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22 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Which statement is true regarding bearings used in high-powered reciprocating aircraft engines? |
There is less rolling friction when ball bearings are used than when roller bearings are employed |
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A condition that can occur in radial engines but is unlikely to occur in horizontally opposed engines is |
Hydraulic lock |
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Which condition would be the least likely to be caused by failed or failing engines bearings? |
Low oil temperatures |
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Which is the principal advantage of using propeller reduction gears? |
To enable the engine RPM to be increased with an accompanying increase in power and allow the propeller to remain at a lower, more efficient RPM |
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Which of the following will decree volumetric efficiency in a reciprocating engine? 1. Full throttle operation. 2. Low cylinder head temperatures. 3. Improper valve timing. 4. Sharpe vends in the induction system. 5. High carburetor air temperatures |
3. Improper vale timing. 4. Sharpe vends in the induction system. 5. High carburetor air temperatures. |
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Which of the following is a characteristic of a thrust bearing used in most racial engines? |
Deep-groove ball |
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Which bearing is least lively to be a roller or ball bearing? |
Master rod bearing (radial engine). |
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The operating temperatures cake clearance of a radial engine as compared to a cold valve clearance is |
Greater |
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A nine-cylinder engine with a bite of 5.5 inches and a stoke of 6 inches will have a total piston displacement of |
1,283 Cubic inches |
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A five events of a four-stroke cycle engine in the order of their occurrence are |
Intake, compression, ignition, power, exhaust |
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The primary concern in establishing the firing order for an opposes engine is to |
Provided for balance and eliminate vibration to the greatest extent possible |
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If fuel/air ratio is proper and ignition timing is correct the combustion process should be completed |
Just after top center at the beginning if the lower stoke |
If f |
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Grinding the valves of a reciprocating engine to a feather edge is likely to result in |
Preignition and burned vales |
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Which statement is correct regarding engine crank-shaft? |
Moveable counterweights serve time reduce the torsional vibrations in an aircraft reciprocating engine |
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On which stokes are bit canes on a four-stoke cycle reciprocating aircraft engine open? |
Exhaust and intake |
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Master rod bearings are generally what type? |
Plain |
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The actually power delivered to the propeller of an aircraft engine is called |
Brake horsepower |
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Cam-ground pistons are installed in some aircraft engines to |
Provided a better fit at operating temperatures |
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Using the following info, determine how many degrees the crankshaft will rotate with both the intake and exhaust valves seated: Intake opens 15 degrees BTDC. Exhaust opens 70 degree BBDC. Intakes closes 45 degree ABDC. Exhaust closes 10 degree ATFC |
245 degree |
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Some aircraft engine manufacturers equip their products with chocked or taper-ground cylinders in order to |
Provide a straight cylinder bite at the operating temperatures |
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An aircraft reciprocating engine using hydraulic valve lifters is observed to gave no clearance in it valve operating mechanism after the minimum inlet oil and cylinder head temperatures for takeoff have been reached. When can this condition be expected? |
During normal operations |
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Which tool is generally used to measure the crank shaft rotation in degrees |
Dial indicator |
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