combustion efficiency, not motor power factor
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 B is incorrect because it includes incorrect statement(s) 3 and omits correct statement(s) 1. Option C is incorrect because it includes incorrect statement(s) 3 and omits correct statement(s) 2. Option D is incorrect because it includes incorrect statement(s) 3.
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
Lux Meter Ultrasonic Flow Meter and Combustion Analyzer is linked with Audit Instruments, Energy Audit and Energy Management. Normalize energy use before comparing production periods.
Quick Trick
Normalize energy use before comparing production periods.
Why Other Options Are Wrong
Option B is incorrect because it includes incorrect statement(s) 3 and omits correct statement(s) 1. Option C is incorrect because it includes incorrect statement(s) 3 and omits correct statement(s) 2. Option D is incorrect because it includes incorrect statement(s) 3.
Common Mistake
A detailed audit is not just a more detailed desk review; it includes measurements.
Exam Tip
Normalize energy use before comparing production periods.
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