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!!!aBlock 14 HW 9

Homework 9 — 25 Questions

QuestionAnswer
1. When a "Shower of Sparks" ignition system is activated at engine start (recip engine); when does a spark plug fire? Only when both the Advance & Retard Breakers are closed As soon as the Retard breaker points open Only when both Advance & Retard breakers are open Only when both Advance & Retard breakers are open
2. Spark plugs come in different HEAT RANGES. Although we alway follow manufacturer's instruction, Cold rated spark plugs are usually used in low compression engines and Hot rated spark plugs are used in high compression engines. Is this statement True or False? True False False
3. Care must be taken when adjusting the gap on a fine wire spark plug as the iridium external electrodes are quite brittle.True or False? True False True
4. Why should sharp bends be avoided on reciprocate ignition leads? Ignition lead shielding effectiveness will be nullified Ignition leads are extremely brittle and may break Weak points may develop in the insulation / current leaks Weak points may develop in the insulation / current leaks
5. Which controller controls rate at which the turbocharger discharge pressure will increase? The Density controller The Rate-of-Change controller The Differential pressure controller The Rate-of-Change controller
6. How many different places can you source power to electrically start a gas turbine engine? 2 6 4 4
7. What is the purpose of a built-in resistor in an aviation spark plug? Help to increase the energy of the spark Help to reduce capacitance after-firing Help to reduce radio interference Help to reduce capacitance after-firing
8. The spark plug nearest the exhaust valve will fire first in what type of ignition system? Redundant ignition timing Staggered ignition timing Critical ignition timing Staggered ignition timing
9. What is the approx position of the rotating magnet in a high-tension magneto when the breaker points first close? E-Gap position A few degrees after full register position At the full register position At the full register position
10. Breaker points that have a frosty; sand blasted appearance are considered acceptable. True or False? True False True
11. Magneto breaker points adjustments relative to the position of the rotation magnet should be adjusted when? During internal timing or any time magneto is opened After installing magneto on the engine A&P's cannot adjust breaker points, must go for overhaul During internal timing or any time magneto is opened
12. How many turns of wire (approximately) are on the secondary coil of a high-tension magneto? 13.000 to 20,000 turns of heavy gauge wire 200 to 500 turns of fine gauge wire 13,000 to 20,000 turns of fine gauge wire 13,000 to 20,000 turns of fine gauge wire
13. What is used on a starter-generator installed on a gas turbine engine to disconnect power from the starter-generator and ignition once sufficient engine speeds are reached? A cut-out relay An under-current relay A reverse-flow relay An under-current relay
14. How does high-tension ignition shielding tend to reduce radio interference? Grounds high-frequency waves from magneto & leads By reducing the output intensity By preventing flashover Grounds high-frequency waves from magneto & leads
15. The application of carb heat during engine operation will have what effect? Increase the density of air in the cylinder Decrease the volume of air in the cylinder Decrease the weight of the fuel / air charge Decrease the weight of the fuel / air charge
16. Spark plugs are generally in 2 main categories. Name them. Fine Wire & Massive Electrode Massive Electrode & Massive Wire Fine Electrode & Massive Wire Fine Wire & Massive Electrode
17. What would result from a weak breaker point mainspring? A fire inside the magneto The points will weld closed The points will float or bounce The points will float or bounce
18. Spark plug fouling caused by lead deposits occurs most often when? When cylinder head temperatures are high When cylinder head temperatures are low During cruise or max continuous with rich mixtures When cylinder head temperatures are low
19. What is used on an aircraft to limit the amount of air that can flow from the turbocharger into the cabin for pressurization? An compressed air canister A sonic venturi A pressurization valve A sonic venturi
20. In the BOTH POSITION, the right and left magneto circuits are grounded. Is this True or False? True False False
21. If equipped, Thermocouple probes are usually installed in this location on aircraft reciprocating engines. Front Cylinder Rear Cylinder Hottest Cylinder of the engine Hottest Cylinder of the engine
22. How are Vortex Dissipator systems used on a TurboFan engine usually activated? A pressure relief valve A landing gear "Squat" or "Weight on Wheels" Switch Automatically A landing gear "Squat" or "Weight on Wheels" Switch
23. Heavy black soot found on spark plugs during inspection, sometimes accompanied by black smoke coming from the exhaust is usually the result of what? Worn oil seal rings Fuel mixture too lean Fuel mixture too rich Fuel mixture too rich
24. A slow drop (too slow) drop in engine RPM during a during a mag-drop / ignition test is usually caused by what? Incorrect ignition timing Incorrect valve adjustment Both of the above can be the cause of this Both of the above can be the cause of this
25. Routine inspection of a pneumatic starter used on a turbofan engine must include this. FOD inspection on the compressor Oil level and magnetic chip detector inspection Brush inspection Oil level and magnetic chip detector inspection
Created by: sampizzuto
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