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!!!aBlock 14 HW 8

Homework 8 — 25 Questions

QuestionAnswer
1. Care must be taken when adjusting the gap in a "fine-wire" spark plug because. The spark plugs are very expensive The iridium wire used can be very brittle Fine-wire spark plugs are never used on reciprocating engines The iridium wire used can be very brittle
2. A high-tension magneto secondary coil is made up of. Approx 13,000 to 18,000 windings of thick copper wire Approx 13,000 to 18,000 windings of fine copper wire Approx 180 windings of thick copper wire Approx 13,000 to 18,000 windings of fine copper wire
3. In a high-tension ignition system, the current in the magneto secondary winding is. Induced when the primary coil is interrupted Induced when the contact points close Induced when the capacitor is full Induced when the primary coil is interrupted
4. The spark plugs belong to which circuit of a high-tension magneto? Primary Secondary Magnetic Secondary
5. What is the electrical location of the primary capacitor in a high-tension magneto? In series with the breaker points In parallel with the breaker points In parallel with secondary coil In parallel with the breaker points
6. A faulty spark plug (or several faulty spark plugs) would result in poor engine performance at what engine RPM? During start At high RPMs At all engine RPMs At all engine RPMs
7. How are high altitude aircraft magnetos pressurized? Magnetos are never pressurized By the compressed air of the turbocharger By a separate magneto air pump attached to engine gearbox By the compressed air of the turbocharger
8. When the switch is off in a battery ignition system, the primary circuit is. Grounded Opened Energized Opened
9. A high-tension magneto primary coil is made up of. Approx 13,000 to 18,000 windings of thick copper wire Approx 13,000 to 18,000 windings of fine copper wire Approx 180 windings of thick copper wire Approx 180 windings of thick copper wire
10. Magneto pole shoes are made from. Lamination of high grade hard iron Lamination of high grade soft iron Laminations of high grade aluminum Laminations of high grade soft iron
11. Which of the following will have the lowest RPM at any given engine speed? Engine crankshaft Magneto Distributors Engine Camshaft Magneto Distributors
12 Weak brush retention springs in a starter motor can result in. A fire hazard Higher than normal amperage draw Arcing between the brushes and the commutator Arcing between the brushes and the commutator
13. A "HOT" spark plug should be used in a high compression reciprocating engine. True or False? False True False
14. Why are gas turbine igniters less susceptible to fouling compared to spark plugs used in reciprocating engines? Gas turbine engines operate at cooler temperatures than reciprocating engines The high-intensity spark produced at the igniter plug tends the keep the plug clean during operation Gas turbine engine igniter plugs are more likely to foul compared to spark plugs used in reciprocating engines The high-intensity spark produced at the igniter plug tends the keep the plug clean during operation
15. In a low-tension magneto system, a spark strong enough to produce a spark at the spark plug is only possible due to. A high storage capacitor in the primary circuit A secondary coil located just before each spark plug A vibrator unit between the magneto and the spark plugs A secondary coil located just before each spark plug
16. When will the voltage in the secondary winding in a high-tension magneto be at its highest value? Immediately after the breaker points close Just prior to the spark plugs firing Immediately after the spark plug fires Just prior to the spark plugs firing
17. What would be the result if the spark plugs were gaped too wide? Hard starting and poor engine performance Wire harness damage Engine would run normally Hard starting and poor engine performance
18. A "frosty" (sandblasted) appearance on magneto breaker points is cause for replacement. True or False? False True False
19. If a spark plug is dropped onto a hard surface and no visible damage is noted, should the spark plug be replaced / rejected? Yes No Depends on the type of plug being used Yes
20. The amount of voltage generated in any high-tension magneto secondary coil is determined by the rate of collapse of the magnetic field around the primary coil and by the. The number of windings in the coil Amperage rating of the capacitor Strength of the aircraft battery The number of windings in the coil
21. When internally timing a magneto, the alignment of the timing marks indicate. Magnet is in full register position Magnet is in neutral position Magnet is in e-gap position Magnet is in e-gap position
22. The "Capacitor-Type" ignition system is used on most gas turbine engines because of its high-heat intensity and because of its. Long life High voltage output High amperage draw High voltage output
23. What will be the result of increasing the gap of the breaker points in a high tension magneto? Retard the spark and decrease its intensity Engine kickback during start Advance the spark and decrease its intensity Advance the spark and decrease its intensity
24. The "Reach" of a spark plug is described as the. Overall length of the spark plug The length of the threaded portion between the gasket seat and the end of the threaded portion inserted into the cylinder The term "Reach" is only used when discussing gas turbine igniter plugs The length of the threaded portion between the gasket seat and the end of the threaded portion inserted into the cylinder
25. When using a timing light to time a magneto to an engine, the magneto switch should be set to what position. Left or Right Both Off Both
Created by: sampizzuto
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