WHEN STARTING A TURBINE ENGINE, A HUNG START IS INDICATED IF THE ENGINE: fails to reach idle RPM exhaust gas temperature exceeds specified limits RPM exceeds specified operating speed.
FAILURE OF AN ENGINE TO CEASE FIRING AFTER TURNING THE MAGNETO SWITCH OFF IS AN INDICATION OF: an open P-lead to ground a grounded magneto switch an open high tension lead.
THE THRUST PRODUCED BY A ROTATING PROPELLER IS A RESULT OF: an area of low pressure behind the propeller blades the angle of relative wind and rotational velocity of the propeller an area of decreased pressure immediately in front of the propeller blades.
THE MAXIMUM ALLOWABLE VOLTAGE DROP BETWEEN THE GENERATOR AND THE BUS BAR IS: 2 percent of the regulated voltage less than the voltage drop permitted between the battery and the bus bar 1 percent of the regulated voltage.
THE AIR PASSING THROUGH THE COMBUSTION CHAMBER OF A TURBINE ENGINE IS: used to support combustion and to cool the engine entirely combined with fuel and burned speeded up and heated by the action of the turbines.
IF A FLANGED PROPELLER SHAFT HAS DOWEL PINS: install the propeller so that the blades are positioned for hand propping check carefully for front cone bottoming against the pins the propeller can be installed in only one position.
ELECTRIC MOTORS ARE OFTEN CLASSIFIED ACCORDING TO THE METHOD OF CONNECTING THE FIELD COILS AND ARMATURE. AIRCRAFT ENGINE STARTER MOTORS ARE GENERALLY OF WHICH TYPE? compound series shunt (parallel).
(1) A MECHANIC CERTIFICATE WITH A POWERPLANT RATING AUTHORIZES THE HOLDER TO REPAIR DEEP SCARS, NICKS, AND DENTS ON ALUMINUM PROPELLER BLADES. (2) A MECHANIC CERTIFICATE WITH A POWERPLANT RATING AUTHORIZES THE HOLDER TO PERFORM MINOR STRAIGHTENING OF STEEL PROPELLER BLADES.
REGARDING ABOVE STATEMENTS: only NO. 1 is true both NO. 1 and NO. 2 are true neither NO. 1 nor NO. 2 is true.
THE ECONOMIZER SYSTEM IN A FLOAT TYPE CARBURETOR: functions only at cruise and idle speeds increases the fuel/air ratio at high power settings keeps the fuel/air ratio constant.
CAPACITANCE AFTERFIRING IN MOST MODERN SPARK PLUGS IS REDUCED BY THE USE OF: fine wire electrodes aluminum oxide insulation a built-in resistor in each plug.
WHAT TYPE OF LUBRICANT MAY BE USED TO AID IN PULLING ELECTRICAL WIRES OR CABLES THROUGH CONDUITS? soapstone talc rubber lubricant silicone grease.
WHICH OF THE FOLLOWING STATEMENTS CONCERNING THE INSTALLATION OF A NEW FIXED PITCH WOOD PROPELLER IS TRUE? inspect the bolts for tightness after the first flight and again after the first 25 hours of flying if a separate metal hub is used, final track should be accomplished prior to installing the hub in the propeller NAS close tolerance bolts should be used to install the propeller.
POSSIBLE FAILURE RELATED FERROUS METAL PARTICLES IN TURBINE ENGINE OIL CAUSE AN (ELECTRICAL) INDICATING TYPE MAGNETIC CHIP DETECTOR TO INDICATE THEIR PRESENCE BY: generating a small electric current that is caused by the particles being in contact with the dissimilar metal of the detector tip bridging the gap between the detector center (positive) electrode and the ground electrode disturbing the magnetic lines of flux around the detector tip.
AT WHAT STAGE IN A TURBINE ENGINE ARE GAS PRESSURES THE GREATEST? compressor outlet turbine outlet compressor inlet.
A CLICKING SOUND HEARD AT ENGINE COAST-DOWN IN A PNEUMATIC STARTER INCORPORATING A SPRAG CLUTCH RATCHET ASSEMBLY IS AN INDICATION OF: one or more broken pawl springs gear tooth and/or pawl damage the pawls re-contacting and riding on the ratchet gear.
THE ACTUAL DISTANCE A PROPELLER MOVES FORWARD THROUGH THE AIR DURING ONE REVOLUTION IS KNOWN AS THE: relative pitch effective pitch geometric pitch.
LOW OIL PRESSURE CAN BE DETRIMENTAL TO THE INTERNAL ENGINE COMPONENTS. HOWEVER, HIGH OIL PRESSURE: has a negligible effect should be limited to the engine manufacturer's recommendations will not occur because of pressure losses around the bearings.
HOW IS AIRCRAFT ELECTRICAL POWER FOR PROPELLER DEICER SYSTEMS TRANSFERRED FROM THE ENGINE TO THE PROPELLER HUB ASSEMBLY? by flexible electrical connectors by slip rings and brushes by slip rings and segment plates.
USING STANDARD ATMOSPHERIC CONDITIONS, THE STANDARD SEA LEVEL TEMPERATURE IS: 59° F 59° C 29° C.
KEROSENE IS USED AS TURBINE ENGINE FUEL BECAUSE: kerosene has more heat energy per gallon and lubricates fuel system components where physical separation of the fuel lines from electrical wiring or conduit is impracticable, locate the fuel line kerosene has very high volatility which aids in ignition and lubrication.
THE BRAYTON CYCLE IS KNOWN AS THE CONSTANT: mass cycle temperature cycle pressure cycle.
WHICH OF THE FOLLOWING IS A PRIMARY ENGINE INSTRUMENT? tachometer fuel flowmeter airspeed indicator.
WHEN THE CENTRIFUGAL FORCE ACTING ON THE PROPELLER GOVERNOR FLYWEIGHTS OVERCOMES THE TENSION ON THE SPEEDER SPRING, A PROPELLER IS IN WHAT SPEED CONDITION? on speed overspeed underspeed.
NEWTON'S FIRST LAW OF MOTION, GENERALLY TERMED THE LAW OF INERTIA, STATES: to every action there is an equal and opposite reaction force is proportional to the product of mass and acceleration every body persists in its state of rest, or of motion in a straight line, unless acted upon by some outside force.
WHEN WILL THE VOLTAGE IN THE SECONDARY WINDING OF A MAGNETO, INSTALLED ON A NORMALLY OPERATING ENGINE, BE AT ITS HIGHEST VALUE? toward the latter part of the spark duration when the flame front reaches its maximum velocity just prior to spark plug firing immediately after the breaker points close.
IF AN ENGINE WITH A STROKE OF 6 INCHES IS OPERATED AT 2.000 RPM THE PISTON MOVEMENT WITHIN THE CYLINDER WILL BE: constant during the entire 360° of crankshaft travel at maximum velocity around TDC at maximum velocity 90° after TDC.
WHICH FUEL/AIR MIXTURE WILL RESULT IN THE HIGHEST ENGINE TEMPERATURE "ALL OTHER FACTORS REMAINING CONSTANT"? a mixture leaner than a rich best power mixture of 0.085 a mixture leaner than a manual lean mixture of 0.060 a mixture richer than a full rich mixture of 0.087.
WHAT IS THE BEST INDICATION OF WORN VALVE GUIDES? low oil pressure low compression high oil consumption.
WHICH OF THE FOLLOWING ENGINE VARIABLES IS THE MOST CRITICAL DURING TURBINE ENGINE OPERATION? compressor inlet air temperature turbine inlet temperature compressor RPM.
WHAT IS THE POSITION OF THE COWL FLAPS DURING ENGINE STARTING AND WARMUP OPERATIONS UNDER NORMAL CONDITIONS? full closed at all times full open at all times open for starting closed for warmup.
WHAT IS THE PURPOSE OF THE LAST CHANCE OIL FILTERS? to assure a clean supply of oil to the lubrication system to filter the oil immediately before it enters the main bearings to prevent damage to the oil spray nozzle.
WHY IS IT UNNECESSARY TO FLASH THE FIELD OF THE EXCITER ON A BRUSHLESS ALTERNATOR? permanent magnets are installed in the main field poles brushless alternators do not have exciters the exciter is constantly charged by battery voltage.
THE PURPOSE OF THE FLOW CONTROL VALVE IN A RECIPROCATING ENGINE OIL SYSTEM IS TO: direct oil through or around the oil cooler deliver cold oil to the hopper tank compensate for volumetric increases due to foaming of the oil.
ENGINE OPERATING FLEXIBILITY IS THE ABILITY OF THE ENGINE TO: deliver maximum horsepower at a specific altitude meet exacting requirements of the efficiency and low weight per horsepower ratio run smoothly and give the desired performance at all speeds.
A FUEL OR OIL FIRE IS DEFINED AS A: class A fire class C fire class B fire.
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? horizontal vertical harmonic.
WHICH TWO ELEMENTS MAKE UP THE AXIAL FLOW COMPRESSOR ASSEMBLY? stator and diffuser rotor and stator compressor and manifold.
WHAT IS THE FUNCTION OF A FIRE DETECTION SYSTEM? to discharge the powerplant fire extinguishing system at the origin of the fire to identify the location of a powerplant fire to activate a warning device in the event of a powerplant fire.
THE PRIMARY PURPOSE OF BAFFLES AND DEFLECTORS INSTALLED AROUND CYLINDERS OF AIR-COOLED AIRCRAFT ENGINES IS TO: increase the volume of air used to cool the engine force cooling air into close contact with all parts of the cylinders create a low pressure area aft of the cylinders.
WHAT MUST BE DONE AFTER THE FUEL CONTROL UNIT HAS BEEN REPLACED ON AN AIRCRAFT GAS TURBINE ENGINE? retrim the engine recalibrate the fuel nozzles perform a full power engine run to check fuel flow.
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