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!!!&!Block 16 - HW-6
HW-6
| Question | Answer |
|---|---|
| 1. What three forces act on rotating propeller? a. Torque bending force, Thrust bending force, Slipstream force b. Compression force, Spiraling slipstream, Accelerated slipstream c. Torque bending force, Thrust bending force, Buffet force d. Aerodynamic twisting force, Torque bending force, Thrust bending force | d. Aerodynamic twisting force, Torque bending force, Thrust bending force |
| 2. A propeller synchrophasing system allows a pilot to reduce noise and vibration by == a. adjusting the plane of rotation of all propellers. == b. setting the pitch angle of all propellers exactly the same. == c. adjusting the phase angle between the propellers on an aircraft's engines. | c. adjusting the phase angle between the propellers on an aircraft's engines. |
| 3. When the pilot valve of the governor is lowered by the action of the flyweights in a feathering propeller system the oil transfer will cause == a. the oil flow out of the pitch change mechanism, increasing blade angle. b. the oil flow into the pitch change mechanism, decreasing blade angle. c. the oil flow out of the pitch change mechanism, decreasing blade angle | b. the oil flow into the pitch change mechanism, decreasing blade angle. |
| 4. 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 |
| 5. What operational force tends to increase propeller blade angle? == a. Thrust bending force. == b. Centrifugal twisting force. == c. Centrifugal force acting on the counter-weight | c. Centrifugal force acting on the counter-weight |
| 6. What is the purpose of a bulkhead (backplate) when installed on a propeller == a. To provide space to mount static balance weights == b. To provide a spacer between the propeller and engine == c. To mount the propeller spinner | c. To mount the propeller spinner |
| 7. Blade angles of a propeller == a. are proportional throughout the length of the blade == b. Increase from the tip to the shank == c. decrease from the tip to the shank | c. decrease from the tip to the shank |
| 8. Manually feathering a hydromechanical propeller means to a. port governor oil pressure to the cylinder of the propeller. == b. block governor oil pressure to the cylinder of the propeller. == c. port governor oil pressure from the cylinder of the propeller. | c. port governor oil pressure from the cylinder of the propeller. |
| 9. 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 decrease and RPM will decrease. == b. Blade angle will increase and RPM will decrease. == c. Blade angle will decrease and RPM will increase. | c. Blade angle will decrease and RPM will increase. |
| 10. What is effective pitch? == a. the distance a propeller should advance in one revolution == b. the distance a propeller actually advances == c. the ratio of thrust horsepower to- brake horsepower | b. the distance a propeller actually advances |
| 11. Propeller blade station numbers increase from == a. blade shank butt to tip. == b. tip to hub center line. == c. hub center line to tip. | c. hub center line to tip. |
| 12. What operational force causes the greatest stress on a propeller? == a. Centrifugal force. b. Thrust bending force. c. Aerodynamic twisting force. | a. Centrifugal force. |
| 13. Hartzell compact propellers have the pitch changing mechanism located where? == a. internal and external == b. external == c. internal | c. internal |
| 14. Where are stresses to the propeller greater? a. Near the tips due to centrifugal force and thrust b. Near the tips due to aerodynamic twisting == c. Near the hub due to centrifugal force and thrust | c. Near the hub due to centrifugal force and thrust |
| 15. In what position is the constant-speed propeller control placed to check the magnetos? a. Full increase, high propeller blade pitch angle. == b. Full increase, low propeller blade pitch angle. == c. Full decrease, low propeller blade pitch angle. | b. Full increase, low propeller blade pitch angle. |
| 16. On aircraft equipped with hydraulically operated constant-speed propellers, all ignition and magneto checking is done with the propeller in which position? == a. High pitch range. == b. High RPM. == c. Low RPM. | b. High RPM. |
| 17. During which of the following conditions of flight will the blade pitch angle of a constant-speed propeller be the greatest? == a. Climb following takeoff. == b. High-speed, high-altitude cruising flight. == c. Approach to landing. | b. High-speed, high-altitude cruising flight. |
| 18. The primary purpose of a cuff on a propeller is to == a. distribute anti-icing fluid. == b. strengthen the propeller. == c. increase the flow of cooling air to the engine nacelle. | c. increase the flow of cooling air to the engine nacelle. |
| 19. In an aircraft propeller system, the function of the constant speed control (CSC) is to == a. Increase the mixture == b. Feather the propeller == c. Retard the ignition timing == d. Maintain a selected engine speed within a selected the power available | d. Maintain a selected engine speed within a selected the power available |
| 20. The angle-of-attack of a rotating propeller blade is measured between the blade chord or face and which of the following? == a. Full low-pitch blade angle. == b. Relative airstream. == c. Plane of blade rotation. | b. Relative airstream. |
| 21. 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 face. == c. Blade chord. | a. Blade back. |
| 22. The purpose of permanently sealing and partially filling some models of McCauley propeller hubs with dyed oil is to == a. provide an always clean separate lubrication of the internal parts. == b. make the location of cracks readily apparent. == c. dampen pressure surges and prevent too rapid changes in propeller blade angle. | b. make the location of cracks readily apparent. |
| 23. Surface treatment to counter the effects of dye-penetrant inspection on a propeller is accomplished by == a. washing off with solvent. == b. rinse the blade in alodine solution. == c. wiping with alcohol. | b. rinse the blade in alodine solution. |
| 24. What is the minimum Taper Shaft to the Propeller Mounting surface contact == a. 95% minimum contact == b. 50% total contact == c. 70% minimum contact | c. 70% minimum contact |
| 25. What method would be used to inspect an aluminum propeller blade when a crack is suspected? == a. Dye-penetrant. == b. Magnetic particle. == c. Use a bright light. | a. Dye-penetrant. |
| 26. What type of imbalance will cause a two-blade propeller to have a persistent tendency to come to rest in a horizontal position (with the blades parallel to the ground) while being checked on a propeller balancing beam? == a. Harmonic. == b. Horizontal. == c. Vertical. | c. Vertical. |
| 27. Geometric pitch of a propeller is defined as the == a. effective pitch minus slippage. == b. angle between the blade chord and the plane of rotation. == c. effective pitch plus slippage. | c. effective pitch plus slippage. |
| 28. What is used to ensure that a propeller is installed in one position on some engine drive shafts? == a. a universal propeller protractor == b. indexing mark == c. dowel pins | c. dowel pins |
| 29. The theoretical distance that a propeller advances longitudinally in one revolution is determined by: == a. Blade pitch == b. Bade tip == C. Slip == d. Blade back | a. Blade pitch |
| 30. How is anti-icing fluid ejected from the slinger ring on a propeller? == a. Centrifugal force == b. Centripetal force == c. Pump pressure | a. Centrifugal force |
| 31. The actual distance a propeller moves forward through the air during one revolution is known as the == a. geometric pitch. == b. relative pitch. == c. effective pitch. | c. effective pitch. |
| 32. During the over-speed condition of a propeller, the == a. centrifugal force of the governor flyweights is equal to the speeder spring force. == b. tension on the speeder spring is greater than the centrifugal force acting on the governor flyweights == c. centrifugal force acting on the governor flyweights is greater than the tension of the speeder spring. | c. centrifugal force acting on the governor flyweights is greater than the tension of the speeder spring. |
| 33. What is a function of the automatic propeller synchronizing system on multiengine aircraft? == a. To control engine RPM and reduce vibration. == b. To control the power output of all engines. == c. To control the tip speed of all propellers. | a. To control engine RPM and reduce vibration. |
| 34. What operational force tends to bend the propeller blades forward at the tip? == a. Centrifugal-twisting force. b. Torque-bending force. c. Thrust-bending force. | c. Thrust-bending force. |
| 35. Counterweights on constant-speed propellers are generally used to aid in a. increasing blade angle. == b. unfeathering the propellers. == c. decreasing blade angle. | a. increasing blade angle |
| 36. On an aircraft equipped with full feathering hydromatic propellers, when the feathering cycle is begun, after reaching the full feather position the blade immediately begin to unfeather the cause is: a. The high pressure transfer valve is stuck in the open position == b. The distributor valve has malfunctioned == c. The pressure cut-out switch is stuck in the closed position | c. The pressure cut-out switch is stuck in the closed position |
| 37. Torque created by the engine will a. cause vibration of the propeller blades == b. cause the propeller blade to lead in the direction of flight == c. cause the propeller blades to lag in the opposite direction of rotation | c. cause the propeller blades to lag in the opposite direction of rotation |
| 38. To correct an out of track condition of a wooden propeller you would == a. use a wood planner shave of the excess wood from the thickest side of the hub b. place shims between the propeller and the mounting flange c. tighten the mounting bolts of the blade that is more forward | b. place shims between the propeller and the mounting flange |
| 39. A red arc located on an engine tachometer indicates == a. engine oil pressure == b. maximum engine RPM == c. critical range | c. critical range |
| 40. How is aircraft electrical power for propeller deicer systems transferred from the engine to the propeller hub assembly? == a. By slip rings and brushes. == b. By slip rings and segment plates. == c. By flexible electrical connectors. | a. By slip rings and brushes |
| 41. If a flanged propeller shaft has dowel pins == a. install the propeller so that the blades are positioned for hand propping. == b. the propeller can be installed in only one position. == c. check carefully for front cone bottoming against the pins. | b. the propeller can be installed in only one position. |
| 42. In accordance with CFR 14 Part 45 What information is required to on a propeller? = 1. Manufacture == 2. Model Number (P/N) == 3. Date of manufacture == 4. Type Certificate Number 5. Production Contract Number == 6 .Serial Number a. 1,2,4,5,6 == b. 1,2,3,4,5,6 == C. 2,3,4,5,6 | b. 1,2,3,4,5,6 |
| 43. On a reversible pitch propeller, what are some of their operational characteristics: == a. Feather in flight == b. Aerodynamically brake the aircraft to reduce ground roll == c. Negative blade angle to produce opposite thrust | c. Negative blade angle to produce opposite thrust |
| 44. What are three of the forces or pressures that can be used to change the blade angle of a constant speed propeller? == a. hydraulic pressure, air pressure, thrust bending force == b. spring pressure, hydraulic pressure, torque bending force == c. spring pressure, hydraulic pressure, air pressure | c. spring pressure, hydraulic pressure, air pressure |
| 45. One of the advantages of inspecting an aluminum propeller utilizing dye-penetrant inspection procedure is that == a. it indicates overspeed condition. == b. defects just below the surface are indicated. == c. it shows whether visible lines and other marks are actually cracks rather than scratches. | c. it shows whether visible lines and other marks are actually cracks rather than scratches. |
| 46. Oil leakage around the rear cone of a hydromatic propeller usually indicates a defective == a. dome-barrel oil seal. b. piston gasket. c. spider-shaft oil seal. | c. spider-shaft oil seal. |
| 47. 1) During takeoff, propeller thrust (pull) is greatest if the blade angle of attack is low and the engine power setting is high. (2) With the aircraft stationary, propeller thrust is greatest if the blade angle of attack is high and the engine power setting is high. == Regarding the above statements, a. both No. 1 and No. 2 are true. b. only No. 2 is true. c. only No. 1 is true. | c. only No. 1 is true. |
| 48. Aerodynamic twisting forces tend to ___ the propeller blade angle. a. Minimally effect b. Increase c. Decrease | b. Increase |
| 49. Constant-speed non-feathering Hartzell, McCauley and other propeller of similar design without counterweights decrease blade angle using a. Centrifugal twisting force and spring pressure b. Spring pressure and oil pressure c. Oil pressure | c. Oil pressure |
| 50. When operating an electrical de-ice system, how would the pilot know if one de-ice boot of a propeller not functioning properly a. the load meter was not indicating properly b. he could see ice build up on the blade c. the propeller icing warning light will illuminate | a. the load meter was not indicating properly |
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