Which condition defines a total power failure?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Prepare for the IC "A" School Test on Airflow, H2S, and Refrigerants. Utilize flashcards and multiple-choice questions with detailed hints and explanations to ensure success. Get exam-ready today!

Multiple Choice

Which condition defines a total power failure?

Explanation:
Total power failure happens when there’s no power source available to run the device. If the battery voltage is below the minimum threshold and there’s no AC input, the unit has no energy source to operate, so it cannot function. If AC input is present, power can come from the wall outlet even if the battery is low. If the battery is above the minimum and no AC input, the device can run on battery power. If both sources are available, the device operates normally. So the condition described—battery below 9.5 VDC with no AC input—is when you truly have a total power failure.

Total power failure happens when there’s no power source available to run the device. If the battery voltage is below the minimum threshold and there’s no AC input, the unit has no energy source to operate, so it cannot function. If AC input is present, power can come from the wall outlet even if the battery is low. If the battery is above the minimum and no AC input, the device can run on battery power. If both sources are available, the device operates normally. So the condition described—battery below 9.5 VDC with no AC input—is when you truly have a total power failure.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy