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Pp writtens missed Q
| Question | Answer |
|---|---|
| the time/current apacities of a circuit breaker or fuse must be? | below those of the associated conductor |
| ignition occurs at 28 BTDC on certain four stroke cycle engine and the intake valve opens at 15 BTDC how many degrees of crankshaft travel after ignition does the intake valve open? | 373 |
| excessive oil is prevented from accumlating on the cylinder walls of a reciprocating engine by? | oil control rings on the pistons |
| the blade angle of a fixed pitch propeller | is smallest at the tip |
| how is the oil collected by the piston oil ring returned to the crankshaft? | through holes drilled in the piston oil ring groove |
| an indication that the optimum idle mixture has been obtained occurs when the mixture control is moved to idle cutoff and manifold pressure | decreases and rpm increases momentarily before the engine ceases to fire |
| a propeller synchrophasing system allows a pilot to reduce noise and vibration by | adjusting the phase angle between the propellers on an aircrafts engines |
| magneto breaker point must be timed to open when the | greatest magnestic field stress exists in the magnetic circuit |
| capacitance after firing of a spark plug is caused by | the stored energy in the ignition shielded lead unloading afer normal timed ignition |
| which of the following is most likely of occur if an overhead valve engine is operated with inadequate valve clearance | the valves will not seat positively during start and engine warm up |
| why do helicopters require a minimum of two synchronous tachometer system | one indicated engine rpm and the other main rotor rpm |
| valve clearance changed on opposed type engines using hydraulic lifters are accmplished by | push rod replacement |
| why is it unnecessary to flash the field of the exciter on a brushless alternator | permanent magnets are installed in the main field poles |
| the application of carburetor heat during engine operation will | decrease the weight of the fuel/air charge |
| what likely effect would a cracked distrubutor rotor have on a magneto | ground the secondary circuit throught the cracks |
| the floating control thermostat used on some reciprocating engine installation helps regulate oil temperature by | controlling air flow through the oil cooler |
| what action takes place when the flight deck control lever for a hydromatic constant speed propeller is actuated | compression of the speeder spring is changed |
| which of the following defects would likely cause a hot spot on a reiprocating engine cylinder | too much cooling fin area broken off |
| the blending of blades and vanes in a turbine engine | should be performed parallel to the length of the blade using smooth contours to minimize stress points |
| a powerplant using hydraulically controlled constant speed propeller is operating within the propellers constant speed rang at a fixed throttle seeting if the tension of the propeller governor control sping (speeder spring) is reduced by movement of the f | increase, engine manifold pressure will increase and engine rpm will decrease |
| how is a propeller controlled in a large aircraft with a turboprop installation | by the engine power lever |
| 1.preigniton can be vaused by improper ignition timing 2.detonation occurs when an area of the combustion chamber becomes incadescent and ignites the fuel/air misture in advance of normal timed ignition | neither number 1 nor 2 is true |
| which of the following fire detrction systems uses heat in the normal teesting of the system? | the thermocouple system & lindberg system |
| two continuous-loop fire detection system that will not test due to a broken detector element are the | kidde system & the fenwal system |
| the viscosity of a liquid is a measure of its | resistance to flow |
| the horsepower developed in the cylinders of a reciprocating engine is known as the | indicated horsepower |
| on a twin engine aircraft with fuel injected reciprocating engines one fuel flow indicator reads considerably higher than the other in all engines operating configurations. what is the probable cause of the indication | one or more fuel nozzles are clogged |
| where are cooling fins usually located on air cooled engines | cylinder head, cylinder barrel and inside the piston |
| a spark plug is fouled when | its spark grounds without jumping electrodes |
| possible failure related ferrous metal particles in turbine engine oil cause and (electrical) indication type magnetic chip detector to indicate their presence by | bridging the gap between the detector center (positive) electrode and the ground electrode |
| a safety feature usually employed in pneumatic starters that is used to prevent the stater from reaching burst speeds if inlet air does not terminate on schedule is the | stator nozzle design that chokes airflow and stabilizes turbine wheel speed |
| the device that controls the valume of the fuel/air mixture to the cylinder is called a | throttle valve |
| how do cowl flaps aid in cooling a horizontally opposed aircraft engine? | controls the amount of air flowing around the cylinders |
| when lubricating a newly overhauled steel hub propeller you should lubricare the propeller | after one to two hours of operation |
| which of the following are included in a typical turbine engine ignition system? | 1.two igniter plugs 3.one exciter unit 6.two high tensin igniter leads |
| which of the following condition would most likely lead to detonation | use of fuel with too low an octane rating |
| in a high tension ignition system the current in the mafneto secondary winding is | induced when the primary circuit is interrupted |
| which of the following indluences the operation of an automatic fuel control unit on a turbojet engine | burner pressure |
| when engine power is increased the constant speed propeller tries to function so that it will | maintain the rpm increase the blade angle and maintain a low angle of attack |
| which statment is true regarding a thermocouple type cylinder head temperature measuring system | the voltage output of a thermoucouple system is determined by the temperature difference between the two ends of the thermocouple |
| what likely effect would a cracked distributor rotor have on a magneto | gorund the secondary circuit through the crack |
| why is it unnecessary to flash the field of the exciter on a brushless alternator | permanent magnets are installed in the main field poles |
| in an axial flow turbin engine compressor bleed air is sometimes used to aid in cooling the | turbin, vans, blades and bearings |
| when will small isduction system air leak have the most noticeable effects on engine operation? | at low rpm |
| which type of bearing are generally used for shaft bearing and rocking are bearings in reciprocating engines | ball |
| what action takes place when the flight deck control lever for a hydromatic constant speed propeller is actated | compression of the speed spring is changed |
| which of the following lubrication system components is never located between the pressure pump and the egine pressure system | fuel line for oil dilution system |
| during engine operation if carburetor heat is applied it will | decrease the air density to the carburetor |
| engine pressure ratio (epr) is a ratio of the exhaust gas pressure to the engine inlet air pressure and indicates the thrust produced | only number one is true |
| in a reciprocating engine oil system the temperature bulb senses oil temperature | at a point afer the oil has passed through the oil cooler |
| what carburetor componet limits the maximim airflow into the engine at full throttle | venturi |
| the propeller angle is defined as the acute angle between the airfoil section chord line ( at the blade reference station) and which of the following | the plane of rotation |
| what will occur if the vapor vent float in a pressure carburetor loses it buoyancy | the amount of fuel returing to the fuel tank from the carburetor will increased |
| the components in a turbine engine that operates at the hightest temperature is the | first stage turbine nozzle guide vanes |
| after a fire is extinguished or overheat condition removed in aircraft equippe with a systron donner fire detector the detection system | automatically resets |
| the pressure of the supersonic air as it flows throught a divergent nozzle | descreases |
| what unit in a tachometer system sends information to the indicator | the three phase ac generator |
| fuel boost pumps are operated | to provide a positive flow of fuel to the engine |
| to recude the power output of an engine equipped with constant speed propeller and oprating near maximum BMEP the | manifold pressure is reduced with the throttle control before the rpm is reduced with the propeller control |
| 1.fuel maybe used to cool oil in gas turbine engines 2.ram air maybe used to cool oil in gas turbine engines | both number one and 2 are true |
| a supervisory electronic engine cortrol (eec) is a system that receives engine operating information and | adjusts a standard hydromechanical fuel control unit to obtain the most effective engine operation |
| engine oil temperature gauges indicate the temperature of the oil | entering the engine |
| advantages of dual ignition in aircraft engines include providing a backup magneto system and | increasing the output power of the engine |
| the valve assemblies of opposed reciprocating engine are lubricated by means of a | pressure system |
| what will be the likey 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 indication |
| 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 |
| which of the following is regulated in a generator to control its voltage output | the strength of the field |
| the action of a carburetor airscoop is to supply air to the carburetor but it may also | increase the pressure of the incoming air by ram effect |
| what is the primary purpose of the oil breather pressuriztion system that is used on turbine engines | provided a proper oil spay pattern from the main bearing oil jets |
| a mixture ratio of 11 to 1 normally refers to | 1 part fuel to 11 parts air |
| how is the speed of a constant speed propeller changed in flight | by chainging the load tension against the flyweights in the governor |
| what is used to drive a supercharger | gear train from the crankshaft |
| detonation occurs when the fuel/air mixture | burns to fast |
| if carburetor or induction system icing is not present when carburetor heat is applied with no change in the throttle setting the | mixture will become richer |
| the device that controls the volume of the fuel/air mixture to the cylinders is called | throttle valve |
| when in operation the speed of an APU | remains at or near rated speed regardless of the load conditon |
| If the points in a vibrator-type voltage regulator stick in the closed position while the generator is operating, what will be the probable result? | Generator output voltage will increase. |
| fire detection system that operates on the rate-of-temperature rise is a | thermocouple system. |
| What is the electrical location of the primary capacitor in a high-tension magneto? | In parallel with the breaker points. |
| How is the oil collected by the piston oil ring returned to the crankcase | Through holes drilled in the piston oil ring groove. |
| The main oil filters strain the oil at which point in the system? | Just as it leaves the pressure pump. |
| An increase in manifold pressure with a constant RPM will cause the bearing load in an engine to | increase |
| When does current flow through the coil of a solenoid-operated electrical switch? | Continually, as long as the control circuit is complete. |
| The pressure of supersonic air as it flows through a divergent nozzle | decreases |
| At what speed must a crankshaft turn if each cylinder of a four-stroke cycle engine is to be fired 200 times a minute? | 400 RPM. |
| Which of the following fire detection systems will detect a fire when an element is inoperative but will not test when the test circuit is energized? | The Kidde system and the Fenwal system. |
| The valve assemblies of opposed reciprocating engines are lubricated by means of a | pressure system. |
| Engine pressure ratio (EPR) is a ratio of the exhaust gas pressure to the engine inlet air pressure, and indicates the thrust produced. | only 1 is true. |
Created by:
Danielvanek24