Powerplant FAA Question Bank with correct answers

There is less rolling friction when ball bearings are used than when roller bearings are employed. CORRECT ANSWER 1. (8001) Which statement is true regarding bearings used in high-powered reciprocating aircraft engines? hydraulic lock. CORRECT ANSWER 2. (8002) A condition that can occur in radial engines but is unlikely to occur in horizontally opposed engines is Low oil temperatures. CORRECT 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. CORRECT ANSWER 4. (8004) What is the principal advantage of using propeller reduction gears? 3, 4, and 5. CORRECT ANSWER 5. (8005) Which of the following will decrease volumetric efficiency in a reciprocating engine? Deep-groove ball. CORRECT ANSWER 6. (8006) Which of the following is a characteristic of a thrust bearing used in most radial engines? Master rod bearing (radial engine). CORRECT ANSWER 7. (8007) Which bearing is least likely to be a roller or ball bearing? greater. CORRECT ANSWER 8. (8008) The operating temperature valve clearance of a radial engine as compared to cold valve cle