Which option correctly pairs Normal Battery specifications?

Which option correctly pairs Normal Battery specifications?

• A. 24 VDC, 17 Ampere-Hours
• B. 24 VDC, 43 Ampere-Hours
• C. 28 VDC, 17 Ampere-Hours
• D. 12 VDC, 17 Ampere-Hours

Answer: (A)

Understanding aircraft electrical power needs starts with matching the battery’s voltage to the system it’s meant to serve and sizing its capacity to handle start and normal loads. The CRJ-550 operates on a 24-volt DC electrical system, so the Normal Battery is specified at 24 VDC. The capacity, about 17 ampere-hours, provides enough energy to power essential systems and start the engines without adding unnecessary weight. Choosing a different voltage isn’t correct for this aircraft’s main battery—28 VDC or 12 VDC don’t align with the CRJ-550’s electrical design. A much larger capacity, like 43 Ah, would be heavier and unnecessary for normal operation. In short, 24 VDC with 17 Ah matches the aircraft’s system requirements and optimal battery sizing.

Understanding aircraft electrical power needs starts with matching the battery’s voltage to the system it’s meant to serve and sizing its capacity to handle start and normal loads. The CRJ-550 operates on a 24-volt DC electrical system, so the Normal Battery is specified at 24 VDC. The capacity, about 17 ampere-hours, provides enough energy to power essential systems and start the engines without adding unnecessary weight.

Choosing a different voltage isn’t correct for this aircraft’s main battery—28 VDC or 12 VDC don’t align with the CRJ-550’s electrical design. A much larger capacity, like 43 Ah, would be heavier and unnecessary for normal operation. In short, 24 VDC with 17 Ah matches the aircraft’s system requirements and optimal battery sizing.