Module 3 — Energy and Reliability

Module quiz

5 questions on Module 3 — Energy and Reliability. Answer them all, then check your score before moving on. 4 correct or more is a pass. Your best score is saved on this device, and to your account when you are signed in. This is a self-check, not an accredited assessment.

1. 1. Why is energy reported per garment rather than as a monthly total?

   To make the number look smallerBecause output changes month to month — only energy per unit shows whether efficiency actually improvedBecause bills are monthlyBuyers require that format

2. 2. Before investing in a new efficient compressor, what should the factory do first?

   Order the compressor — savings are obviousMeter the loads and fix leaks and pressure settings, so the real demand — and the real saving — is knownBuy a bigger compressor than neededAsk the supplier for a discount

3. 3. What does improving the factory's power factor achieve?

   It reduces the energy consumed by machinesIt reduces the reactive current drawn from the grid, cutting utility penalties and freeing system capacityIt makes motors run fasterIt eliminates the need for maintenance

4. 4. During a grid outage the factory runs a diesel generator. What must the switching arrangement guarantee?

   That the generator runs as quietly as possibleThat the generator can never feed back into the public grid — a locked or interlocked changeover protects line workersThat all machines start at onceThat fuel is stored inside the sewing hall

5. 5. Which efficiency action usually has the shortest payback?

   Replacing the entire factory roof with solarFixing compressed-air leaks and switching off idle equipment outside production hoursBuying a new generatorRepainting the factory