Aircraft Systems: Section 5

Detonation occurs because of

• lack of cylinder pressure

• low temperatures

• too much cylinder pressure

When an engine-driven fuel pump and electric auxiliary pump are _____, either pump could supply fuel to the engine.

• connected in series

• located above the fuel selector valve

• connected in parallel

• located below the fuel selector valve

All certificated aircraft are required to have a means of indicating to the pilot the quantity of fuel in ____

• each tank

• the tanks that are specifically listed on the fuel selector

• the tanks approved for takeoffs and landings

• the auxiliary tanks only

• the main tank only

Water is _____ than avgas.

• heavier

• lighter

• more volatile

• less dense

An auxiliary fuel pump could typically be used to purge _____ from the fuel system.

• vapor

• air

• small contaminants of rust and dirt

• oil

• water

Which example best describes a direct-reading fuel gauge type of system?

• a cork float with a wire sticking through a hole in the fuel tank cap

• a sender transmitter resistor mounted outside of the tank, operated by an arm connected to a float

• several probes across each tank from top to bottom

When a fuel is burned that has too little lead, common issues could include fouled spark plugs and valves sticking in their guides.

• True

• False

Which situation would be most likely to result in detonation?

• an engine that was designed to operate on 80-octane aviation gasoline, being supplied with 100-low lead gasoline

• an engine designed to operate on 80-grade gasoline, being supplied with grade-82UL

• an engine designed to operate on grade-100 gasoline, being supplied with grade-80

• an engine that has been modified per the Supplementary Type Certificate, being supplied with automobile gasoline

Which color of fuel was not mentioned in the textbook?

• green

• orange

• colorless

• purple

• blue

Colder fuel _____ than warmer fuel.

• has more mass and creates more power

• has less mass and creates more power

• has less mass and creates less power

• has more mass and creates less power