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Adrians power plant
Powerlant adrian
| Question | Answer |
|---|---|
| Which Federal Aviation Regulation requirement prevents the use of automatic reset circuit breakers? | 14 CFR Part 23. |
| What is used to drive a supercharger? | Gear train from the crankshaft. |
| What is the principle of operation of the continuous-loop fire detector system sensor? | Core resistance material which prevents current flow at normal temperatures. |
| How may reciprocating engine exhaust system leaks be detected? | Signs of exhaust soot inside cowling and on adjacent components. |
| Which of the following best describes the blade movement of a propeller that is in the high RPM position when reversing action is begun? | Low pitch directly to reverse pitch. |
| When troubleshooting an engine for too rich a mixture to allow the engine to idle, what would be a possible cause? | Economizer valve not operating correctly. |
| The spark is produced in a magneto ignition system when the breaker points are | beginning to open |
| In the event a pneumatic start valve will not operate and the manual override must be used, the starter T-handle must be closed at scheduled starter drop out because | the starter will overspeed at a given N^2. |
| The density of air is very important when mixing fuel and air to obtain a correct fuel-to-air ratio. Which of the following weighs the most? | 100 parts of dry air |
| Maximum power is normally considered to be developed in a reciprocating engine with a fuel/air mixture ratio of approximately | 12:1 |
| Which of the following is NOT a function of the carburetor venturi? | Regulates the idle system. |
| At cruise RPM, some oil will flow through the relief valve of a gear-type engine oil pump. This is normal as the relief valve is set at a pressure which is | lower than the pressure pump capabilities. |
| Why are high-tension ignition cables frequently routed from the distributors to the spark plugs in flexible metallic conduits? | To reduce the effect of the high-frequency electromagnetic waves emanated during operation. |
| The function of the exhaust cone assembly of a turbine engine is to | straighten and collect the exhaust gases into a solid exhaust jet. |
| What are the rotational speed and blade pitch angle requirements of a constant-speed propeller during takeoff? | High-speed and low-pitch angle. |
| It is desirable that fuel lines have a gentle slope upward or downward and not have sharp curves or sharp rises and/or falls in order to | prevent vapor lock. |
| A nine-cylinder radial engine, using a multiple-point priming system with a central spider, will prime which cylinders? | One, two, three, eight, and nine. |
| A change in engine manifold pressure has a direct effect on the | mean effective cylinder pressure. |
| The aerodynamic force acting on a rotating propeller blade operating at a normal pitch angle tends to | increase the pitch angle. |
| The greatest density of flux lines in the magnetic circuit of a rotating magnet-type magneto occurs when the magnet is in what position? | Full alignment with the field shoe faces. |
| Select the correct statement concerning the idle system of a conventional float-type carburetor. | The low pressure between the edges of the throttle valve and the throttle body pulls the fuel from the idle passage. |
| Most large aircraft reciprocating engines are equipped with which of the following types of engine-driven fuel pumps? | Rotary-vane-type fuel pump. |
| What could be a result of undetected exhaust system leaks in a reciprocating engine powered airplane? | Pilot/passenger incapacitation caused by carbon monoxide entering the cabin. |
| The purpose of staggered ignition is to compensate for | diluted fuel/air mixture around exhaust valve. |
| Oil accumulation in the cylinders of an inverted in-line engine and in the lower cylinders of a radial engine is normally reduced or prevented by | extended cylinder skirts. |
| Indentations on bearing races caused by high static loads are known as | brinelling |
| 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? | Opening the throttle will cause an increase in blade angle. |
| In a four-stroke cycle aircraft engine, when does the ignition event take place? | Before the piston reaches TDC on compression stroke. |
| An advantage of the centrifugal-flow compressor is its high | pressure rise per stage. |
| What precaution should be taken when putting thread lubricant on a tapered pipe plug in a carburetor float bowl? | Engage the first thread of the plug, then put a small amount of lubricant on the second thread and screw the plug in. |
| 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 | only No. 1 is true |
| Defective spark plugs will cause the engine to run rough at | all speeds. |
| What is the primary purpose of changing aircraft engine lubricating oils at predetermined periods? | The oil becomes contaminated with moisture, acids, and finely divided suspended solid particles. |
| The fan rotational speed of a dual axial compressor forward fan engine is the same as the | low-pressure compressor. |
| When internally timing a magneto, the breaker points begin to open when | the magnet poles are a few degrees beyond the neutral position. |
| What is used in turbine engines to aid in stabilization of compressor airflow during low thrust engine operation? | Variable guide vanes and/or compressor bleed valves. |
| Which of the following conditions would most likely lead to detonation? | Use of fuel with too low an octane rating. |
| The main oil filters strain the oil at which point in the system? | Just as it leaves the pressure pump. |
| During the operation of an aircraft engine, the pressure drop in the carburetor venturi depends primarily upon the | air velocity. |
| For takeoff, a constant-speed propeller is normally set in the | LOW PITCH, high RPM position. |
| An aircraft's propeller system beta range | is used to produce zero or negative thrust. |
| What method is ordinarily used to make idle speed adjustments on a float-type carburetor? | An adjustable throttle stop or linkage. |
| How is the oil pressure delivery on a hydromatic propeller normally stopped after the blades have reached their full-feathered position? | Electric cutout pressure switch. |
| The blade angle of a fixed-pitch propeller | is smallest at the tip. |
| The primary purpose in setting proper valve timing and overlap is to | obtain the best volumetric efficiency and lower cylinder operating temperatures. |
| Powerplant instrument range markings show whether the current state of powerplant operation is normal, acceptable for a limited time, or unauthorized. (2) Powerplant instrument range markings are based on installed engine operating limits which may not e | both No. 1 and No. 2 are true. |
| Fuel may be used to cool oil in gas turbine engines. (2) Ram air may be used to cool oil in gas turbine engines. Regarding the above statements, | both No. 1 and No. 2 are true. |
| Using a cold spark plug in a high-compression aircraft engine would probably result in | normal operation. |
| Minor surface damage located in a repairable area, but not on the leading or trailing edges of aluminum blades, may be repaired by first | filing with a riffle file. |
| The fire detection system that uses a single wire surrounded by a continuous string of ceramic beads in a tube is the | Fenwal system. |
| The recurrent ingestion of dust or other fine airborne particulates into a turbine engine can result in | erosion damage to the compressor and turbine sections. |
| On a carburetor without an automatic mixture control as you ascend to altitude, the mixture will | be enriched. |
| Which of the following lubrication system components is never located between the pressure pump and the engine pressure system? | Fuel line for oil dilution system. |
| Fuel scheduling during APU start and under varying pneumatic bleed and electrical loads is maintained | automatically by the APU fuel control system. |
| Frequently, an aircraft's auxiliary power unit (APU) generator | is identical to the engine-driven generators. |
| An APU is usually rotated during start by | an electric starter. |
| When in operation, the speed of an APU | remains at or near rated speed regardless of the load condition. |
| When necessary, APU engine cooling before shutdown may be accomplished by | closing the bleed air valve. |
| Generally, when maximum APU shaft output power is being used in conjunction with pneumatic power | pneumatic loading will be automatically modulated to maintain a safe EGT. |
| On APU's equipped with a free turbine and load compressor, the primary function of the load compressor is to | provide bleed air for aircraft pneumatic systems. |
| Fuel is normally supplied to an APU from | the airplane's main fuel supply. |
| Usually, most of the load placed on an APU occurs when | the bleed air valve is opened. |
| The function of an APU air inlet plenum is to | stabilize the pressure of the air before it enters the compressor. |
| What is the purpose of a slip joint in an exhaust collector ring? | It aids in alignment and absorbs expansion. |
| Turbojet and turbofan thrust reverser systems are generally powered by | electricity. hydraulic pressure. pneumatic pressure. |
| How should ceramic-coated exhaust components be cleaned? | By degreasing. |
| The purpose of cascade vanes in a thrust reversing system is to | turn to a forward direction the fan and/or hot exhaust gases that have been blocked from exiting through the exhaust nozzle. |
| Ball joints in reciprocating engine exhaust systems should be | loose enough to permit some movement. |
| Augmenter tubes are part of which reciprocating engine system? | Exhaust |
| Select a characteristic of a good weld on exhaust stacks. | The weld should taper off smoothly into the base metal. |
| How are combustion liner walls cooled in a gas turbine engine? | By secondary air flowing through the combustion chamber. |
| Thrust reversers utilizing a pneumatic actuating system usually receive operating pressure from | the engine bleed air system. |
| the engine bleed air system. | Signs of exhaust soot inside cowling and on adjacent components. |
| Sodium-filled valves are advantageous to an aviation engine because they | dissipate heat well. |
| Repair of exhaust system components | is not recommended to be accomplished in the field. |
| Which of the following indicates that a combustion chamber of a jet engine is not operating properly? | Hot spots on the tail cone. |
| What is the purpose of an exhaust outlet guard on a small reciprocating engine? | To prevent dislodged muffler baffles from obstructing the muffler outlet. |
| Most exhaust system failures result from thermal fatigue cracking in the areas of stress concentration. This condition is usually caused by | the high temperatures at which the exhaust system operates. |
| How should corrosion-resistant steel parts such as exhaust collectors be blast cleaned? | Use sand which has not previously been used on iron or steel. |
| Engines using cold stream, or both cold and hot stream reversing include | high bypass turbofans. |
| The hot section of a turbine engine is particularly susceptible to which of the following kind of damage? | Cracking |
| Compared to normally aspirated engines, turbocharged engine exhaust systems operate at | higher temperatures and higher pressures. |
| higher temperatures and higher pressures. | Corrosion resistance and low expansion coefficient. |
| 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 | spring loaded ball/flexible joints. slip joints. bellows |
| On an aircraft that utilizes an exhaust heat exchanger as a source of cabin heat, how should the exhaust system be inspected? | With the heater air shroud removed. |
| Which statement is generally true regarding thrust reverser systems? | It is possible to move some aircraft backward on the ground using reverse thrust. |
| Which statement is generally true regarding thrust reverser systems? | It is possible to move some aircraft backward on the ground using reverse thrust. |
| The rearward thrust capability of an engine with the thrust reverser system deployed is | less than its forward capability. |
| What type of nuts are used to hold an exhaust system to the cylinders? | Brass or heat-resistant nuts. |
| Operating thrust reversers at low ground speeds can sometimes cause | 1. sand or other foreign object ingestion. 2. hot gas re-ingestion. 3. compressor stalls. |
| Power recovery turbines used on some reciprocating engines are driven by the | velocity of the exhaust gases. |
| All of the following are recommended markers for reciprocating engine exhaust systems except | lead pencil. |
| One source commonly used for carburetor air heat is | exhaust gases |
| Reciprocating engine exhaust systems that have repairs or sloppy weld beads which protrude internally are unacceptable because they cause | local hot spots |
| What is the proper operating sequence when using thrust reversers to slow an aircraft after landing? | Retard thrust levers to ground idle, raise thrust reverser levers as required, and retard thrust reverser levers to ground idle. |
| Dislodged internal muffler baffles on a small reciprocating engine may | obstruct the muffler outlet and cause excessive exhaust back pressure. |
| On turbojet powered airplanes, thrust reversers are capable of producing between | 35 and 50 percent of the rated thrust in the reverse direction. |
| What could be a result of undetected exhaust system leaks in a reciprocating engine powered airplane? | Pilot/passenger incapacitation caused by carbon monoxide entering the cabin. |
| How do the turbines which are driven by the exhaust gases of a turbo-compound engine contribute to total engine power output? | By driving the crankshaft through suitable couplings. |
| What will happen to the return oil if the oil line between the scavenger pump and the oil cooler separates? | The return oil will be pumped overboard. |
| The time in seconds required for exactly 60 cubic centimeters of oil to flow through an accurately calibrated orifice at a specific temperature is recorded as a measurement of the oil's | viscosity |
| What is the primary purpose of the tachometer on an axial-compressor turbine engine? | Monitor engine RPM during starting and to indicate overspeed conditions. |
| Oil leakage around the rear cone of a hydromatic propeller usually indicates a defective | spider-shaft oil seal. |
| Electrical wires larger than 10 gauge use uninsulated terminals. (2) Electrical wires smaller than 10 gauge use uninsulated terminals. Regarding the above statements, | only No. 1 is true |
| The compression ratio of an axial-flow compressor is a function of the | number of compressor stages. |
| What is a characteristic of a centrifugal-type fuel boost pump? | It separates air and vapor from the fuel. |
| What causes the fuel divider valve to open in a turbine engine duplex fuel nozzle? | Fuel pressure |
| 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? | Vertical |
| Propeller blade station numbers increase from | hub center line to tip. |
| Reduced blade vibration and improved airflow characteristics in gas turbines are brought about by | shrouded turbine rotor blades. |
| The purpose of an under current relay in a starter-generator system is to | disconnect power from the starter-generator and ignition when sufficient engine speed is reached. |
| Where are the high and low pitch stops of a Hamilton Standard constant-speed or two-position counterweight propeller located? | In the counterweight assembly. |
| Manually feathering a hydromechanical propeller means to | port governor oil pressure from the cylinder of the propeller. |
| Power recovery turbines used on some reciprocating engines are driven by the | velocity of the exhaust gases. |
| In a four-stroke cycle aircraft engine, when does the ignition event take place? | Before the piston reaches TDC on compression stroke. |
| Oil picks up the most heat from which of the following turbine engine components? | Turbine bearing. |
| What would be the result if a magneto breaker point mainspring did not have sufficient tension? | The points will float or bounce. |
| Most modern aircraft use circuit breakers rather than fuses to protect their electrical circuits. (2) Federal Aviation Regulations Part 23 requires that all electrical circuits incorporate some form of circuit protective device. Regarding the above stat | only No. 1 is true. |
| What is the purpose of the fuel transfer ejectors? | To assist in the transfer of fuel from the main tank to the boost pump sump. |
| What is the purpose of a safety gap in some magnetos? | To discharge the secondary coil's voltage if an open occurs in the secondary circuit. |
| What will be the effect if the spark plugs are gapped too wide? | Hard starting. |
| In order to reduce the possibility of ground shorting the circuits when the connectors are separated for maintenance, the AN and MS electrical connectors should be installed with the | pin section on the ground side of the electrical circuit. |
| How is aircraft electrical power for propeller deicer systems transferred from the engine to the propeller hub assembly? | By slip rings and brushes. |
| How does the aerodynamic twisting force affect operating propeller blades? | It tends to turn the blades to a high blade angle. |
| On small aircraft engines, fuel vaporization may be increased by | circulating the fuel and air mixture through passages in the oil sump. |
| Where are sludge chambers, when used in aircraft engine lubrication systems, usually located? | In the crankshaft throws. |
| Float-type carburetors which are equipped with economizers are normally set for | their leanest practical mixture delivery at cruising speeds and enriched by means of the economizer system at higher power settings. |
| Where is the throttle valve located on a float-type carburetor? | After the main discharge nozzle and venturi. |
| Which of the following best describes the blade movement of a full-feathering, constant-speed propeller that is in the LOW RPM position when the feathering action is begun? | High pitch directly to feather position. |
| A carburetor is prevented from leaning out during quick acceleration by the | accelerating system. |
| Maximum taper contact between crankshaft and propeller hub is determined by using | bearing blue color transfer. |
| Which of the following contains a table that lists the engines to which a given propeller is adaptable? | Propeller Type Certificate Data Sheets. |
| Compared to reciprocating engine oils, the types of oils used in turbine engines | have less tendency to produce lacquer or coke. |
| A major difference between the Teledyne-Continental and RSA (Precision Airmotive or Bendix) continuous flow fuel injection systems in fuel metering is that the | Continental system uses fuel pressure only as a metering force. |
| The velocity of subsonic air as it flows through a convergent nozzleThe velocity of subsonic air as it flows through a convergent nozzle | increases.increases. |
| Where would a carburetor air heater be located in a fuel injection system? | None is required. |
| The primary concern in establishing the firing order for an opposed engine is to | provide for balance and eliminate vibration to the greatest extent possible. |
| When trimming a turbine engine, the fuel control is adjusted to | set idle RPM and maximum speed or EPR. |
| Which of the following is regulated in a generator to control its voltage output? | The strength of the field. |
| Reciprocating engines used in helicopters are cooled by | a fan mounted on the engine. |
| The fuel level within the float chamber of a properly adjusted float-type carburetor will be | slightly lower than the discharge nozzle outlet. |
| Which of the following would indicate a general weak-engine condition when operated with a fixed-pitch propeller or test club? | Lower than normal static RPM, full throttle operation. |
| Upon what does the output frequency of an ac generator (alternator) depend? | The speed of rotation and the number of field poles. |
| The speed of rotation and the number of field poles. | effective pitch plus slippage. |
| Which of the following statements regarding volumetric efficiency of an engine is true? | It is possible to exceed 100 percent volumetric efficiency of some engines by the use of superchargers of the proper type. |
| The primary concern in establishing the firing order for an opposed engine is to | provide for balance and eliminate vibration to the greatest extent possible. |
| 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? | Blade back. |
| A certain direct current series motor mounted within an aircraft draws more amperes during start than when it is running under its rated load. The most logical conclusion that may be drawn is | the condition is normal for this type of motor. |
| What is the approximate position of the rotating magnet in a high-tension magneto when the points first close? | Full register. |
| What is the relationship between the pressure existing within the throat of a venturi and the velocity of the air passing through the venturi? | The pressure is inversely proportional to the velocity. |
| Boost pumps in a fuel system | provide a positive flow of fuel to the engine pump. |
| What should be checked/changed to ensure the validity of a turbine engine performance check if an alternate fuel is to be used? | Fuel specific gravity setting. |
| Where is the oil of a dry sump reciprocating engine exposed to the temperature control valve sensing unit? | Oil cooler inlet. |
| Generally, when starting a turbine engine, the starter should be disengaged | after the engine has reached self-accelerating speed. |
| Cold straightening a bent aluminum propeller blade may be accomplished by | an appropriately rated repair station or the manufacturer. |
| A rotary-vane pump is best described as a | positive-displacement pump. |
| In order to stabilize cams, springs, and linkages within the fuel control, manufacturers generally recommend that all final turbine engine trim adjustments be made in the | increase direction. |
| Why is a constant-speed counterweight propeller normally placed in full HIGH PITCH position before the engine is stopped? | To prevent exposure and corrosion of the pitch changing mechanism. |
| Which unit most accurately indicates fuel consumption of a reciprocating engine? | Fuel flowmeter. |
| The operating temperature valve clearance of a radial engine as compared to cold valve clearance is | greater |
| What is the radial location of the two north poles of a four-pole rotating magnet in a high-tension magneto? | 180° apart |
| What is the purpose of a slip joint in an exhaust collector ring? | It aids in alignment and absorbs expansion. |
| In order to maintain a constant oil pressure as the clearances between the moving parts of an engine increase through normal wear, the supply pump output | remains relatively constant (at a given RPM) with less oil being returned to the pump inlet by the relief valve. |
| The primary purpose of a feathering propeller is to | eliminate the drag created by a windmilling propeller when an engine fails in flight. |
| The RPM indication of a synchronous ac motor-tachometer is governed by the generator | frequency |
| Alignment of the marks provided for internal timing of a magneto indicates that the | magneto is in E-gap position. |
| How is anti-icing fluid ejected from the slinger ring on a propeller? | By centrifugal force. |
| What could cause a lean mixture and high cylinder head temperature at sea level or low altitudes? | Automatic mixture control stuck in the extended position. |
| Which of the following Federal Aviation Regulations require that all aircraft using fuses as the circuit protective devices carry 'one spare set of fuses, or three spare fuses of each kind required'? | 14 CFR Part 91. |
| What type of oil do most engine manufacturers recommend after new reciprocating engine break-in? | Ashless-dispersant oil. |
| Ignition check during engine runup indicates excessive RPM drop during operation on the right magneto. The major portion of the RPM loss occurs rapidly after switching to the right magneto position (fast drop). The most likely cause is | faulty or fouled spark plugs. |
| Manufacturers normally require turbine engine oil servicing within a short time after engine shutdown primarily to | prevent overservicing. |
| Motor driven impeller and turbine fuel flow transmitters are designed to transmit data | using aircraft electrical system power. |
| The holding coil on a hydromatic propeller feathering button switch holds a solenoid relay closed that applies power to the propeller | feathering pump motor. |
| In an airplane equipped with an alternate air system, if the main air duct air filter becomes blocked or clogged, the | system will automatically allow warm, unfiltered air to be drawn into the engine. |
| One of the best ways to increase engine power and control detonation and preignition is to | use water injection. |
| What will be the likely result if the piston ring gaps happen to be aligned when performing a differential-pressure compression check on a cylinder? | A worn or defective ring(s) indication. |
| Jet engine thermocouples are usually constructed of | chromel-alumel. |
| What part of an air-cooled cylinder assembly has the greatest fin area per square inch? | Exhaust valve port. |
| Why do some turbine engines have more than one turbine wheel attached to a single shaft? | To extract more power from the exhaust gases than a single wheel can absorb. |
| The constant current method of charging a ni-cad battery | is the method most effective in maintaining cell balance. |
| What publication is used for guidance to determine whether a powerplant repair is major or minor? | Federal Aviation Regulations, Part 43, appendix A. |
| On APU's equipped with a free turbine and load compressor, the primary function of the load compressor is to | provide bleed air for aircraft pneumatic systems. |
| The primary purpose of baffles and deflectors installed around cylinders of air-cooled aircraft engines is to | force cooling air into close contact with all parts of the cylinders. |
| The centrifugal twisting force acting on a propeller blade is | greater than the aerodynamic twisting force and tends to move the blade to a lower angle. |
| A continuous-loop fire detector is what type of detector? | Overheat detector. |
| Some high-volume turboprop and turbojet engines are equipped with two-spool or split compressors. When these engines are operated at high altitudes, the | low-pressure rotor will increase in speed as the compressor load decreases in the lower density air. |
| Turbine nozzle diaphragms located on the upstream side of each turbine wheel, are used in the gas turbine engine to | increase the velocity of the heated gases flowing past this point. |
| Which of the following determines oil and grease specifications for lubrication of propellers? | Propeller manufacturers |
| Which statement is correct regarding engine crankshafts? | Moveable counterweights serve to reduce the torsional vibrations in an aircraft reciprocating engine |
| Which of the following lubrication system components is never located between the pressure pump and the engine pressure system? | Fuel line for oil dilution system. |
| Why is a constant-speed drive used to control the speed of some aircraft engine-driven generators? | So that the frequency of the alternating current output will remain constant. |
| The maximum allowable voltage drop between the generator and the bus bar is | 2 percent |
| What controls the constant-speed range of a constant-speed propeller? | The mechanical limits in the propeller pitch range. |
| The position of the cowl flaps during normal cruise flight conditions is | Closed |
| Why are high-tension ignition cables frequently routed from the distributors to the spark plugs in flexible metallic conduits? | To reduce the effect of the high-frequency electromagnetic waves emanated during operation. |
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