What powers the critical load when the DC bus power is lost?

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 $24.99Unlock all

Prepare with flashcards and multiple choice questions for the ATR General Familiarization Test. Gain insights into various aircraft systems, hints, and explanations for a successful exam experience. Get ready to excel!

Multiple Choice

What powers the critical load when the DC bus power is lost?

Explanation:
The critical load is powered by the main and emergency batteries. When the DC bus loses power, the aircraft’s backup power system kicks in, using the main battery to support essential buses and the emergency battery to guarantee continued power to the most critical loads for a minimum duration. This ensures essential instruments, flight controls, and communications stay powered until normal power is restored. The other options are not power sources: a spring tab is a mechanical component, a battery thermal switch is a protection device, and probes and sensors require power but do not supply it themselves.

The critical load is powered by the main and emergency batteries. When the DC bus loses power, the aircraft’s backup power system kicks in, using the main battery to support essential buses and the emergency battery to guarantee continued power to the most critical loads for a minimum duration. This ensures essential instruments, flight controls, and communications stay powered until normal power is restored. The other options are not power sources: a spring tab is a mechanical component, a battery thermal switch is a protection device, and probes and sensors require power but do not supply it themselves.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy