Fuel

Question 1

Vapour lock is?

Answer 1

A blockage in a fuel feed line caused by a fuel vapour bubble.

Question 2

The conditions which can cause detonation in a piston engine related to manifold and pressure and RPM are?

Answer 2

High manifold pressure and low rpm

Question 3

A piston engine may use a fuel of a different grade than the recommended when?

Answer 3

the the fuel grade is higher

Question 4

The octane rating of a fuel indicates its?

Answer 4

resistance to detonation

Question 5

What should the pilot do if a piston engine aircraft experiences detonation during climb-out?

Answer 5

Decrease manifold pressure.

Question 6

To prevent vapour locking, which can lead to fuel starvation, a common type of limitation imposed by the Minimum Equipment List (MEL) in large transport aeroplanes for complete boost pump failure is?

Answer 6

Maximum operating altitude limitation.

Question 7

If detonation occurs in a normally aspirated piston engine during climb-out, the normal corrective action is to?

Answer 7

Retard the throttle

Question 8

Consider a piston-engined aircraft. In what case is a separate engine-driven fuel pump always required?

Answer 8

To supply positive fuel pressure to a fuel injection system.

Question 9

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

Answer 9

1. During Take-Off
2. During Landing
3. In Emergency Situations
4. In case of a suspected vapour lock
5. In case of failure of the engine fuel pump