Ignition starting system (2)

29問 • 1年前

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Capacitance after firing in most modern spark plugs is reduced by the

a built-in resistor in each plug.

A safety feature usually employed in pneumatic starters that is used if the clutch does not release from the engine drive at the proper time during start is the

drive shaft shear point.

The amount of voltage generated in any magneto secondary coil is determined by the number of windings and by the

rate of collapse of the magnetic field around the primary coil.

Airflow to the pneumatic starter from a ground unites normally prevented from causing starter overspeed during engine start by

activation of a flyweight cutout switch.

Which of the following, obtained during magneto check at 1,700 RPM. indicates a short (grounded) circuit between the right magneto primary and the ignition switch?

BOTH —1,700 RPM, R — 0RPM, L— 1,700 RPM, OFF— 0RPM.

What is the approximate position of the rotating magnet in a high-tension magneto when the points first close?

Full register.

Shielding is used on spark plug and ignition wires

prevent interference with radio reception.

Igniter plugs used in turbine engines are subjected to high intensity spark discharges and yet they have a long service life because they

do not require continuous operation.

Alignment 01 the marks provided or internal timing of a magneto indicates that the

magneto is in E-gap position.

If new breaker points are installed in a magneto on an engine, it will be necessary to time the

magneto internally and the magneto to the engine.

What component of a dual magneto is shared by both ignition systems?

Rotating magnet.

The spark is produced in a magneto ignition system when the breaker points are

beginning to open

When using a timing light to time a magneto to an aircraft engine, the magneto switch should be placed in the

BOTH position.

Defective spark plugs will cause the engine to run rough at

all speeds.

What will be the effect if the spark plugs are gapped too wide?

Hard starting.

When testing a magneto distributor block for electrical leakage. which of the following pieces of test equipment should be used?

A high-tension harness tester.

Which of the following would be cause for rejection of a spark plug?

Insulator tip cracked.

What should be used to clean grease or carbon tracks from capacitors or coils that are used in magnetos?

Acetone

A clicking sound heard at engine coast-down in a pneumatic starter incorporating a sprig clutch ratchet assembly is an indication of

the pawls re-contacting and riding on the ratchet gear.

Which of the following are advantages of dual ignition in aircraft engines? 1. Gives a more complete and quick combustion of the fuel. 2. Provides a backup magneto system. 3. Increases the output power of the engine. 4. Permits the use of lower grade fuels. 5. Increases the intensity of the spark at the spark plugs.

1,2,3

The electrical circuit from the magneto is completed by through the

engine structure.

If the ground wire of a magneto is disconnected at the ignition switch, the result will be the affected magneto will be isolated and the engine will run on the

engine will not stop running when me ignition switch is turn off.

Upon inspection of the spark plugs in an aircraft engine, the plugs were found caked with a heavy black soot. This indicates

a rich mixture.

In a high-tension ignition system, the current in the magneto secondary winding is

induced when the primary circuit is interrupted.

Thermocouples are usually inserted or installed on the

hottest cylinder of the engine.

In order to turn a magneto off, the primary circuit must be

grounded

Which of the following statements most accurately describes spark plug heat range?

A cold plug is designed so that the insulator tip is reasonably short to hasten the rate of heat transfer from the tip through the sparkplug shell to the cylinder head.

If a spark plug lead becomes grounded, the

magneto will not be affected.

When will the voltage in the secondary winding of a magneto, installed on a normally operating engine, be at its highest value?

Just prior to spark plug firing.

airlaw

ユーザ名非公開 · 119問 · 1年前

airlaw