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! ! Set x10
set 10 PowerPlant
| Question | Answer |
|---|---|
| 001 Bootstrapping of a turbocharged engine is indicated by [AMP-J-013] an overboost condition of the engine on takeoff. a transient increase in engine power. a maximum increase in manifold pressure. | a transient increase in engine power. |
| 002 If the turbocharger waste gate is completely closed, [AMP-J-015] all the exhaust gases are directed through the turbine. none of the exhaust gases are directed through the turbine. the turbocharger is in the OFF position. | all the exhaust gases are directed through the turbine. |
| 003 What is the purpose of the density controller in a turbocharger system? [AMP-J-017] Maintains constant air velocity at the carburetor inlet. Limits the maximum manifold pressure that can be produced by the turbocharger at full throttle. Limits the maximum manifold pressure that can be produced at other than full throttle conditions. | Limits the maximum manifold pressure that can be produced by the turbocharger at full throttle. |
| 004 What is the purpose of the rate-of-change controller in a turbocharger system? [AMP-J-018] Limits the maximum manifold pressure that can be produced by the turbocharger at full throttle conditions. Controls the rate at which the turbocharger discharge pressure will increase. Controls the position of the waste gate after the aircraft has reached its critical altitude. | Controls the rate at which the turbocharger discharge pressure will increase. |
| 005 What directly regulates the speed of a turbocharger? [AMP-J-019] Waste gate. Throttle. Turbine. | Waste gate. |
| 006 What is the purpose of a turbocharger system for a small reciprocating aircraft engine? [AMP-J-020] Maintains constant air velocity in the intake manifold. Compresses air to maintain manifold pressure constant from sea level to the critical altitude of the engine. Compresses the air to hold the cabin pressure constant after the aircraft has reached its critical altitude. | Compresses air to maintain manifold pressure constant from sea level to the critical altitude of the engine. |
| 007 What are the three basic regulating components of a sea-level boosted turbocharger system? [AMP-J-021] Pump and bearing casing, compressor assembly, and density controller. Exhaust bypass assembly, density controller, and differential pressure controller. Exhaust bypass assembly, compressor assembly, and density controller. | Exhaust bypass assembly, density controller, and differential pressure controller. |
| 008 The differential pressure controller in a turbocharger system [AMP-J-022] positions the waste gate valve for maximum power. reduces bootstrapping during part-throttle operation. provides a constant fuel-to-air ratio. | reduces bootstrapping during part-throttle operation. |
| 009 The purpose of a sonic venturi on a turbocharged engine is to [AMP-J-023] limit the amount of air that can flow from the turbocharger into the cabin for pressurization. increase the velocity of the fuel/air charge. increase the amount of air that can flow from the turbocharger into the cabin for pressurization. | limit the amount of air that can flow from the turbocharger into the cabin for pressurization. |
| 010 What is the purpose of an augmenter used in some reciprocating engine exhaust systems? [AMP-J-039] To assist in displacing the exhaust gases. To reduce exhaust back pressure. To aid in cooling the engine. | To aid in cooling the engine. |
| 011 Cracks in cooling fins that do not extend into the cylinder head [AMP-J-041] may be repaired by adding a stiffener. may be repaired by removing the affected area and contour filing within limits. should be left alone and monitored. | may be repaired by removing the affected area and contour filing within limits. |
| 012 Which of the following should a mechanic consult to determine the maximum amount of cylinder cooling fin that could be removed when cracks are found? [AMP-J-042] Engine structure repair manual. AC 43.13-1A. Engine manufacturer's service or overhaul manual. | Engine manufacturer's service or overhaul manual. |
| 013 A bent cooling fin on an aluminum cylinder head should be [AMP-J-043] sawed off and filed smooth. straightened out as much as possible without breaking. left alone if no crack has formed. | left alone if no crack has formed. |
| 014 Where are cooling fins usually located on air-cooled engines? [AMP-J-044] Exhaust side of the cylinder head, inside the pistons, and connecting rods. Cylinder head, cylinder walls, and inside the piston. Cylinder head, cylinder barrel, and inside the piston. | Cylinder head, cylinder barrel, and inside the piston. |
| 015 Generally, a small crack just started in a cylinder baffle [AMP-J-047] may be stop drilled. requires repair by reinforcing, such as installation of a doubler over the area. requires no action unless it grows or is branched into two cracks. | may be stop drilled. |
| 016 (1) Some aircraft exhaust systems include an augmenter system to draw additional air over the engine for cooling. (2) Augmenter systems are used to create a low pressure area at the lower rear of the aircraft engine cowling. Regarding the above statements, [AMP-J-051] neither 1 nor 2 are true. both 1 and 2 are true. only 2 is true. | both 1 and 2 are true. |
| 017 True or False? Augmenter systems are used to create a low pressure area at the lower rear of the aircraft engine cowling. [AMP-J-051] False. True. | True. |
| 018 What is used to drive a supercharger? [AMP-J-024] Belt drive through a pulley arrangement. Exhaust gases. Gear train from the crankshaft. | Gear train from the crankshaft. |
| 019 In addition to causing accelerated wear, dust or sand ingested by a reciprocating engine may also cause [AMP-J-032] silicon fouling of spark plugs. sludge formation. acid formation. | silicon fouling of spark plugs. |
| 020 In an airplane equipped with an alternate air system, if the main air duct air filter becomes blocked or clogged, the [AMP-J-033] flow of air into the engine will be slowed or cut off unless alternate air is selected. system will automatically allow warm, unfiltered air to be drawn into the engine. system will automatically allow warm, filtered alternate air to be drawn into the engine. | system will automatically allow warm, unfiltered air to be drawn into the engine. |
| 021 Where would a carburetor air heater be located in a fuel injection system? [AMP-J-007] At the air intake entrance. Between the air intake and the venturi. None is required. | None is required. |
| 022 An increase in manifold pressure when carburetor heat is applied indicates [AMP-J-008] ice was forming in the carburetor. overheating of cylinder heads. mixture was too lean. | ice was forming in the carburetor. |
| 023 The use of the carburetor air heater when it is not needed causes [AMP-J-010] excessive increase in manifold pressure. a very lean mixture. a decrease in power and possibly detonation. | a decrease in power and possibly detonation. |
| 024 If carburetor or induction system icing is not present when carburetor heat is applied with no change in the throttle setting, the [AMP-J-027] manifold pressure will increase. engine RPM will increase. mixture will become richer. | mixture will become richer. |
| 025 When starting an engine equipped with a carburetor air heater, in what position should the heater be placed? [AMP-J-028] HOT. COLD. NEUTRAL. | COLD. |
| 026 The application of carburetor heat during engine operation will [AMP-J-029] decrease the volume of air in the cylinder. increase the density of air in the cylinder. decrease the weight of the fuel/air charge. | decrease the weight of the fuel/air charge. |
| 027 The application of carburetor heat will have which of the following effects? [AMP-J-030] The mixture will become richer. The mixture will become leaner. The manifold pressure will be increased. | The mixture will become richer. |
| 028 When operating an engine, the application of carburetor heat will have what effect on the air-fuel mixture? [AMP-J-031] Enriching the mixture until the AMC can make a compensation. Leaning the mixture until the AMC can make a compensation. Enriching the mixture because the AMC cannot make a correction for increased temperature. | Enriching the mixture until the AMC can make a compensation. |
| 029 A carburetor air pre-heater is not generally used on takeoff unless absolutely necessary because of the [AMP-J-037] possibility of induction system overboost. loss of power and possible detonation. inability of the engine to supply enough heat to make a significant difference. | loss of power and possible detonation. |
| 030 One source commonly used for carburetor air heat is [AMP-J-068] turbocharger heated air. exhaust gases. alternate air heat. | exhaust gases. |
| 031 The action of a carburetor airscoop is to supply air to the carburetor, but it may also [AMP-J-036] increase the pressure of the incoming air by ram effect. keep fuel lines cool and prevent vapor lock. cool the engine. | increase the pressure of the incoming air by ram effect. |
| 032 How do cowl flaps aid in cooling a horizontally opposed aircraft engine? [AMP-J-045] Directs air through the engine cylinders. Controls the amount of air flowing around the cylinders. Recirculates air through the engine cylinders. | Controls the amount of air flowing around the cylinders. |
| 033 The position of the cowl flaps during normal cruise flight conditions is [AMP-J-046] open. neutral. closed. | closed. |
| 034 During ground operation of an engine, the cowl flaps should be in what position? [AMP-J-049] Fully open. Opened according to ambient conditions. Fully closed. | Fully open. |
| 035 During an operational check of an electrically powered aircraft engine cowl flap system, the motor fails to operate. Which of the following is the first to be checked? [AMP-J-050] Flap actuator control switch. Flap actuator motor circuit breaker. Flap actuator motor. | Flap actuator motor circuit breaker. |
| 036 What is the position of the cowl flaps during engine starting and warmup operations under normal conditions? [AMP-J-066] Full open at all times. Open for starting, closed for warmup. Full closed at all times. | Full open at all times. |
| 037 The primary purpose of baffles and deflectors installed around cylinders of air-cooled aircraft engines is to [AMP-J-038] force cooling air into close contact with all parts of the cylinders. create a low pressure area aft of the cylinders. increase the volume of air used to cool the engine. | force cooling air into close contact with all parts of the cylinders. |
| 038 Aircraft reciprocating engine cylinder baffles and deflectors should be repaired as required to prevent loss of [AMP-J-040] cooling. power. fin area. | cooling. |
| 039 Which of the following assists in removing heat from the metal walls and fins of an air-cooled cylinder assembly? [AMP-J-048] An engine induction system. A baffle and cowl arrangement. An intercooler system. | A baffle and cowl arrangement. |
| 040 The purpose of an intercooler when used with a turbocharger is to cool the [AMP-J-060] air entering the carburetor from the turbocharger. exhaust gases before they come in contact with the turbo drive. turbocharger bearings. | air entering the carburetor from the turbocharger. |
| 041 When an engine with a subsonic divergent type inlet duct is running in place at high speed on the ground, the air pressure within the inlet is [AMP-K-003] ambient. positive. negative. | positive. |
| 042 The component(s) in a turbine engine that operate(s) at the highest temperatures is/are the [AMP-K-006] exhaust cone. first stage turbine nozzle guide vanes. turbine disks. | first stage turbine nozzle guide vanes. |
| 043 The vortex dissipators installed on some turbine-powered aircraft to prevent engine FOD utilize [AMP-K-001] variable inlet guide vanes (IGV) and/or variable first stage fan blades. variable geometry inlet ducts. a stream of engine bleed air blown toward the ground ahead of the engine. | a stream of engine bleed air blown toward the ground ahead of the engine. |
| 044 Vortex dissipator systems are generally activated by [AMP-K-002] a fuel pressure switch anytime an engine is operating. a landing gear switch. an engine inlet airflow sensor. | a landing gear switch. |
| 045 What engine instrument indications may shift when a turbofan engine anti-icing (bleed air) system is turned on? [AMP-K-004] Tachometer, fuel flow indicator, and EGT. Fuel flow indicator, EGT, and EPR. Tachometer, EGT, and EPR. | Tachometer, EGT, and EPR. |
| 046 Which statement is true regarding the air passing through the combustion section of a jet engine? [AMP-K-007] A small percentage is frequently bled off at this point to be used for air-conditioning and/or other pneumatic powered systems. Most is used for engine cooling. Most is used to support combustion. | Most is used for engine cooling. |
| 047 The purpose of an engine/inlet anti-ice system is primarily to [AMP-K-005] remove ice from engine and/or inlet areas and prevent ice formation in engine and/or inlet areas. prevent ice formation in engine and/or inlet areas. remove ice from engine and/or inlet areas. | prevent ice formation in engine and/or inlet areas. |
| 048 Why is high nickel chromium steel used in many exhaust systems? [AMP-L-001] High heat conductivity and flexibility. Corrosion resistance and low expansion coefficient. Corrosion resistance and high heat conductivity. | Corrosion resistance and low expansion coefficient. |
| 049 Reciprocating engine exhaust system designs commonly used to provide for ease of installation and/or allow for expansion and contraction may include the use of [AMP-L-002] spring loaded ball joints, slip joints, and bellows. spring loaded ball joints, slip joints, and flexible metal tubing. slip joints and flexible metal tubing. | spring loaded ball joints, slip joints, and bellows. |
| 050 What is the purpose of a slip joint in an exhaust collector ring? [AMP-L-004] It permits the collector ring to be installed in one piece. It reduces vibration and increases cooling. It aids in alignment and absorbs expansion. | It aids in alignment and absorbs expansion. |
| 051 Sodium-filled valves are advantageous to an aviation engine because they [AMP-L-005] dissipate heat well. dampen valve impact shocks. are lighter. | dissipate heat well. |
| 052 What type of nuts are used to hold an exhaust system to the cylinders? [AMP-L-006] High-temperature aluminum self-locking nuts. Brass or heat-resistant nuts. High-temperature fiber self-locking nuts. | Brass or heat-resistant nuts. |
| 053 Repair of exhaust system components [AMP-L-007] must be accomplished by the component manufacturer. is not recommended to be accomplished in the field. is impossible because the material cannot be identified. | is not recommended to be accomplished in the field. |
| 054 On an aircraft that utilizes an exhaust heat exchanger as a source of cabin heat, how should the exhaust system be inspected? [AMP-L-009] With the heater air shroud removed. X-rayed to detect any cracks. Hydrostatically tested. | With the heater air shroud removed. |
| 055 How should ceramic-coated exhaust components be cleaned? [AMP-L-010] By degreasing. With alkali. By mechanical means. | By degreasing. |
| 056 Select a characteristic of a good weld on exhaust stacks. [AMP-L-012] Porousness or projecting globules should show in the weld. The weld should be built up 1/8 inch. The weld should taper off smoothly into the base metal. | The weld should taper off smoothly into the base metal. |
| 057 How should corrosion-resistant steel parts such as exhaust collectors be blast cleaned? [AMP-L-014] Use sand which has not previously been used on iron or steel. Use super fine granite grit. Use steel grit which has not previously been used on soft iron. | Use sand which has not previously been used on iron or steel. |
| 058 Power recovery turbines used on some reciprocating engines are driven by the [AMP-L-015] velocity of the exhaust gases. exhaust gas pressure. crankshaft. | velocity of the exhaust gases. |
| 059 Reciprocating engine exhaust systems that have repairs or sloppy weld beads which protrude internally are unacceptable because they cause [AMP-L-016] local hot spots. base metal fatigue. localized cracks. | local hot spots. |
| 060 Ball joints in reciprocating engine exhaust systems should be [AMP-L-017] loose enough to permit some movement. tight enough to prevent any movement. disassembled and the seals replaced every engine change. | loose enough to permit some movement. |
| 061 All of the following are recommended markers for reciprocating engine exhaust systems except [AMP-L-018] India ink. Prussian blue. lead pencil. | lead pencil. |
| 062 Augmenter tubes are part of which reciprocating engine system? [AMP-L-020] Fuel. Induction. Exhaust. | Exhaust. |
| 063 Dislodged internal muffler baffles on a small reciprocating engine may cause [AMP-L-021] high oil consumption. an engine over-speed problem. excessive exhaust back pressure. | excessive exhaust back pressure. |
| 064 What is the purpose of an exhaust outlet guard on a small reciprocating engine? [AMP-L-022] To prevent dislodged muffler baffles from obstructing the muffler outlet. To reduce spark exit. To shield adjacent components from excessive heat. | To prevent dislodged muffler baffles from obstructing the muffler outlet. |
| 065 What could be a result of undetected exhaust system leaks in a reciprocating engine powered airplane? [AMP-L-023] Too low exhaust back pressure resulting in the desired power settings not being attained. Pilot/passenger incapacitation caused by carbon monoxide entering the cabin. A rough-running engine with increased fuel consumption. | Pilot/passenger incapacitation caused by carbon monoxide entering the cabin. |
| 066 How may reciprocating engine exhaust system leaks be detected? [AMP-L-024] An exhaust trail aft of the tailpipe on the airplane exterior. Signs of exhaust soot inside cowling and on adjacent components. Fluctuating manifold pressure indication. | Signs of exhaust soot inside cowling and on adjacent components. |
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