Question

What is the purpose of the DC boost pump on APU startup?

A) To increase the voltage supplied to the APU
B) To provide additional power to the aircraft's lights
C) To assist in the pressurization of the cabin
D) To ensure a consistent fuel supply to the APU

Answer 1

The DC boost pump ensures a continuous fuel supply to the APU during startup, which is crucial for its effective operation.

Step-by-step explanation:

The purpose of the DC boost pump on APU startup is D) To ensure a consistent fuel supply to the APU. The Auxiliary Power Unit (APU) is a device on aircraft that provides energy for various functions when the main engines are not running, such as during startup or on the ground. The DC boost pump helps in delivering fuel from the aircraft's tanks to the APU, ensuring it has the fuel necessary to operate effectively. Without an adequate fuel supply, the APU might not start or could shut down unexpectedly, leading to potential operational delays and safety issues.