Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Ignition&StartingSys
FAA AMP
| Question | Answer |
|---|---|
| Spark plug fouling caused by lead deposits occurs most often | When cylinder head temperatures are relatively low |
| Why do turbine engine ignition systems require high energy? | To ignite the fuel under conditions of high altitude and low temperatures |
| (Refer to Figure 5.) If wire 8 is broken or disconnected after starter rotation is initiated, and the power lever is advanced, the | Starting sequence will continue normally |
| What is the approximate position of the rotating magnet in a high-tension magneto when the points first close? | Full register |
| The purpose of an under current relay in a starter-generator system is to | Disconnect power from the starter-generator and ignition when sufficient engine speed is reached |
| How does high-tension ignition shielding tend to reduce radio interference? | Receives and grounds high-frequency waves coming from the magneto and high tension ignition leads |
| What will be the effect if the spark plugs are gapped too wide? | Hard starting |
| A magneto ignition switch is connected | Parallel to the breaker points |
| The E-gap angle is usually defined as the number of degrees between the neutral position of the rotating magnet and the position | Where the contact points open |
| As an aircraft engine's speed is increased, the voltage induced in the primary coil of the magneto | Increases |
| A spark plug is fouled when | It’s spark rounds without jumping electrodes |
| When a 'Shower of Sparks' ignition system is activated at an engine start, a spark plug fires | Only while both the retard and advance breaker points are open |
| Which of the following are included in a typical turbine engine ignition system? | Two igniter plugs, one excited unit, and two high-tension igniter leads |
| When using an electric starter motor, current usage | Is highest at the start of motor rotation |
| How many secondary coils are required in a low-tension ignition system on an 18-cylinder engine? | 36 |
| The spark is produced in a magneto ignition system when the breaker points are | Beginning to open |
| What is the purpose of a safety gap in some magnetos? | To discharge the secondary coil’s voltage if an open occurs in the secondary circuit |
| Great caution should be exercised in handling damaged hermetically sealed turbine engine igniter transformer units because | Some contain radioactive material |
| What will be the result of using too hot a spark plug? | Preignition |
| A safety feature usually employed in direct-cranking starters that is used to prevent the starter from reaching burst speed is the | Stator nozzle design that chokes airflow and stabilizes turbine wheel speed |
| What should be used to clean grease or carbon tracks from capacitors or coils that are used in magnetos? | Acetone |
| 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 i… | Only one is true |
| A clicking sound heard at engine coast-down in a pneumatic starter incorporating a sprag clutch ratchet assembly is an indication of | The pawls re-contacting and riding on the ratchet gear. |
| 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 | The igniter lead is disconnected from the plug and the center electrode grounded to the engine after disconnecting the transformer-excited input lead waiting the prescribed time |
| Which of the following breaker point characteristics is associated with a faulty capacitor? | Coarse grained |
| Air turbine starters are generally designed so that reduction gear distress or damage may be detected by | Inspection of a magnetic chip detetor |
| What is the purpose of using an impulse coupling with a magneto? | To produce a momentary high rotational speed of the magneto |
| Ignition check during engine runup indicates excessive RPM drop during operation on the right magneto. The major portion of the RPM loss occurs rapidly after switching to the right magneto position (fast drop). The most likely cause is | Faulty or fouled spark plugs |
| A spark plug's heat range is the result of | It’s ability to transfer heat from the firing end of the spark plug to the cylinder head |
| In an aircraft ignition system, one of the functions of the capacitor is to | Facilitate a more rapid collapse of the magnetic field in the primary coil |
| Refer to Figure 5.) With power applied to the bus bar, what switch changes will allow the ignition exciters test switch to function? | Engine masted switch and ignition switch |
| The spark occurs at the spark plug when the ignition's | Primary circuit is broke |
| 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 spark plug shell to the cylinder head |
| 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 |
| What would be the result if a magneto breaker point mainspring did not have sufficient tension? | The points will float or bounce |
| What are two parts of a distributor in an aircraft engine ignition system? | Block and rotor |
| What will be the result of increasing the gap of the breaker points in a magneto? | Advance the spark and decrease its intensity |
| Spark plugs are considered worn out when the | Electrodes have worn away about one half of their original dimensions |
| When the ignition switch of a single (reciprocating) engine aircraft is turned to the OFF position, | The primary circuits of both magnetos are grounded |
| The numbers appearing on the ignition distributor block indicate the | Sparking order of the distributor |
| Inspection of pneumatic starters by maintenance technicians usually includes checking the | Oil level and magnetic drain plug condition |
| The greatest density of flux lines in the magnetic circuit of a rotating magnet-type magneto occurs when the magnet is in what position? | Full alignment with the field shoe faces |
| In the aircraft magneto system, if the P-lead is disconnected, the magneto will be | On regardless of ignition switch position |
| 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 |
| Which statement is correct regarding the ignition system of a turbine engine? | The system is normally de-energized as soon as the engine starts |
| In a high-tension ignition system, the current in the magneto secondary winding is | Induced when the primary circuit is interrupted |
| (Refer to Figure 5.) Which malfunctions will allow the igniters to operate normally during start but be inoperative when tested? | Wire 14 or 15 is broken |
| Igniter plugs used in turbine engines have a long service life because they | Do not require continuous operation |
| The purpose of staggered ignition is to compensate for | Diluted fuel/air mixture around exhaust valve |
| What test instrument could be used to test an ignition harness for suspected leakage? | A high tension lead transfer |
| Shielding is used on spark plug and ignition wires to | Prevent interference with radio reception |
| If it is found that a shielded ignition system does not adequately reduce ignition noise, it may be necessary to install | A filter between the magneto and magneto switch |
| The term 'reach,' as applied to spark plug design and/or type, indicates the | Linear distance from the shell gasket seat to the end of the threads on the shell skirts |
| In a four-stroke cycle aircraft engine, when does the ignition event take place? | Before the piston reaches TD on compression stroke |
| Advantages of dual ignition in aircraft engines include providing a backup magneto system, increasing the output power of the engine, and | Increasing the output power of the engine |
| Defective spark plugs will cause the engine to run rough | At all speeds |
| How are most radial engine spark plug wires connected to the distributor block? | By use of cable-piercing screws |
| Hot spark plugs are generally used in aircraft powerplants | With comparatively low operating temperatures |
| How does the ignition system of a gas turbine engine differ from that of a reciprocating engine? | A high-energy spark is required for ignition |
| The secondary coil of a magneto is grounded through the | Primary coil |
| When using a timing light to time a magneto to an aircraft engine, the magneto switch should be placed in the | BOTH position |
| If a spark plug lead becomes grounded, the | Magneto will not be affected |
| Which of the following could cause damage to the nose ceramic or to the electrode of an aircraft spark plug? | Improper gapping procedure |
| What is the radial location of the two north poles of a four-pole rotating magnet in a high-tension magneto? | 180° apart |
| Capacitance afterfiring in most modern spark plugs is reduced by the use of | A built-in resistor in each plug |
| Magneto breaker point opening relative to the position of the rotating magnet and distributor rotor (internal timing) can be set most accurately | During assembly of the magneto before installation on the engine |
| When using an electric starter motor, the current flow through it | Is highest at the start of motor rotation |
| What likely effect would a cracked distributor rotor have on a magneto? | Ground the secondary circuit through the crack |
| In a low-tension ignition system, each spark plug requires an individual | Secondary coil |
| When timing a magneto internally, the alignment of the timing marks indicates that the | Magnets are in the E-gap position |
| The magnetic circuit of a magneto consists of a permanent multi-pole rotating magnet. The core is made of | Soft iron |
| Failure of an engine to cease firing after turning the magneto switch off is an indication of | An open P-lead to ground |
| Ignition check during engine runup indicates a slow drop in RPM. This is usually caused by | Incorrect ignition timing or valve adjustment |
| When performing a magneto ground check on an engine, correct operation is indicated by | A slight drop in RPM |
Created by:
cordon.gabriel
Popular Aviation sets