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!!!&!Block 16 - HW-7
HW-7
| Question | Answer |
|---|---|
| 1. How is anti-icing fluid ejected from the slinger ring on a propeller? – a. By pump pressure. – b. By centrifugal force. – c. By centripetal force. | b. By centrifugal force. |
| 2. What is the purpose of the Distributor Valve of a Hamilton Standard Hydromatic propeller? -- a. It is an extension of the engine drive shaft and provides oil passage to the front side of the propeller piston for pitch change b. It is an extension of the engine drive shaft and provides oil passage to the front side of the propeller for lubrication only c. It is an extension of the engine drive shaft to prevent over travel of the propeller piston | a. It is an extension of the engine drive shaft and provides oil passage to the front side of the propeller piston for pitch change |
| 3. What controls the constant-speed range of a constant-speed propeller? -- a. Angle of climb and descent with accompanying changes in airspeed. – b. Engine RPM. – c. The mechanical limits in the propeller pitch range. | c. The mechanical limits in the propeller pitch range. |
| 4. On most reciprocating multiengine aircraft, automatic propeller synchronization is accomplished through the actuation of the – a. propeller control levers. – b. throttle levers. – c. propeller governors. | c. propeller governors. |
| 5. What would repair to composite blades require? – a. FAR part 135 – b. Certified Propeller Repair Station – c. Mechanic with a powerplant rating | b. Certified Propeller Repair Station |
| 6. What should be done if a propeller is subjected to salt water? – a. Flush with fresh water until all traces of salt have been removed – b. No further action is required due to advanced designs – c. Remove and inspect propeller for corrosion within 10 flight hours | a. Flush with fresh water until all traces of salt have been removed |
| 7. What is done to make the location of cracks more readily apparent in more readily apparent in some models of McCauley propeller hubs? – a. The area is left bare to provide for visual inspections at all times – b. The hub is permanently sealed and partially filled with dyed oils – c. Pressure surges are dampened with the use of specified oils | b. The hub is permanently sealed and partially filled with dyed oils |
| 8. What is the purpose of an arbor used in balancing a propeller? – a. To mark the propeller blades where weights are to be attached. – b. To support the propeller on the balance knives. – c. To level the balance stand. | b. To support the propeller on the balance knives. |
| 9. Which of the following is identified as the cambered or curved side of a propeller blade, • corresponding to the upper surface of a wing airfoil section? – a. Blade back. – b. Blade chord. – c. Blade face. | a. Blade back. |
| 10. Which system includes a supply tank, pump, stationary nozzle, and U-shaped channel also known as a slinger ring? – a. Propeller anti-icing system – b. Propeller anti-torque system – c. Propeller de-icing system | a. Propeller anti-icing system |
| 11. A speed-sensing device that causes the propeller to maintain a set RPM regardless of the aircraft attitude is known as a: – a. counterweight assembly – b. hub assembly – c. governor | c. governor |
| 12. Propeller blade angle is the angle between the – a. chord of the blade and the rotational plane of the propeller. – b. chord of the blade and the relative wind. – c. relative wind and the rotational plane of the propeller. | a. chord of the blade and the rotational plane of the propeller. |
| 13. What is the minimum Taper Shaft to the Propeller Mounting surface contact – a. 70% minimum contact – b. 50% total contact – c. 95% minimum contact | a. 70% minimum contact |
| 14. How is the blade angle chosen for a fixed-pitch wooden propeller? – a. Maximum thrust production capabilities – b. Maximum efficiency during level flight – c. The most cost effective choice | b. Maximum efficiency during level flight |
| 15. Propeller blade tracking is the process of determining – a. the positions of the tips of the propeller blades relative to each other. – b. that the blade angles are within the specified tolerance of each other. – c. the plane of rotation of the propeller with respect to the aircraft longitudinal axis. | a. the positions of the tips of the propeller blades relative to each other. |
| 16. The centrifugal twisting force acting on a propeller blade is – a. greater than the aerodynamic twisting force and tends to move the blade to a lower angle. – b. less than the aerodynamic twisting force and tends to move the blade to a lower angle. c. greater than the aerodynamic twisting force and tends to move the blade to a higher angle. | a. greater than the aerodynamic twisting force and tends to move the blade to a lower angle |
| 17. What actuates the pilot valve in the governor of a constant-speed propeller? – a. Engine oil pressure. – b. Governor flyweights. – c. Governor pump oil pressure. | b. Governor flyweights |
| 18. How are composite blades inspected for defects --a. Visually -- b. Dye Penetrant – c. Coin tap | c. Coin tap |
| 19. Where are the high and low pitch stops of a Hamilton Standard constant-speed or two-position counterweight propeller located? – a. In the hub and blade assembly. – b. In the counterweight assembly. – c. In the dome assembly. | a. In the hub and blade assembly. |
| 20. What are the two oil pressures used to maintain and change blade angle in a Hamilton-Standard Hydromatic propeller hub? – a. Internal propeller air pressure and engine oil pressure – b. governor oil pressure and engine oil pressure – c. governor oil pressure and governor relief valve pressure | b. governor oil pressure and engine oil pressure |
| 21. The holding coil on a hydromatic propeller feathering bottom switch holds a solenoid relay closed that applies power to the propeller – a. Governor – b. Feathering pump motor – c. Dome feathering mechanism – d. Rheostat | b. Feathering pump motor |
| 22. The Angle of Attack is defined as the difference of the blade chord line and the relative wind. What two elements make up (define) relative wind? – a. propeller blade angle and propeller RPM – b. aircraft velocity and propeller speed – c. aircraft velocity and propeller blade angle | b. aircraft velocity and propeller speed |
| 23. On some reciprocating multiengine aircraft, propeller synchronization is accomplished – a. by manually adjusting the engine mixture – b. by manually adjusting the engine throttles during cruise – c. automatically through the propeller governors | c. automatically through the propeller governors |
| 24. What would the installation of a propeller governor or feathering system be considered? – a. Major alteration – b. Maintenance – c. Minor repair | a. Major alteration |
| 25. Anodizing is a common surface treatment of what kind of metal? – a. Steel – b. Aluminum alloys – c. Titanium | b. Aluminum alloys |
| 26. Regarding a Hartzell Compact feathering propeller, the purpose of the air charge in the cylinder is to – a. act as an un feathering accumulator – b. act as a buffer to absorb quick piston movements – c. act as an accumulator to assist in feathering the propeller | a. act as an un feathering accumulator |
| 27. When the angle of attack is too low (less the 2 degrees) the propeller will – a. rotate in the reverse direction – b. stop rotating completely – c. windmill or drive the engine | c. windmill or drive the engine |
| 28. What reference points are measured from the hub centerline? – a. Propeller blade stations – b. Propeller pitch stations – c. Waterline numbers | a. Propeller blade stations |
| 29. What controls the constant speed range of a constant speed propeller? – a. Angle of climb and decent with accompanying changes in airspeed – b. Engine RPM – c. The mechanical limits in the propeller pitch ranges | c. The mechanical limits in the propeller pitch ranges |
| 30. What will happen to the propeller blade angle and the engine RPM if the tension on the propeller governor control spring (speeder spring) is increased? – a. Blade angle will increase and RPM will decrease. – b. Blade angle will decrease and RPM will increase. – c. Blade angle will decrease and RPM will decrease.s | b. Blade angle will decrease and RPM will increase. |
| 31. Torque created by the engine will – a. cause the propeller blades to lag in the opposite direction of rotation – b. cause vibration of the propeller blades – c. cause the propeller blade to lead in the direction of flights | a. cause the propeller blades to lag in the opposite direction of rotation |
| 32. Some defects to look for during a inspection of a wood propeller: – a. Grease deposits – b. Stress concentration – c. Screws for tightness – d. Cracks, dents and warpages | d. Cracks, dents and warpages |
| 33. What unit in the propeller anti-icing system controls the output of the pump? – a. Cycling timer – b. Rheostat – c. Pressure relief valve – d. Brush blocks | b. Rheostat |
| 34. How does the propeller governor decrease blade angle and permits the engine to return to the on-speed setting? – a. By allowing oil to flow to the propeller moving the cylinder outward decreasing blade angle. – b. By blocking the flow of oil routing it back to the engine – c. By allowing oil to flow from the propeller moving the cylinder outward increasing blade angle.s | a. By allowing oil to flow to the propeller moving the cylinder outward decreasing blade angle. |
| 35. A reference position on a propeller blade that is measured from the center of the hub in inches – a. Blade back – b. Blade shank – c. Blade tip – d. Blade stations | d. Blade stations |
| 36. What is the purpose of a bulkhead (backplate) when installed on a propeller – a. To provide a spacer between the propeller and engine – b. To mount the propeller spinner – c. To provide space to mount static balance weightss | b. To mount the propeller spinner |
| 37. Propellers exposed to salt spray should be flush with: – a. Stoddard water -- b. Warm water – c. Fresh water – d. Soapy waters | c. Fresh water |
| 38. During the over-speed condition of a propeller, the – a. centrifugal force acting on the governor flyweights is greater than the tension of the speeder spring. – b. centrifugal force of the governor flyweights is equal to the speeder spring force. – c. tension on the speeder spring is greater than the centrifugal force acting on the governor flyweights | a. centrifugal force acting on the governor flyweights is greater than the tension of the speeder spring |
| 39. The primary purpose of a feathering propeller is to – a. prevent propeller damage when an engine fails in flight. – b. eliminate the drag created by a windmilling propeller when an engine fails in flight. – c. prevent further engine damage when an engine fails in flight | b. eliminate the drag created by a windmilling propeller when an engine fails in flight. |
| 40. Manually feathering a hydromechanical propeller means to – a. block governor oil pressure to the cylinder of the propeller. – b. port governor oil pressure from the cylinder of the propeller. – c. port governor oil pressure to the cylinder of the propeller. | b. port governor oil pressure from the cylinder of the propeller |
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