The Fuel System Flashcards
In a gravity-feed fuel system, the tanks must be ______ the engine to provide a head of fuel at the carburettor. Most modern aircraft have a ______ feed system.
above; pump
Fuel tanks (are / are not) vented to atmosphere. The fuel supply leaves the tank through a ______ thus there will (always / never) be some unusable fuel in the tanks.
are; stand-pipe; always
Fuel quantity indications are likely to be most accurate in the ______ ______ attitude. The gauge indications should (always / never need to be) cross-checked with other means.
level flight; always
A master fuel strain and drain point is likely to be situated at the (highest / lowest) point in the fuel system. This enables the system to be checked for and cleared of ______ if necessary.
lowest; foreign matter (or contamination)
For safety reasons, fuel selector valves are situated on the (same / opposite) side of the firewall to the engine.
opposite
The most common type of engine-driven fuel pump is the ______ -type. This type of pump delivers fuel to the carburettor or fuel control unit at (constant / varying) pressure depending on the setting of its ______ -relief valve.
vane; constant; pressure
Electric boost pump(s) are available for use if the engine-driven fuel pump pressure is low or the pump fails.
State two occasions when boost pumps are normally and routinely switched on.
Before starting and critical stages of flight e.g. takeoff, landing, low flying.
Priming fuel is normally pumped directly into the ______ ______ or at the head of one or more cylinders. It (does / does not) pass through the carburettor.
intake manifold; does not
A very cold engine will require (more I less) priming than normal. A hot engine may possibly require no priming at all (true / false).
.
After priming and starting, the engine runs roughly. What is the first thing to check?
.
The resistance of a fuel to detonation is represented by its rating or number. A fuel with a rating of 100 is (more f less) prone to detonation than one with a rating of 96.
.
Fuel with the same anti-detonation property as iso-octane is given an octane rating of
.
Avgas available in New Zealand has a performance number 100/130. The first number relates to the power available, before detonation, with a weak mixture. What does the second number refer to?
.
Avgas grade 100/130 is dyed as an aid to identification.
.
Spark plug fouling with lead deposits is more likely if the engine is operated for long periods at (high / low) power and (high I low) cylinder head temperatures.
.
The use of a lower grade of fuel than that recommended and approved for the engine, is
.
The use of MOGAS in an aircraft engine (requires / does not require) specific authorisation.
.
Aviation Turbine Fuel (AVTUR) is coloured or clear. It has the distinctive smell of .. AVTUR equipment decals have white lettering on a background. It must not be used in engines.
.
The most common contaminant of fuel is
.
You can minimise water condensation in the fuel tanks on cool nights by having the tanks (full empty).
.
If a fuel tank cap is left off, the fuel (may / will not) siphon out very rapidly in flight due to the (high / low) pressure over the wings.
.
Water is (more / less) dense than AVGAS and so will gather at the (top bottom) of the fuel tanks.
.
In a fuel drain check, water will appear as small globules at the (top I bottom) of the container. Other impurities will probably appear as a (darker / lighter) sediment.
.
A fuel drain check proves positive (i.e. shows water is present in the tanks). A second check also proves positive. What should you do next?
.
In general, fuel drain checks should be carried out, prior to the flight of the day, following each and any time may have occurred.
.
During refuelling, bonding clips between the fuelling equipment and aircraft should be secured (before / after) the tank caps are removed.
.
After refuelling, it is important that the documentation is completed.
.
A dipstick from one aircraft (may / may not) be used to accurately check the fuel contents of another.
.
If a fuel tank cap is left off, the fuel (may / will not) siphon out very rapidly in flight due to the (high / low) pressure over the wings.
.
Fuel management (is / is not) a high priority for a pilot.
.
