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88 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is the reason for using hydraulic valve lifters in an aircraft engine? |
Hydraulic valve lifters keep all of the clearance out of the valve operating mechanism. |
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What is meant by a cam-ground piston? |
A piston that is not perfectly round Until it reaches operating temperature |
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What is meant by a full floating wrist pin? |
A wrist pin that is not clamped in either the piston or the connecting rod |
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What excessive valve clearance cause the valve to open early or late |
Excessive clearance will cause the valve to open late and close early |
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What is the purpose of the stators in an axial flow compressor? |
The stators convert some velocity energy into pressure energy |
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What is meant by a free turbine turbo shaft engine |
A turbo shaft engine that has a turbine wheel or stage of the turbine wheels that is not used to drive the compressor of the gas generator |
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What is meant by a turbo fan engine? |
An axial flow turbine engine in which the first stage of compressor blades are lengthened |
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Where can you find the limit of repair allowed for the compressor blades of the aircraft turbine engine |
Service manual |
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What are two types of compression checks that can be performed on an aircraft reciprocating engines |
Differential compression check and a direct compression check |
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What items are checked in a hot section inspection of a turbine engine |
Combustion section ,turbine wheel , turbine case , exhaust section |
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What inspection must be performed on an aircraft reciprocating engine if it has been operated on turbine fuel |
The inside of the cylinder must be inspected with a borescope oil must be changed filters examined and given a careful run up |
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Where does the manifold pressure gauge used on an aircraft reciprocating engine pick up the pressure it measures |
Intake manifold |
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What is indicated if the needle of a ratiometer type oil temperature indicator pegs to the high side of the deal as soon as the aircraft master switch is turned on |
There is an open in the Bulk circuit |
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What type of indicating system is used to measure the exhaust gas temperature of a turbine engine |
A set of thermalcouples arranged in an averaging circuit |
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How does a torque meter actually measure the torque produced by an engine |
The torque meter is actually an oil pressure gauge |
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What kind of mechanism Is normally used to measure oil pressure on a reciprocating engine? |
Bourdon tube mechanism |
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How is a thermocouple type fire detection system checked for operation |
Current is sent through the heater in the thermal test unit |
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Does the pressure type continuous element fire detector system detect a general overheat condition as well as a fire? |
Yes |
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Can a thermal switch type fire detection system indicate a general overheat condition? |
No, spot detector |
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Can a thermocouple type fire detection system indicate a general overheat condition? |
No, rate of temperature rise type system |
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What happens when the pilot pulls the fire-pull T handle in the cockpit of a jet transport airplane |
Bottle discharge switches uncovered and armed , generator field relay is tripped ,fuel is shut off to the engine, hydraulic fluid is shut off to the pump , the engine bleed air is shut off , the hydraulic pump low pressure lights are deactivated |
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Which type of fire detection system operates on the rate of temperature rise |
The thermocouple system |
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How is a pressure type continuous element fire detector system checked for operation? |
Current heats the detector element and it releases enough gas to close the diaphragm switch |
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What is the minimum separation that is allowed between a wire bundle and a fluid line that carries combustible fluid or oxygen |
6 inches |
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What is used as the rectifier to produce direct current in a DC generator |
Brushes and a commutator |
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How does a vibrator type voltage regulator control the output voltage of a DC generator |
The contacts vibrate open and closed, putting the resistor in and out of the field circuit. |
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What is meant by paralleling the generators of a twin engine aircraft |
Adjusting the voltage of the generator so they will share the electrical load equally |
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What kind of rectifier is used in a DC alternator of the type that is used on most of the modern light airplanes |
Full wave, Three phase rectifier made up of six silicone diodes |
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What is used to maintain a constant frequency of the alternating current that is produced by an AC alternator driven by an aircraft turbine engine |
Constant speed drive |
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What three things must be synchronized before a three phase AC generator can be connected to a bus that is being served by another generator |
The voltage ,the frequency ,and the phase rotation of the generators |
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What is meant by the effective voltage of sine wave alternating current |
The value of the alternating current that is needed to produce the same amount of heat as this value of direct current |
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What is a starter generator that is used with many of the smaller gas turbine engines |
A component for starting the turbine engine, circuitry Can be shifted to act as compound wound generator |
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Where are the last chance oil filter located in a turbo jet engine |
Ahead of the nozzles that spray oil into the bearings |
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What information must be displayed around the oil filler opening for a turbo jet engine |
The word oil, and permissible oil designations |
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What is the function of the oil control rings on the piston of an aircraft reciprocating engine? |
Maintain proper quantity of oil between the piston and cylinder wall |
Maintain proper quantity of oil between the piston and cylinder wall |
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What type of piston rings are installed on the Pistons of an aircraft reciprocating engine |
Compression rings ,oil control rings ,and oil scraper rings |
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What is meant by spectrometric oil analysis |
Analysis that shows the various metals that are in the lubricating oil |
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What is meant by a hot- tank lubrication system? |
Oil cooler is in the pressure subsystem |
Oil cooler is in the pressure subsystem |
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What is meant by a cold tank lubrication system |
Oil cooler is in the scavenge scavenge sub system |
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What is the function of the capacitor in a magneto |
Minimizes arcing at the breaker points |
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What is a compensated magneto cam, and on what kind of engine is one used? |
Special cam used in magnetos mounted on high performance radial engines |
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What is the reason for having a low tension ignition system on some aircraft? |
Prevent flashover |
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What is meant by an all weather spark plug |
A shielded spark plug with a watertight seal on the ignition lead |
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What is checked when a magneto is internally timed |
Adjusting the breaker point so they will open the instant the rotating magnet is in its e-gap position |
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What is the purpose of a vernier coupling used on some aircraft magneto drives? |
Vernier coupling allows the magneto to engine timing to be varied in increments of less than 1° |
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What is the advantage of fine wire spark plugs over massive electrode spark plugs |
Fine wire spark plugs will not form solid lead contaminants |
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What is the function of an impulse coupling? |
It produces a hot and late spark |
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What malfunction in the ignition system would cause an aircraft reciprocating engine to continue to run after the ignition switch is placed in the off position |
Ignition switch is not grounding |
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What are two purposes of the manifold valve in the fuel injection system. |
Constant discharge fuel pressure for idling Positive shut off for the fuel when the engine is shut down
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What turned the auto ignition system in a turbo prop engine |
A torque pressure switch |
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What is adjusted when the fuel control unit of a turbine engine is trimmed |
The idle speed and maximum thrust speed |
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How does the mixture control change the fuel air mixture ratio on the Teledyne continental fuel injection system |
In full Rich position all fuel goes to the manifold valve And the idle cutoff position all fuel is returned to the pump inlet |
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What are the two basic types of fuel controls for an aircraft turbine engine |
Hydropneumatic , Electro hydromechanical |
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How does the exhaust gas temperature of a reciprocating engine tell anything about the fuel air mixture being burned by the engine |
A stoichiometric mixture produces the highest exhaust gas temperature |
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What two things are adjusted when adjusting the idling of a reciprocating engine? |
The throttle stop and the idle mixture control |
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What is controlled by the adjustment of the orifice in the fuel pump of a Teledyne continental fuel injection system. |
The high unmetered fuel pressure |
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What is the significance of the letters that are stamped on the flats of the fuel injection nozzle |
The Letters designate the relative size of the orifice in the injector nozzle |
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In what position is the mixture control placed for starting an engine that is equipped with a pressure carburetor |
The idle cut off position, the engine is started with fuel from the primer |
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What engine parameters are sensed by the fuel control unit of a turbine engine |
Engine RPM Inlet air pressure Compressor discharge pressure Burner can pressure Inlet air temperature |
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What kind of boost pump is used in most aircraft fuel systems |
Electrically operated centrifugal pumps |
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Where does an engine driven fuel pump direct the excess fuel from its pressure relief valve |
Back to the inlet side of the pump |
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What is meant by compensated relief valve in an engine driven fuel pump |
A pressure relief valve that is acted upon by a diaphragm as well as a spring |
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What is the purpose of the pressurizing and dump valve in the fuel system for a turbine engine? |
The pressurizing and dump valve acts as a flow divider |
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Dump valve function? |
Dumps all the fuel from the manifold |
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What should be done to an aircraft reciprocating engine if it has been operated on turbine engine fuel? |
All the turbine fuel should be drained out of the system and filled with the proper grade of Aviation gasoline.The engine should be given a compression check, and all of the cylinder should be inspected with a borescope. The oil should be drained and the filters carefully examined. The engines should be given a complete run up check. |
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What are the two basic types of turbine engine fuel |
Jet A and A1 |
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What is a roots blower |
An engine driven supercharger |
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Where is the heat taken from that is used to heat the induction air in a reciprocating engine |
muff |
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Where does the alternate air come from that is used with a pressure carburetor or a fuel injection system? |
Inside the engine Cowling |
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What is meant by a convergent inlet duct for a turbine engine |
A convergent inlet duct becomes smaller in the direction of the airflow |
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What is meant by a divergent Inlet duct for a turbine engine |
A divergent inlet duct becomes greater in the direction of airflow |
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What is the danger of operating an aircraft reciprocating engine with too high a carburetor air temperature |
Detonation |
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Why do some turbine engines use a variable inlet guide vanes ? |
The vanes Direct air for the most efficient operation |
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What is usually installed in a large reciprocating engine between the turbosupercharger and the carburetor |
Intercooler |
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What is used in helicopters to increase the amount of cooling air that flows over the engine cylinders |
Belt driven fan |
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Of what material are most reciprocating engine exhaust components made |
Corrosion resistant steel |
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What type of actuator is used to control the position of the turbo charger wastegate |
A hydraulic actuator |
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How does a power recovery turbine increase the power of a reciprocating engine |
Energy that would normally be lost is used to drive the turbines and the turbines assist in turning the crank shaft |
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What effect on turbine engine operation is caused by a change in the area of the exhaust nozzle |
Altering the area of the exhaust nozzle affects the compression ratio the RPM the mass airflow and EGT |
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Why do some super sonic aircraft use convergent divergent exhaust duct |
To produce thrust at supersonic velocities |
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What is done to cause a Hydromatic propeller to feather |
High pressure engine oil is directed into the propeller through the governor |
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What is done to cause a McCauley propeller to feather |
Oil is allowed to drain out of the propeller |
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Does Centrifugal twisting moment on a propeller blade tend to move the blades towards High pitch or low pitch |
Low pitch |
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What is the difference between a controllable propeller and a constant speed propeller |
The control system |
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When making a magneto check on an engine equipped with a constant speed propeller should the propeller control be in the low pitch or the high pitch position |
Low pitch position |
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What is adjusted inside the governor for a constant speed propeller to change the speed at which the propeller is operating |
The compression of the speeder Spring |
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What is the function of the accumulator that is used with some McCauley feathering propellers |
Help the propeller blades move toward low pitch when the propeller is being un-feathered |
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What keeps a McCauley feathering propeller from feathering when the engine is shut down on the ground |
Spring loaded latch mechanism |
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