Which statement is true about the number of generators on the aircraft?

Which statement is true about the number of generators on the aircraft?

• A. The engine-driven generators are more numerous than the auxiliary power unit generator.
• B. The auxiliary power unit generator is more numerous.
• C. They are equal in number.
• D. There are no engine-driven generators.

Answer: (A)

The key idea is how power is generated on the ERJ-145. It uses two engine-driven generators, one on each engine, plus one auxiliary power unit (APU) generator. That means there are two engine-driven generators and one APU generator, so engine-driven generators are more numerous. The APU generator provides power when needed (such as on the ground or when engines aren’t running), but it’s only a single unit, not multiple, so it can’t outnumber the engine-driven ones.

The key idea is how power is generated on the ERJ-145. It uses two engine-driven generators, one on each engine, plus one auxiliary power unit (APU) generator. That means there are two engine-driven generators and one APU generator, so engine-driven generators are more numerous. The APU generator provides power when needed (such as on the ground or when engines aren’t running), but it’s only a single unit, not multiple, so it can’t outnumber the engine-driven ones.