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! ! ! ! Set 9
set 9 PowerPlant
| Question | Answer |
|---|---|
| 001 A defective primary capacitor in a magneto is indicated by [AMP-H-025] a weak spark. burned and pitted breaker points. a fine-grained frosted appearance of the breaker points. | burned and pitted breaker points. |
| 002 What is the purpose of using an impulse coupling with a magneto? [AMP-H-030] To compensate for backlash in the magneto and the engine gears. To produce a momentary high rotational speed of the magneto. To absorb impulse vibrations between the magneto and the engine. | To produce a momentary high rotational speed of the magneto. |
| 003 Aircraft magneto housings are usually ventilated in order to [AMP-H-032] allow heated air from the accessory compartment to keep the internal parts of the magneto dry. provide cooling and remove corrosive gases produced by normal arcing. prevent the entrance of outside air which may contain moisture. | provide cooling and remove corrosive gases produced by normal arcing. |
| 004 Failure of an engine to cease firing after turning the magneto switch off is an indication of [AMP-H-033] an open P-lead to ground. an open high-tension lead. a grounded magneto switch. | an open P-lead to ground. |
| 005 The spark occurs at the spark plug when the ignition's [AMP-H-095] secondary circuit is completed. primary circuit is completed. primary circuit is broken. | primary circuit is broken. |
| 006 In a high-tension ignition system, the current in the magneto secondary winding is [AMP-H-013] induced when the primary circuit is interrupted. conducted from the primary winding via the discharge of the capacitor. induced when the primary circuit discharges via the breaker points. | induced when the primary circuit is interrupted. |
| 007 What is the radial location of the two north poles of a four-pole rotating magnet in a high-tension magneto? [AMP-H-015] 270° apart. 90° apart. 180° apart. | 180° apart. |
| 008 Magneto pole shoes are generally made of [AMP-H-016] laminations of high-grade Alnico. laminations of high-grade soft iron. pieces of high-carbon iron. | laminations of high-grade soft iron. |
| 009 What components make up the magnetic system of a magneto? [AMP-H-018] Rotating magnet, the pole shoes, the pole shoe extensions, and the coil core. Pole shoes, the pole shoe extensions, and the primary coil. Primary and secondary coils. | Rotating magnet, the pole shoes, the pole shoe extensions, and the coil core. |
| 010 When will the voltage in the secondary winding of a magneto, installed on a normally operating engine, be at its highest value? [AMP-H-020] Just prior to spark plug firing. Toward the latter part of the spark duration when the flame front reaches its maximum velocity. Immediately after the breaker points close. | Just prior to spark plug firing. |
| 011 A magneto ignition switch is connected [AMP-H-027] parallel to the breaker points. in series with the primary capacitor and parallel to the breaker points. in series with the breaker points. | parallel to the breaker points. |
| 012 If new breaker points are installed in a magneto on an engine, it will be necessary to time the [AMP-H-090] breaker points to the cylinder 1. magneto drive to the engine. magneto internally and the magneto to the engine. | magneto internally and the magneto to the engine. |
| 013 When installing a magneto on an engine, the [AMP-H-094] magneto breaker points must be just closing. piston in cylinder 1 must be a prescribed number of degrees before top center on the compression stroke. piston in cylinder 1 must be a prescribed number of degrees after top center on the intake stroke. | piston in cylinder 1 must be a prescribed number of degrees before top center on the compression stroke. |
| 014 If the ground wire of a magneto is disconnected at the ignition switch, the result will be the [AMP-H-098] engine will stop running. affected magneto will be isolated and the engine will run on the opposite magneto. engine will not stop running when the ignition switch is turned off. | engine will not stop running when the ignition switch is turned off. |
| 015 Advantages of dual ignition in aircraft engines are a more complete and quick combustion of the fuel, provides a backup magneto system, and [AMP-H-099] increasing the output power of the engine. increasing the intensity of the spark at the spark plugs. permitting the use of lower grade fuels. | increasing the output power of the engine. |
| 016 Which of the following are distinct circuits of a high tension magneto? [AMP-H-101] Magnetic, primary, and secondary. Primary, P lead, and secondary. Magnetic, E-gap, and P lead. | Magnetic, primary, and secondary. |
| 017 What component of a dual magneto is shared by both ignition systems? [AMP-H-109] High-tension coil. Capacitor. Rotating magnet. | Rotating magnet. |
| 018 What would be the result if a magneto breaker point mainspring did not have sufficient tension? [AMP-H-110] The points will not open to the specified gap. The points will stick. The points will float or bounce. | The points will float or bounce. |
| 019 The capacitor-type ignition system is used almost universally on turbine engines primarily because of its high voltage and [AMP-H-041] high-heat intensity. low amperage. long life. | high-heat intensity. |
| 020 How does the ignition system of a gas turbine engine differ from that of a reciprocating engine? [AMP-H-047] Magneto-to-engine timing is not critical. A high-energy spark is required for ignition. One igniter plug is used in each combustion chamber. | A high-energy spark is required for ignition. |
| 021 In a turbine engine DC capacitor discharge ignition system, where are the high-voltage pulses formed? [AMP-H-048] At the triggering transformer. At the rectifier. At the breaker. | At the triggering transformer. |
| 022 Why are turbine engine igniters less susceptible to fouling than reciprocating engine spark plugs? [AMP-H-055] Turbine igniters operate at cooler temperatures. The high-intensity spark cleans the igniter. Larger opening. | The high-intensity spark cleans the igniter. |
| 023 The constrained-gap igniter plug used in some gas turbine engines operates at a cooler temperature because [AMP-H-056] it projects into the combustion chamber. the construction is such that the spark occurs beyond the face of the combustion chamber liner. the applied voltage is less. | the construction is such that the spark occurs beyond the face of the combustion chamber liner. |
| 024 Generally, when removing a turbine engine igniter plug, in order to eliminate the possibility of the technician receiving a lethal shock, the ignition switch is turned off and [AMP-H-058] the igniter lead is disconnected from the plug and the center electrode grounded to the engine after disconnecting the transformer-exciter input lead and waiting the prescribed time. disconnected from the power supply circuit. the transformer-exciter input lead is disconnected and the center electrode g | the igniter lead is disconnected from the plug and the center electrode grounded to the engine after disconnecting the transformer-exciter input lead and waiting the prescribed time. |
| 025 Great caution should be exercised in handling damaged hermetically sealed turbine engine igniter transformer units because [AMP-H-059] some contain radioactive material. some contain toxic chemicals. compounds in the unit may become a fire or explosion hazard when exposed to the air. | some contain radioactive material. |
| 026 Igniter plugs used in turbine engines have a long service life because they [AMP-H-060] have a high intensity spark. operate continuously with a lower spark. do not require continuous operation. | do not require continuous operation. |
| 027 Which statement is correct regarding the ignition system of a turbine engine? [AMP-H-068] It is energized during the starting and warmup periods only. The system is normally de-energized as soon as the engine starts. The system generally includes a polar inductor-type magneto. | The system is normally de-energized as soon as the engine starts. |
| 028 The type of ignition system used on most turbine aircraft engines is [AMP-H-096] high resistance. capacitor discharge. low tension. | capacitor discharge. |
| 029 Why do turbine engine ignition systems require high energy? [AMP-H-105] To ignite the fuel under conditions of high altitude and low temperatures. To ignite the fuel under conditions of high altitude and high temperatures. Because the applied voltage is much greater. | To ignite the fuel under conditions of high altitude and low temperatures. |
| 030 Which of the following are included in a typical turbine engine ignition system? [AMP-H-106] Two igniter plugs, one exciter unit, and two low-tension igniter leads. Two igniter plugs, one exciter unit, and two high-tension igniter leads. Two igniter plugs, two transformers, and two intermediate ignition leads. | Two igniter plugs, one exciter unit, and two high-tension igniter leads. |
| 031 The primary advantage of pneumatic (air turbine) starters over comparable electric starters for turbine engines is [AMP-H-123] a significant lack of wear to the commutator. its high power-to-weight ratio. that it does not disengage until the engine reaches idle. | its high power-to-weight ratio. |
| 032 Air turbine starters are generally designed so that reduction gear distress or damage may be detected by [AMP-H-127] inspection of a magnetic chip detector. characteristic sounds from the starter assembly during engine start. breakage of a shear section on the starter drive shaft. | inspection of a magnetic chip detector. |
| 033 Which of the following contains a minimum checklist for 100-hour inspections of engines? [AMP-C-006] Engine Specifications or Type Certificate Data Sheets. 14 CFR Part 43 Appendix D. 14 CFR Part 33 Appendix A. | 14 CFR Part 43 Appendix D. |
| 034 Which of the following component inspections is to be accomplished on a 100-hour inspection? [AMP-C-009] Check internal timing of magneto. Check valve timing. Check cylinder compression. | Check cylinder compression. |
| 035 What publication is used for guidance to determine whether a powerplant repair is major or minor? [AMP-C-019] Aircraft owner's manual. Airworthiness Directives. 14 CFR part 43. | 14 CFR part 43. |
| 036 A Cessna 180 aircraft has a McCauley propeller Model No. 2A34C50/90A. The propeller is severely damaged in a ground accident, and this model propeller is not available for replacement. Which of the following should be used to find an approved alternate replacement? [AMP-C-002] Aircraft Engine and Propeller Specifications/Type Certificate Data Sheets. Summary of Supplemental Type Certificates. Type Certificate Data Sheets/Aircraft Specifications. | Type Certificate Data Sheets/Aircraft Specifications. |
| 037 Which of the following contains a table that lists the engines to which a given propeller is adaptable? [AMP-C-008] Propeller Type Certificate Data Sheets. Aircraft Type Certificate Data Sheets. Engine Type Certificate Data Sheets. | Propeller Type Certificate Data Sheets. |
| 038 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 [AMP-C-020] 14 CFR Part 23. Supplemental Type Certificate. 14 CFR Part 21. | 14 CFR Part 23. |
| 039 Which of the following contains approved data for performing a major repair to an aircraft engine? [AMP-C-021] Engine Type Certificate Data Sheets. Supplemental Type Certificates. Manufacturer's maintenance instructions when FAA approved. | Manufacturer's maintenance instructions when FAA approved. |
| 040 What section in the instructions for continued airworthiness is FAA approved? [AMP-C-027] Engine overhaul manual or section. Engine maintenance manual or section. Airworthiness limitations section. | Airworthiness limitations section. |
| 041 Determine .....(C) Inspect the oil pump drive shaft (P/N 67512) on applicable engines in accordance with instructions contained in Connin Service Bulletin No. 295. Any shafts which are found to be damaged shall be replaced before further flight. These inspections shall be continued until Connin P/N 67512 (redesigned) or P/N 74641 oil pump drive shaft is installed at which time the inspections may be discontinued. [AMP-C-001] (B), (1). (A). (B), (2). | (B), (1). |
| 042 (1) Airworthiness Directives are Federal Aviation Regulations and must be complied with unless specific exemption is granted. (2) Airworthiness Directives of an emergency nature may require immediate compliance upon receipt. Regarding the above statements, [AMP-C-005] neither 1 nor 2 are true. both 1 and 2 are true. only 1 is true. | both 1 and 2 are true. |
| 043 When must an Airworthiness Directive (AD) be complied with after it becomes effective? [AMP-C-007] During the next scheduled inspection. At the next scheduled overhaul. As specified in the AD. | As specified in the AD. |
| 044 Where would one find type design information for an R1830-92 engine certificated under the Civil Air Regulations (CAR) and installed on a DC-3? [AMP-C-011] The Aircraft Specifications and Type Certificate Data Sheet. The Aircraft Engine Type Certificate Handbook. The Aircraft Engine Specifications. | The Aircraft Engine Specifications. |
| 045 Each powerplant installed on an airplane with a Standard Airworthiness Certificate must have been [AMP-C-014] originally certificated for that aircraft. type certificated. manufactured under the TSO system. | type certificated. |
| 046 When inspecting an aircraft reciprocating engine what document is used to determine if the proper magnetos are installed? [AMP-C-017] Engine manufacturer's maintenance manual. Aircraft Engine Specifications or Type Certificate Data Sheets. Instruction for continued airworthiness issued by the engine manufacturer. | Aircraft Engine Specifications or Type Certificate Data Sheets. |
| 047 Select the Airworthiness Directive applicability statement which applies to an IVO-355 engine, serial number T8164, with 2,100 hours total time and 300 hours since rebuilding. [AMP-C-024] Applies to all I.O. and TV10-355 engines, all serial numbers regardless of total time or since overhaul. Applies to all IVO-355 engines, serial numbers T8000 through T8300, having less than 2,400 hours total time. Applies to all IVO-355 engines, serial numbers T8000 through T8900 with 2,400 hours or mor | Applies to all IVO-355 engines, serial numbers T8000 through T8300, having less than 2,400 hours total time. |
| 048 What publication contains the mandatory replacement time for parts of a turbine engine? [AMP-C-025] Engine manufacturer's service instructions. 14 CFR Part 43 Engine manufacturer's maintenance manual. | Engine manufacturer's service instructions. |
| 049 True or False? Airworthiness Directives are Federal Aviation Regulations and must be complied with unless specific exemption is granted. [AMP-C-005] False. True. | True. |
| 050 What maintenance record(s) is/are required following a major repair of an aircraft engine? [AMP-C-022] Entries in the engine maintenance record and FAA Form 337. Entries in engine maintenance records and a list of discrepancies for the FAA. Entry in logbook. | Entries in the engine maintenance record and FAA Form 337. |
| 051 Which of the following is used to monitor the mechanical integrity of the turbines, as well as to check engine operating conditions of a turbine engine? [AMP-C-003] Engine oil pressure. Exhaust gas temperature. Engine pressure ratio. | Exhaust gas temperature. |
| 052 On a reciprocating engine aircraft using a shrouded exhaust muffler system as a source for cabin heat, the exhaust system should be [AMP-C-004] replaced at each reciprocating engine overhaul by a new or overhauled exhaust system or a hydrostatic test should be accomplished. visually inspected for any indication of cracks or an operational carbon monoxide detection test should be done. removed and the exhaust muffler checked for cracks by using magnetic particle inspection method or an h | visually inspected for any indication of cracks or an operational carbon monoxide detection test should be done. |
| 053 Straightening nitrided crankshafts is [AMP-C-012] approved by the manufacturer. -- not recommended. recommended. | not recommended. |
| 054 The breaking loose of small pieces of metal from coated surfaces, usually caused by defective plating or excessive loads, is called [AMP-C-013] flaking. brinelling. chafing. | flaking. |
| 055 A severe condition of chafing or fretting in which a transfer of metal from one part to another occurs is called [AMP-C-015] scoring. burning. galling. | galling. |
| 056 Indentations on bearing races caused by high static loads are known as [AMP-C-016] fretting. galling. brinelling. | brinelling. |
| 057 Which of the following can inspect and approve an engine major repair for return to service? [AMP-C-018] Certificated mechanic with airframe and powerplant ratings. Certificated mechanic with a powerplant rating. Certificated mechanic with inspection authorization. | Certificated mechanic with inspection authorization. |
| 058 A ground incident that results in propeller sudden stoppage would require a crankshaft runout inspection. What publication would be used to obtain crankshaft runout tolerance? [AMP-C-023] Current manufacturer's maintenance instructions. AC 43.13-1A, Acceptable Methods, Techniques, and Practices Aircraft Inspection and Repair. Type Certificate Data Sheet. | Current manufacturer's maintenance instructions. |
| 059 How is the flow range of the fuel discharge nozzles installed in a fuel injected reciprocating engine indicated? [AMP-C-026] By a letter stamped on the hex of the nozzle body. By a number stamped on the hex of the nozzle body. By the code located on the engine data plate. | By a letter stamped on the hex of the nozzle body. |
| 060 Which of the following conditions is usually not acceptable to any extent in turbine blades? [AMP-C-028] Dents. Cracks. Pits. | Cracks. |
| 061 (1) Serviceability limits for turbine blades are much more stringent than are those for turbine nozzle vanes. (2) A limited number of small nicks and dents can usually be permitted in any area of a turbine blade. Regarding the above statements [AMP-C-029] only 2 is true. only 1 is true. neither 1 nor 2 is true. | only 1 is true. |
| 062 True or False? Serviceability limits for turbine blades are much more stringent than are those for turbine nozzle vanes. [AMP-C-029] False. True. | True. |
| 063 True or False? A limited number of small nicks and dents can usually be permitted in any area of a turbine blade. [AMP-C-029] False. True. | False. |
| 064 During full power output of an un-supercharged engine equipped with a float-type carburetor, in which of the following areas will the highest pressure exist? [AMP-J-009] Venturi. Carburetor air scoop. Intake manifold. | Carburetor air scoop. |
| 065 As manifold pressure increases in a reciprocating engine, the [AMP-J-011] density of air in the cylinder increases. weight of the fuel/air charge decreases. volume of air in the cylinder increases. | density of air in the cylinder increases. |
| 066 Which of the following statements regarding volumetric efficiency of an engine is true? [AMP-J-012] It is impossible to exceed 100 percent volumetric efficiency of any engine regardless of the type of supercharger used. The volumetric efficiency of an engine will remain the same regardless of the amount of throttle opening. It is possible to exceed 100 percent volumetric efficiency of some engines by the use of superchargers of the proper type. | It is possible to exceed 100 percent volumetric efficiency of some engines by the use of superchargers of the proper type. |
| 067 Which of the following would be a factor in the failure of an engine to develop full power at takeoff? [AMP-J-014] Excessively rich setting on the idle mixture adjustment. Improper adjustment of carburetor heat valve control linkage. Failure of the economizer valve to remain closed at takeoff throttle setting. | Improper adjustment of carburetor heat valve control linkage. |
| 068 Boost manifold pressure is generally considered to be any manifold pressure above [AMP-J-016] 14.7 "Hg. 30 "Hg. 40 "Hg. | 30 "Hg. |
| 069 The purpose of a bellmouth compressor inlet is to [AMP-J-025] provide an increased ram air effect at low airspeeds maximize the aerodynamic efficiency of the inlet. provide an increased pressure drop in the inlet. | maximize the aerodynamic efficiency of the inlet. |
| 070 What method(s) is/are used to provide clean air to the engines of helicopters and turboprop airplanes that have particle (sand and ice) separators installed? [AMP-J-026] Sharp airflow directional change to take advantage of inertia and/or centrifugal force, and filters or engine inlet screens. Positive and negative charged areas to attract and/or repel particulates out of the airflow. Air/moisture separators, and 'washing' the air clean utilizing water droplets. | Sharp airflow directional change to take advantage of inertia and/or centrifugal force, and filters or engine inlet screens. |
| 071 If a fire starts in the induction system during the engine starting procedure, what should the operator do? [AMP-J-034] Turn off the fuel pump switches. Continue cranking the engine. Turn off the magneto switches. | Continue cranking the engine. |
| 072 On small aircraft engines, fuel vaporization may be increased by [AMP-J-035] heating the fuel before it enters the carburetor. circulating the fuel and air mixture through passages in the oil sump. cooling the air before it enters the engine. | circulating the fuel and air mixture through passages in the oil sump. |
| 073 Which of the following defects would likely cause a hot spot on a reciprocating engine cylinder? [AMP-J-052] Cowling air seal leakage. A cracked cylinder baffle. Too much cooling fin area broken off. | Too much cooling fin area broken off. |
| 074 What part of an air-cooled cylinder assembly has the greatest fin area per square inch? [AMP-J-053] Rear of the cylinder head. Exhaust valve port. Cylinder barrel. | Exhaust valve port. |
| 075 Reciprocating engines used in helicopters are cooled by [AMP-J-054] a fan mounted on the engine. the downdraft from the main rotor. blast tubes on either side of the engine mount. | a fan mounted on the engine. |
| 076 The greatest portion of heat generated by combustion in a typical aircraft reciprocating engine is [AMP-J-055] carried out with the exhaust gases. converted into useful power. dissipated through the cylinder walls and heads. | carried out with the exhaust gases. |
| 077 A broken cooling fin on a cylinder head [AMP-J-056] may be filed to smooth contours if damage and/or repair limits are not exceeded. should be left alone. is cause for rejection of the head. | may be filed to smooth contours if damage and/or repair limits are not exceeded. |
| 078 An engine becomes overheated due to excessive taxiing or improper ground runup. Prior to shut down, operation must continue until cylinders have cooled, by running engine at [AMP-J-057] high RPM with mixture control in RICH position. idle RPM. low RPM with oil dilution system activated. | idle RPM. |
| 079 Cylinder head temperatures are measured by means of an indicator and a [AMP-J-058] resistance bulb sensing device. wheatstone bridge sensing device. thermocouple sensing device. | thermocouple sensing device. |
| 080 High cylinder head temperatures are likely to result from [AMP-J-059] a very lean mixture at high power settings. a very rich mixture at high power settings. fouled spark plugs. | a very lean mixture at high power settings. |
| 081 Prolonged idling of an engine will usually result in [AMP-J-061] foreign material buildup on spark plugs. increased oil consumption. excessive cylinder head temperatures. | foreign material buildup on spark plugs. |
| 082 The most common method and generally the best conduction of heat from the inside of a cylinder barrel to the cooling air is accomplished by [AMP-J-062] shrinking on a jacket or muff of aluminum cooling fins around a steel cylinder sleeve. machining fins directly on the outside of the barrel. machining fins directly on the outside of the barrel and shrinking on a jacket or muff of aluminum cooling fins around a steel cylinder sleeve (on different areas of the barrel). | machining fins directly on the outside of the barrel. |
| 083 What is the function of a blast tube as found on aircraft engines? [AMP-J-063] A means of cooling the engine by utilizing the propeller backwash. A tube used to load a cartridge starter. A device to cool an engine accessory. | A device to cool an engine accessory. |
| 084 Which of the following results in a decrease in volumetric efficiency? [AMP-J-064] Part-throttle operation. Short intake pipes of large diameter. Cylinder head temperature too low. | Part-throttle operation. |
| 085 The undersides of pistons are frequently finned. The principal reason is to [AMP-J-065] provide for greater heat transfer to the engine oil. provide sludge chambers and sediment traps. support ring grooves and piston pins. | provide for greater heat transfer to the engine oil. |
| 086 Increased engine heat will cause volumetric efficiency to [AMP-J-067] remain the same. decrease. increase. | decrease. |
| 087 A method commonly used to prevent carburetor icing is to [AMP-J-001] preheat the intake air. mix alcohol with the fuel. electrically heat the throttle valve. | preheat the intake air. |
| 088 Carburetor icing is most severe at [AMP-J-002] high altitudes. low engine temperatures. air temperatures between 30 and 40°F. | air temperatures between 30 and 40°F. |
| 089 Into what part of a reciprocating engine induction system is deicing alcohol normally injected? [AMP-J-003] The low-pressure area ahead of the throttle valve. The supercharger or impeller section. The airstream ahead of the carburetor. | The airstream ahead of the carburetor. |
| 090 Carburetor icing on an engine equipped with a constant-speed propeller can be detected by [AMP-J-004] a decrease in manifold pressure with a constant RPM. a decrease in power output with no change in manifold pressure or RPM. an increase in manifold pressure with a constant RPM. | a decrease in manifold pressure with a constant RPM. |
| 091 What part of an aircraft in flight will begin to accumulate ice before any other? [AMP-J-005] Propeller spinner or dome. Carburetor. Wing leading edge. | Carburetor. |
| 092 Carburetor icing may be eliminated by which of the following methods? [AMP-J-006] Alcohol spray and electrically heated induction duct. Ethylene glycol spray and heated induction air. Alcohol spray and heated induction air. | Alcohol spray and heated induction air. |
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