PP 05

Which will flow a greater amount of fuel for a given pressure in a Teledyne-Continental fuel injection system: B-size or C-size nozzles?. B-size. C-size. Both equal. Depends on mixture setting.

How often should injector nozzles in a fuel-injected engine be removed and cleaned?. Every 100 hours. Every 300 hours. Every 1200 hours. Every annual inspection only.

How should injector nozzles be cleaned?. Hot water. Soap and water. Acetone or lacquer thinner. Wire brush.

Where are the fuel injection nozzles located?. Inside the carburetor throat. Near each intake valve in the induction system. On the fuel pump outlet. Inside the cylinder head.

What is the purpose of a water injection system on an aircraft reciprocating engine?. It is a system to prevent carb ice. It is an anti-detonation system used at high power settings. It is used to cool cylinder heads at idle. It is used to increase fuel vaporization.

What type of ignition system is universally used in automobiles?. Magneto ignition. Dual ignition. Battery ignition. Induction ignition.

What type of ignition system is used on all certified aircraft engines?. Battery system. Magneto system. Low-tension battery system. Hybrid battery/magneto.

Some aircraft use both a magneto system and battery system. Which system is used for starting?. Magneto system only. Hybrid combined system. Battery system is used for starting. Neither, they are self-generating.

Does the spark in a battery ignition system occur when the breaker points open or close?. When the points close. When the points begin to open. When the magnet is neutral. When spark demand is high.

On a battery ignition circuit does spark occur when the primary circuit switch is open or closed?. Open. Closed. Depends on magneto timing. Only during cranking.

On a magneto ignition system does a spark occur when the switch in the primary circuit is open or closed?. Closed. Open. Neutral only. When breaker points are worn.

Does the spark in a magneto ignition system occur when the breaker points open or close?. When they close. When they begin to open. When at full register. Only at high RPM.

What are the two purposes of the capacitor across breaker points in a battery ignition system?. Lower spark energy and decrease voltage. Allow for more intense spark and reduce arcing at the points. Increase ignition timing and raise RPM. Reduce magneto drag and increase generator output.

What is the main reason low-tension ignition systems were developed for aircraft use?. To improve cruise economy. To eliminate spark plugs. For high altitude aircraft to prevent flashover in the distributor. For low altitude moisture protection.

What kind of coil is used inside a low-tension magneto?. Low tension coil only; high tension coil at each spark plug. High-tension coil only. Dual wound coil. Step-down coil.

How many high-tension coils are used in a six-cylinder aircraft engine using a low-tension ignition system?. 6. 12. 2. 1.

Why is shielding used on an engine equipped with high-tension magnetos?. To increase spark energy. To prevent radio interference. To reduce cylinder pressure. To minimize electrical load.

What kind of distributor is used for a low-tension magneto?. Copper vane. Carbon brush. Ceramic disk. Rotor cap with coil.

What is used to produce the magnetic field in a typical aircraft magneto?. A battery. Permanent magnets. Alternator coil. Inductor windings.

What is used to produce the magnetic field in a battery ignition system?. Permanent magnets. Mechanical rotation. The electricity supplied by the battery. A magnetized cam follower.

Are breaker points located in the primary or secondary circuit of a magneto?. Secondary circuit. Primary circuit. Both circuits. Distributor circuit.

Is the magneto switched On or Off when the switch is closed?. On — the system is grounded. Off — the system is grounded. Half-on. No effect.

What device is used for close adjustment in the timing of a base-mounted magneto?. Drive coupling. Vernier coupling. Magneto shim pack. Timing probe.

Of what material are permanent magnets made in most aircraft magnetos?. Stainless steel. Tungsten. Alnico (aluminum-nickel-cobalt). Ceramic alloy.

Of what material are the pole shoes and coil made in most aircraft magnetos?. Machined aluminum. Titanium alloy. Several laminated layers of high-grade soft iron. Hard carbon composite.

What is meant by the full register position of the magnet in a magneto?. Magnet is neutral. Magnet is between pole shoes. Magnets line up with the pole shoes. Magnets are disconnected.

What is meant by the neutral position of the magnet?. Magnets isolated from the field. Magnets located between pole shoes. Magnets grounded through the P-lead. Magnet is fully saturated.

Does the greatest change in magnetic flux occur at full register or neutral?. Full register. Just past neutral. Mid-range. End of rotation.

Does the field produced by primary current aid or oppose the magnetic flux of the rotating magnet?. Oppose. Aid. Neither. Alternates with RPM.

Which coil has more turns, the primary or secondary?. Primary (≈100× turns). Secondary (≈100× turns). They are equal. Depends on engine type.

What is the position of the rotating magnet when the breaker points close?. Full register. Just past neutral (E-gap). Maximum saturation. Minimum flux.

Do breaker points in a magneto open before or after the magnet passes neutral?. Before. After it passes neutral. At the same moment. When commanded by RPM.

What is used to reduce arcing between breaker points as they interrupt primary current?. Ballast resistor. Cooling fan. Capacitor. Insulated cam.

What are the two functions of the capacitor in a modern aircraft magneto?. Prevent power loss and reduce heat. Reduce arcing and produce a hotter spark. Control dwell time and timing advance. Increase magnetic strength and inductance.

Should the spark used for starting occur before or after the normal spark?. After. Before. Same time. No difference.