Is A safety feature usually employed in direct-cranking starters

when does the ignition event take place?

What likely effect would a cracked distributor rotor have on a magneto?

Sharp bends should be avoided in ignition leads primarily because

Using a cold spark plug in a high-compression aircraft engine would probably result in

The purpose of an under current relay in a starter-generator system is to

How does high-tension ignition shielding tend to reduce radio interference?

Ignition check during engine run-up indicates a slow drop in RPM. This is usually caused by

The secondary coil of a magneto is grounded through the

When installing a magneto on an engine, the

Which of the following will have the lowest RPM at any given engine speed?

A defective primary capacitor in a magneto is indicated by

When the ignition switch of a single (reciprocating)

The capacitor-type ignition system is used almost universally on turbine engines

What test instrument could be used to test an ignition harness for suspected leakage?

The greatest density of flux lines in the magnetic circuit of a rotating magnet-type magneto occurs when the magnet is in what position?

Failure of an engine to cease firing after turning the magneto switch off is an indication of

In a turbine engine dc capacitor discharge ignition system, where are the high-voltage pulses formed?

Ignition check during engine run-up indicates excessive RPM drop during operation on the right magneto.

When internally timing a magneto, the breaker points begin to open when the rotating magnet is

How is the strength of a magneto magnet checked?

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

What components make up the magnetic system of a magneto?

Magneto timing drift is caused by erosion of the breaker points and

What would be the result if a magneto breaker point mainspring did not have sufficient tension?

Magneto breaker point opening relative to the position of the rotating magnet and distributor rotor (internal timing) can be set most accurately

(1) The platinum and iridium ground electrodes used on fine wire spark plugs are extremely brittle and can be broken if they are improperly handled or adjusted. (2) When gapping massive-electrode spark plugs, a wire gauge should be inserted between the center and ground electrodes while moving the ground electrode in order to avoid setting the gap too close.

Magneto pole shoes are generally made of

What will be the result of using too hot a spark plug?

Hot spark plugs are generally used in aircraft powerplants

In an aircraft ignition system, one of the functions of the capacitor is to

Inspection of pneumatic starters by maintenance technicians usually includes checking the

If a spark plug lead becomes grounded, the

Which of the following statements regarding magneto switch circuits is NOT true?

The spark occurs at the spark plug when the ignition's

Spark plug fouling caused by lead deposits occurs most often

Generally, when removing a turbine engine igniter plug, in order to eliminate the possibility of the technician receiving a lethal shock, the ignition switch is turned off and

What is the electrical location of the primary capacitor in a high-tension magneto?

The numbers appearing on the ignition distributor block indicate the

When performing a magneto ground check on an engine, correct operation is indicated by

The type of ignition system used on most turbine aircraft engines is

If it is found that a shielded ignition system does not adequately reduce ignition noise, it may be necessary to install

In a typical starter-generator system, under which of the following starting circumstances may it be necessary to use the start stop button?

A spark plug is fouled when

When internally timing a magneto, the breaker points begin to open whenWhen internally timing a magneto, the breaker points begin to open when

The magnetic circuit of a magneto consists of a permanent multi-pole rotating magnet. The core is made of

What is the purpose of a safety gap in some magnetos?

What is the radial location of the two north poles of a four-pole rotating magnet in a high-tension magneto?

Magneto breaker points must be timed to open when the

What are two parts of a distributor in an aircraft engine ignition system? 1. Coil 2. Block 3. Stator 4. Rotor 5. Transformer

If an aircraft ignition switch is turned off and the engine continues to run normally, the trouble is probably caused by

When removing a shielded spark plug, which of the following is most likely to be damaged?

The constrained-gap igniter plug used in some gas turbine engines operates at a cooler temperature because

When does battery current flow through the primary circuit of a battery ignition coil?

How many secondary coils are required in a low-tension ignition system on an 18-cylinder engine?

Which of the following breaker point characteristics is associated with a faulty capacitor?

How are most radial engine spark plug wires connected to the distributor block?

What is the relationship between distributor and crankshaft speed of aircraft reciprocating engines?

In a low-tension ignition system, each spark plug requires an individual

The purpose of staggered ignition is to compensate for

Why are high-tension ignition cables frequently routed from the distributors to the spark plugs in flexible metallic conduits?

In a high-tension ignition system, a primary capacitor of too low a capacity will cause

As an aircraft engine's speed is increased, the voltage induced in the primary coil of the magneto

A spark plug's heat range is the result of

When using an electric starter motor, current usage

Why are turbine engine igniters less susceptible to fouling than reciprocating engine spark plugs?

Great caution should be exercised in handling damaged hermetically sealed turbine engine igniter transformer units because

Which of the following are included in a typical turbine engine ignition system? 1. Two igniter plugs. 2. Two transformers. 3. One exciter unit. 4. Two intermediate ignition leads. 5. Two low-tension igniter leads. 6. Two high-tension igniter leads.

A magneto ignition switch is connected

Spark plugs are considered worn out when the

When timing a magneto internally, the alignment of the timing marks indicates that the

Which of the following are distinct circuits of a high tension magneto?

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

What is a result of a ‘flashover' in a distributor?

Which statement is correct regarding the ignition system of a turbine engine?

When the switch is off in a battery ignition system, the primary circuit is

If staggered ignition timing is used, the

When a ‘Shower of Sparks' ignition system is activated at an engine start, a spark plug fires

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

When a magneto is operating, what is the probable cause for a shift in internal timing?

What will be the results of increasing the gap of the breaker points in a magneto?

What is the purpose of using an impulse coupling with a magneto?

How does the ignition system of a gas turbine engine differ from that of a reciprocating engine?

The E-gap angle is usually defined as the number of degrees between the neutral position of the rotating magnet and the position

In reference to a ‘Shower of Sparks' ignition system,

Spark plug heat range is determined by

The term ‘reach,' as applied to spark plug design and/or type, indicates the

When using an electric starter motor, the current flow through it

At what RPM is a reciprocating engine ignition switch check made?

In the aircraft magneto system, if the P-lead is disconnected, the magneto will be

Thermocouples are usually inserted or installed on the

Aircraft magneto housings are usually ventilated in order to

Air turbine starters are generally designed so that reduction gear distress or damage may be detected by

The primary advantage of pneumatic (air turbine) starters over comparable electric starters for turbine engines is

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

In the event a pneumatic start valve will not operate and the manual override must be used, the starter T-handle must be closed at scheduled starter drop out because

Why do turbine engine ignition systems require high energy?

What is the difference between a low-tension and a high-tension engine ignition system?

Capacitance after firing of a spark plug is caused by

Pneumatic starters are usually designed with what types of airflow impingement systems?