17 / 20

When are the auxiliary fuel pumps installed on single-engine low-wing aeroplanes typically used?

1. during take-off.
2. during cruise.
3. during landing.
4. in emergency situations.
5. in case of a suspected vapour lock.
6. in case of failure of the engine fuel pump.

  • A
    1, 3, 4 and 5.
  • B
    1, 2, 3, 4 and 5.
  • C
    1, 3, 4, 5 and 6.
  • D
    1, 2, 3, 4, 5 and 6.
Single engine piston aircraft feature additional fuel pumps called auxiliary pumps. Such pumps are not engine-driven but usually require electrical power. Auxiliary pumps are connected in parallel to the main fuel pumps and serve as a backup in case of failure of a main pump. They are required to be switched on in normal operation for take-off and landing only and are switched off in cruise. In abnormal conditions, such as a main pump failure or suspected vapour lock, or in any emergency situation, the auxiliary pumps are switched on.

Your Notes (not visible to others)



This question has appeared on the real examination, you can find the related countries below.