Energy Audit Types and Methodology Questions and Answers

Answer: C

Having found in a preliminary study that compressed air or steam accounts for a large share, the targeted audit examines that system alone in depth. It is the efficient sequel to a walk-through and avoids paying for depth where there is little to gain.

Answer: D

Correct answer: 1-Q, 2-R, 3-P

The three levels differ in how much measurement stands behind the numbers. A walk-through relies on inspection and existing records and gives indicative opportunities. A detailed audit measures the significant systems and quantifies their performance. An investment-grade audit adds an analysis of risk and uncertainty, because a lender is being asked to finance the savings and must know how firm they are.

Answer: A

Planning settles the scope, the instruments and the co-operation needed; the site work gathers the data; the analysis turns it into costed measures; and the report puts them before the people who can authorise them. Implementation and monitoring follow the report.

Answer: B

Correct answer: securing the commitment of senior management

Nothing else is worth starting without it. The auditor needs access, staff time, production data and the cooperation of departments with their own priorities, and the recommendations will need capital. All of that follows from a decision at the top, and an audit begun without it commonly produces a report that is read and shelved.

Answer: C

They are the one complete and independently verified record of what the site actually consumed and paid, and the seasonal shape often reveals as much as the total. Equipment-level efficiency and losses require measurement.

Answer: D

A 30 kW motor driving a load of 12 kW consumes nothing like its rating, and assuming otherwise overstates both the consumption and the saving from replacing it. The nameplate identifies the machine and bounds its capability; measurement establishes what it is doing.

Answer: A

Part loading, worn components, throttled valves and altered set points all shift a machine away from its design point, and only a measurement finds where it is. The Act does not prescribe what must be measured, which is left to the auditor's judgement.

Answer: B

Effort follows the money, so the systems drawing the bulk of the energy are examined first, together with any smaller one where the waste is known to be large. A big nameplate that runs for an hour a week is not significant.

Answer: C

Twenty per cent of the equipment commonly carries eighty per cent of the load, so measuring everything equally wastes the budget. Ranking the systems by consumption before choosing what to instrument is the practical application.

Answer: D

Inputs enter at one side, useful outputs and losses leave at the other, and the widths make the large losses immediately visible to a reader who will not follow a table. It is the single most effective illustration in most audit reports.