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Pop-Quiz
| Question | Answer |
|---|---|
| 1. How can a steel propeller hub be tested for cracks? a. By anodizing. b. By magnetic particle inspection. c. By etching. | b. By magnetic particle inspection |
| 2. Inspection of propeller blades by dye-penetrant inspection is accomplished to detect a. torsional stress. b. corrosion at the blade tip. c. cracks or other defects. | cracks or other defects |
| 3. Cold straightening a bent aluminum propeller blade may be accomplished by a. a person working under the supervision of the holder of a mechanic certificate with both airframe and powerplant ratings. b. the holder of a mechanic certificate with a powerplant rating. c. an appropriately rated repair station or the manufacturer. | c. an appropriately rated repair station or the manufacturer |
| 4. What is used to prevent the feathering spring from feathering the propeller when the engine is shut down and the engine stopped a. Latches b. Feathering pump motor c. High-pitch stops d. Oil not releasing back into the governor | Latches |
| 5. 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. | washing off with solvent. |
| 6. Airflow over the propeller blades causes the engine to keep turning is known as: a. Contra rotating b. Windmilling c. Reverse thrust d. Propeller braking | Windmilling |
| 7. Which of the following is the curved surface of a propeller blade formally known as? a. Blade back b. Blade face c. Blade chord | Blade back |
| 8. On a reversible pitch propeller, what are some of their operational characteristics: a. Aerodynamically brake the aircraft to reduce ground roll b. Negative blade angle to produce opposite thrust c. Feather in flight | Negative blade angle to produce opposite thrust |
| 9. Propeller aerodynamic (thrust) imbalance can be largely eliminated by a. Correct blade contouring and angle setting b. Keeping the propeller blades within the same plane of rotation c. Prevented maintenance on the propeller blades d. Static balancing | Correct blade contouring and angle setting |
| 10. If propeller cones or hub cone seats show evidence of galling and wear, the most likely cause is a. the pitch change stops were located incorrectly, causing the cone seats to act as the high pitch stop. b. the front cone was not fully bottomed against the crankshaft splines during installation. c. the propeller retaining nut was not tight enough during previous operation. | c. the propeller retaining nut was not tight enough during previous operation. |
| 11. What is the result of moving the throttle on a reciprocating engine when the propeller is in the constant-speed range with the engine developing cruise power? a. Movement of the throttle will not affect the blade angle. b. The RPM will vary directly with any movement of the throttle. c. Opening the throttle will cause an increase in blade angle. | c. Opening the throttle will cause an increase in blade angle. |
| 12. 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. | Thrust-bending force. |
| 13. Propeller fluid anti-icing systems generally use which of the following? a. Ethylene glycol. b. lsopropyl alcohol. c. Ethyl alcohol. | lsopropyl alcohol |
| 14. The pitch-changing mechanism of the hydromatic propeller is lubricated by a. the pitch-changing oil. b. using an approved-type grease in a grease gun at intervals prescribed by the propeller manufacturer. c. thoroughly greasing, necessary only during propeller overhaul. | the pitch-changing oil. |
| 15. To reduce drag and damage to a failed engine of a twin engine aircraft you must a. place the propeller control in the feather position b. place the propeller control in the increase position c. reduce blade angle to slow the propeller until it stops turning | place the propeller control in the feather position |
| 16. When a newly installed prop is installed, when do you lube the prop a. 5 hours b. after first flight/test c. 25 hours | after first flight/test |
| 17. The airworthiness standards for the issue of type certificates for small airplanes with nine or less passenger seats in the normal, utility, and acrobatic categories may be found in the a. Federal Aviation Regulations, Part 21. b. Supplemental Type Certificate. c. Federal Aviation Regulations, Part 23. | Federal Aviation Regulations, Part 23. |
| 18. During which of the following conditions of flight will the blade pitch angle of a constant-speed propeller be the greatest? a. High-speed, high-altitude cruising flight. b. Climb following takeoff. c. Approach to landing. | High-speed, high-altitude cruising flight. |
| 19. Which of the following forces or combination of forces operates to move the blades of a constant-speed counterweight-type propeller to the HIGH PITCH position? a. Engine oil pressure acting on the propeller piston-cylinder arrangement and centrifugal force acting on the counterweights. b. Centrifugal force acting on the counterweights. c. Prop governor oil pressure acting on the propeller piston-cylinder arrangement. | b. Centrifugal force acting on the counterweights. |
| 20. Proper operation of electric deicing boots on individual propeller blades may best be determined by a. feeling the sequence of boot heating and have an assistant observe the loadmeter indications. b. feeling the boots to see if they are heating. c. observing the ammeter or loadmeter for current flow. | a. feeling the sequence of boot heating and have an assistant observe the loadmeter indications. |
| 21. Some of the more modern constant-speed propeller assemblies, the pitch stops are located in the dome assembly. Where are the high and low pitch stops located in a Hamilton Standard 2 position propeller assembly? a. The dome assembly b. The hub and blade assembly c. The counterweight assembly | The counterweight assembly |
| 22. The aerodynamic force acting on a rotating propeller blade operating at a normal pitch angle tends to a. increase the pitch angle. b. bend the blades rearward in the line of flight. c. reduce the pitch angle. | reduce the pitch angle |
| 23. Anodizing is a common surface treatment of what kind of metal? a. Aluminum alloys b. Steel c. Titanium | Aluminum alloys |
| 24. Which of the following defects is cause for rejection of wood propellers? a. Solder missing from the screw heads securing the metal tipping b. No protective coating on propeller c. An oversize hub or bolt hole, or elongated bolt holes | An oversize hub or bolt hole, or elongated bolt holes |
| 25. What type of information is issued by the manufacturer of an aircraft that allows the mechanic to properly maintain the aircraft? a. Service bulletins b. Airworthiness directives c. Service manuals | Service manuals |
| 26. How does the propeller governor decrease blade angle and permits the engine to return to the on-speed setting of a non-feathering propeller? a. By blocking the flow of oil routing it back to the engine b. By allowing oil to flow to the propeller moving the cylinder to increase blade angle. c. By allowing oil to flow from the propeller moving the cylinder to decrease blade angle. | By allowing oil to flow from the propeller moving the cylinder to decrease blade angle. |
| 27. Oil leakage around the rear cone of a hydromatic propeller usually indicates a defective a. spider-shaft oil seal. b. dome-barrel oil seal. c. piston gasket. | spider-shaft oil seal. |
| 28. When lubricating a Hartzell propeller blade with grease, to prevent damage to the blade seals, the service manual may recommend on some models to a. pump grease into both zerk fittings for the blade simultaneously. b. remove one of the two zerk fittings for the blade and grease the blade through the remaining fitting. c. remove the seals prior to greasing and reinstall them afterwards. | b. remove one of the two zerk fittings for the blade and grease the blade through the remaining fitting. |
| 29. Propellers exposed to salt spray should be flush with: a. Warm water b. Stoddard water c. Fresh water d. Soapy water | Fresh water |
| 30. Why is the pulley stop screw on a propeller governor adjustable? a. To limit the maximum engine speed during takeoff. b. To limit the maximum propeller pitch for takeoff. c. To maintain the proper blade angle for cruising. | b. To limit the maximum propeller pitch for takeoff. |
| 31. What actuates the pilot valve in the governor of a constant-speed propeller? a. Governor pump oil pressure. b. Engine oil pressure. c. Governor flyweights. | Governor flyweights. |
| 32. What three forces act on rotating propeller? a. Aerodynamic twisting force, Torque bending force, Thrust bending force b. Torque bending force, Thrust bending force, Buffet force c. Torque bending force, Thrust bending force, Slipstream force d. Compression force, Spiraling slipstream, Accelerated slipstream | Aerodynamic twisting force, Torque bending force, Thrust bending force |
| 33. What unit in the propeller anti-icing system controls the output of the pump? a. Brush block b. Rheostat c. Cycling timer d. Pressure relief valve | Rheostat |
| 34. The gradual decrease in blade angle from the hub to tip is called? a. Reduce noise levels b. Pitch distribution c. Angle of attack d. Blade angle | Pitch distribution |
| 35. When the centrifugal force acting on the propeller governor flyweights overcomes the tension on the speeder spring, a propeller is in what speed condition? a. Overspeed. b. On speed. c. Under speed. | Overspeed |
| 36. An aircraft's propeller system beta range a. is used to produce zero or negative thrust. b. refers to the most fuel efficient pitch range to use at a given engine RPM. c. is used to achieve maximum thrust during takeoff. | a. is used to produce zero or negative thrust. |
| 37. Where is the deicing boot located? a. Tip b. Trailing edge c. Leading edge d. Back | Leading edge |
| 38. In an aircraft propeller system, the function of the constant speed control (CSC) is to a. Retard the ignition timing b. Maintain a selected engine speed within a selected the power available c. Increase the mixture d. Feather the propeller | b. Maintain a selected engine speed within a selected the power available |
| 39. Which of the following statements concerning the installation of a new fixed-pitch wood propeller is true? a. NAS close-tolerance bolts should be used to install the propeller. b. Inspect the bolts for tightness after the first flight and again after the first 25 hours of flying. c. If a separate metal hub is used, final track should be accomplished prior to installing the hub in the propeller. | Inspect the bolts for tightness after the first flight and again after the first 25 hours of flying. |
| 40. The acute angle between what two references creates the propeller blade angle? a. Plane of rotation and relative wind b. Chord line and relative wind c. Chord line and plane of rotation | Chord line and plane of rotation |
| 41. What are the two ranges of the power level quadrant? a. Alpha/Charlie b. Beta/Charlie c. Alpha/Beta d. Beta/Delta | c. Alpha/Beta |
| 42. What is the purpose of the Distributor Valve of a Hamilton Standard Hydromatic propeller? a. It is an extension of the engine drive shaft to prevent over travel of the propeller piston 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 and provides oil passage to the front side of the propeller piston for pitch change | c. It is an extension of the engine drive shaft and provides oil passage to the front side of the propeller piston for pitch change |
| 43. The pilot valve meters oil flow to increase propeller pitch and lower engine RPM during which condition? a. Overspeed b. On-speed c. Underspeed | Overspeed |
| 44. The theoretical distance that a propeller advances longitudinally in one revolution is determined by: a. Blade pitch b. Bade tip c. Blade back d. Slip | Blade pitch |
| 45. Manually feathering a hydromechanical propeller means to a. port governor oil pressure from the cylinder of the propeller. b. block governor oil pressure to the cylinder of the propeller. c. port governor oil pressure to the cylinder of the propeller. | a. port governor oil pressure from the cylinder of the propeller |
| 46. Blade angle is an angle formed by a line perpendicular to the crankshaft and a line formed by the a. chord of the blade. b. relative wind. c. blade face. | chord of the blade. |
| 47. What operational force tends to increase propeller blade angle? a. Thrust bending force. b. Aerodynamic twisting force. c. Centrifugal twisting force. | Aerodynamic twisting force. |
| 48. The thrust produced by a rotating propeller is a result of a. an area of low pressure behind the propeller blades. b. an area of decreased pressure immediately in front of the propeller blades. c. the angle of relative wind and rotational velocity of the propeller. | an area of decreased pressure immediately in front of the propeller blades. |
| 49. The purpose of permanently sealing and partially filling some models of McCauley propeller hubs with dyed oil is to a. make the location of cracks readily apparent. b. provide an always clean separate lubrication of the internal parts. c. dampen pressure surges and prevent too rapid changes in propeller blade angle. | make the location of cracks readily apparent. |
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