Powerplant FAA Question Bank with Complete Solutions (Rated A)

There is less rolling friction when ball bearings are used than when roller bearings are employed. - ANSWER-1. (8001) Which statement is true regarding bearings used in high-powered reciprocating aircraft engines? hydraulic lock. - ANSWER-2. (8002) A condition that can occur in radial engines but is unlikely to occur in horizontally opposed engines is Low oil temperatures. - ANSWER-3. (8003) Which condition would be the least likely to be caused by failed or failing engine bearings? 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. - ANSWER-4. (8004) What is the principal advantage of using propeller reduction gears? 3, 4, and 5. - ANSWER-5. (8005) Which of the following will decrease volumetric efficiency in a reciprocating engine? Deep-groove ball. - ANSWER-6. (8006) Which of the following is a characteristic of a thrust bearing used in most radial engines? Master rod bearing (radial engine). - ANSWER-7. (8007) Which bearing is least likely to be a roller or ball bearing? greater. - ANSWER-8. (8008) The operating temperature valve clearance of a radial engine as compared to cold valve clearance is 1,283 cubic inches. - ANSWER-9. (8009) A nine-cylinder engine with a bore of 5.5 inches and a stroke of 6 inches will have a total piston displacement of intake, compression, ignition, power, exhaust. - ANSWER-10. (8010) The five events of a four-stroke cycle engine in the order of their occurrence are provide for balance and eliminate vibration to the greatest extent possible. - ANSWER-11. (8011) The primary concern in establishing the firing order for an opposed engine is to just after top center at the beginning of the power stroke. - ANSWER-12. (8012) If fuel/air ratio is proper and ignition timing is correct, the combustion process should be completed preignition and burned valves. - ANSWER-13. (8013) Grinding the valves of a reciprocating engine to a feather edge is likely to result in Moveable counterweights serve to reduce the torsional vibrations in an aircraft reciprocating engine. - ANSWER-14. (8014) Which statement is correct regarding engine crankshafts? Exhaust and intake. - ANSWER-15. (8015) On which strokes are both valves on a four-stroke cycle reciprocating aircraft engine open? Plain. - ANSWER-16. (8016) Master rod bearings are generally what type? brake horsepower. - ANSWER-17. (8017) The actual power delivered to the propeller of an aircraft engine is called provide a better fit at operating temperatures. - ANSWER-18. (8018) Cam-ground pistons are installed in some aircraft engines to 245°. - ANSWER-19. (8019) Using the following information, determine how many degrees the crankshaft will rotate with both the intake and exhaust valves seated. provide a straight cylinder bore at operating temperatures. - ANSWER-20. (8020) Some aircraft engine manufacturers equip their product with choked or taper-ground cylinders in or