13939560
Descripción
Test por Eduardo Diesel, actualizado hace más de 1 año
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Creado por Eduardo Diesel
hace más de 6 años
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Pregunta 1
Pregunta
Conventional gas turbine engines cannot perform as efficiently as the PW1100G-JM. The low compressor and low turbineare restricted to less-than- optimaloperating speeds so that…
Respuesta
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Fan can turn clockwise and LPT turn counterclockwise
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Fan and low rotor can operate at same dependent speeds for peak efficiency
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Fan speed can be maintained in a range most efficient for fan diameter
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It has an aerodynamic and protective enclosure for engine mounted components
Pregunta 2
Pregunta
Lightning strike protection in the inlet cowl is provided by…
Respuesta
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Line bars on both side of the outer barrel assembly
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An expanded copper screen layer impregnated into the outer barrel assembly
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Line bars into both side of the outer barrel assembly
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An expanded copper screen layer impregnated into the inner barrel assembly
Pregunta 3
Pregunta
What devices provide maintenance access to Thrust Reverser Torque Box?
Respuesta
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Fan cowl doors
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Oil Tank Access Door (OTAD)
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Thrust reverser cowl doors
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Door Opening System (DOS)
Pregunta 4
Pregunta
Strakes are mounted to the fan cowl outer surface to improve flight characteristics by controlling airflow. Where are these devices mounted?
Respuesta
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To outer side of each fan cowl doors.
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To outer side of each thrust reverser cowl doors
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To both the left and right fan cowl doors.
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To both the left and right thrust reverser cowl doors.
Pregunta 5
Pregunta
This mount reacts to engine fore-aft, side, vertical, and rolls loads. Which one?
Respuesta
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All tree mounts
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Thrust link
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Forward mount
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Aft mount
Pregunta 6
Pregunta
What is a term describing the engine modules that make up the primary path of airflow through the engine?
Respuesta
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Fan bypass air
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Gaspath configuration
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Engine rotor stages
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Engine aerodynamic stations
Pregunta 7
Pregunta
Bearing support the weight of engine parts and permit one surface to roll over another with minimal friction and wear. What loads withstand the tapered roller bearings?
Respuesta
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Both axial and radial loads
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Axial load perpendicular to the shaft
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Radial load parallel to the shaft
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Axial load parallel to the shaft only
Pregunta 8
Pregunta
How do we name bearing that use a thin film of oil between the outer race and the bearing support to reduce vibration?
Respuesta
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Lift-off seals
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Carbon face seals
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Tapered roller
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Oil-dampened
Pregunta 9
Pregunta
Some carbon face seals are called lift-off seals because extra air used to physically lift the seal off the ring during engine operation. Which bearing use this seal type?
Respuesta
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3
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1, 1.5 and 2
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4
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All 1, 1.5, 2, 3, 4, 5 and 6
Pregunta 10
Pregunta
What devices are installed beneath the fan blades to provide a radial preload of the blades, which also reduces fan rotor vibration?
Respuesta
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Front and rear lock rings
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Dovetail root
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Composite Teflon® wear strip
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Composite fan blade spacers
Pregunta 11
Pregunta
This is a component of the fan case assembly, which straighten and direct the fan discharge airstream. They supply structural support of flight and blade-out loads and also and provide radial support of the engine. Which one?
Respuesta
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Fan case
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FEGVs
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Fan exit liner segments
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Fan exit fairing and support.
Pregunta 12
Pregunta
In the FDGS, the star gear and the carrier to which they are attached do not move around the sun gear. The sun gear engages the star gears, moving them in a direction that causes the outer ring gear and fan to turn in the opposite direction from the sun gear and LPC/LPT, at a slower speed. What allows this design to increasing compressor efficiency?
Respuesta
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Hold both shafts to same speed.
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For higher fan speeds and lower LPC/LPT speed
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For lower fan speeds and higher LPC/LPT speed.
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Adjust the VIGVs for varying engine operating conditions
Pregunta 13
Pregunta
In the HPC there are eight HPC rotor tubes held in a ring. These tubes turn with the rotor and push air to the center of the rotor where this air can flow to where it is necessary for cooling and pressure balance.Where these tubes are located?
Respuesta
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At the outer case walls.
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Between the 7th and 8th stage rotors.
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Attached to the rear of the HPC rotor shaft.
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On the 2nd through 4th stage rotors
Pregunta 14
Pregunta
This mode permits the EEC to switch control of the fault loop to the standby channel, keeping control of the remaining functions with the original channel selected for that flight. Which mode is this?
Respuesta
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Passive mode
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Active/passive mode
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Active/standby mode
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Active/active mode
Pregunta 15
Pregunta
Core harnesses, designated as W or WC, are attached to…
Respuesta
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The right side of the engine core only.
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The left side of the fan case and the left and right side of the engine core.
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The left side of the engine core only.
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The left side of the engine core and the left and right side of the fan case.
Pregunta 16
Pregunta
Which sensor is used by the EEC to calculate engine inlet air pressure (P2) and to validate an independent air pressure reading from the aircraft?
Respuesta
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P2/T2 sensor
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Pamb sensor
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PS14 sensor
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P2 sensors
Pregunta 17
Pregunta
On the fuel distribution system, the main and servo pumps each have pressure relief valves that limit the developing absolute pressure to a pre-set design value. The valves are spring-loaded closed, opening when fuel pressure exceeds a predetermined limit. Fuel that flows past the pressure relief valves bypasses the fuel pump exit.Where this fuel is recirculated back to?
Respuesta
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Aircraft fuel tank
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Inlet to the pressure pump
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Ecology tank
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Fuel filter
Pregunta 18
Pregunta
This component supplies mounting and sealing of the IFPC, the fuel return pump, the Fuel Filter Differential Pressure (FFDP) sensor and the fuel filter housing assembly. It also transfers fuel between the components and serves as the connection point for external fuel lines. Which one?
Respuesta
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Fuel manifold
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Fuel filter assembly
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Flow divider valve (FDV)
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Fuel Control Module (FCM)
Pregunta 19
Pregunta
The Fuel Indicating System monitors fuel flow and sends messages to the flight deck display about the system status and possible fuel filter clogs.Which one IS NOT a component of this system?
Respuesta
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Fuel flow meter (FFM)
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IDGOOHE differential pressure sensor.
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Fuel Filter Differential Pressure Sensor (FFDP)
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Fuel Temperature Sensor (TF)
Pregunta 20
Pregunta
Each engine has two independent ignition systems designed for continuous operation. Normally the systems alternate, but they can be used simultaneously under some conditions.Which is one?
Respuesta
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When a first attempt to autostart the engine is required.
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When the aircraft is in takeoff mode.
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If surge or flameout is detected during takeoff or flight
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During airstart.
Pregunta 21
Pregunta
When using the Manual Start Ignition selection, the EEC energizes both igniters.Based on what logic and aircraft inputs?
Respuesta
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Thrust lever position.
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Wing anti-ice status.
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Continuous ignition commands
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Cockpit engine start selector switch position.
Pregunta 22
Pregunta
The starter incorporates a single stage turbine wheel, single piece output shaft, and a ratchet and pawl clutch. The starter gears and bearing are splash lubricated. Where these take oil from?
Respuesta
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ATS housing
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The MGB
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The AGB
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APU
Pregunta 23
Pregunta
The starter speed sensor detects the starter ring gear speed by detecting each tooth as it passes the tip of the magnetic probe. The teeth of the ring gear passing by the face of the magnet produce a change in the magnetic field. The time-varying electrical pulse signal is processed by the EEC and PHMU and converted to a rotational speed. How the EEC determine if the starter has failed?
Respuesta
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Opening of SAV after start.
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Shearing of starter drive shaft.
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Comparing this rotational speed with EEC input from Nf.
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Comparing this rotational speed with EEC input from N2
Pregunta 24
Pregunta
During engine operation, the EEC sends electrically isolated drive signals to the dual channel torque motor that is part of the LPC SVA. The drive signals direct pressurized fuel to either side of the actuator piston to achieve the commanded position. What happen if there is a loss of electrical power to the torque motor?
Respuesta
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The actuator positions the vanes in the full open fail safe position for maximum airflow through the HPC.
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The actuator positions the vanes in the full open fail safe position for maximum airflow through the LPC.
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The EEC positions the vanes in the full close fail safe position for maximum airflow through the LPC.
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The actuator positions the blades in the full open fail safe position for minimum airflow through the HPC.
Pregunta 25
Pregunta
This component provides discrete (on/off) control of HPC 3rd Stage servo pressure sent to the HPC active bleed air valve. Which one?
Respuesta
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2.5 bleed valve air transducer
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2.5 bleed valve air solenoid
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HPC Active Solenoid Valve
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LPC Active Solenoid Valve
Pregunta 26
Pregunta
The Turbine Cooling Air (TCA) System provides continuous cooling air to the High Pressure Turbine, and to the Turbine Intermediate Case/ Low Pressure Turbine. Which is one engine part cooled by this system?
Respuesta
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High Pressure Turbine 2nd Stage vanes between the 1st and 2nd stage rotors.
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HPT 3rd Stage blade attachment.
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Compressor Intermediate Case (CIC) fairings
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HPC rotor and blade attachments
Pregunta 27
Pregunta
This system cools the No. 4 Bearing compartment by sending 3rd Stage high compressor bleed air through the Buffer Air Heat Exchanger.Which one?
Respuesta
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The Turbine Cooling Air System.
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The bearing ventilation system
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The buffer cooling system.
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The active clearance control system.
Pregunta 28
Pregunta
On N1 speed sensor, each time one of the teeth passes the N1 speed sensor, a change occurs in the magnetic field. The change produces a signal frequency that the EEC will use to calculate an N1 speed proportional to the coupling’s rotational speed. The short tooth will cause a different frequency. Which is used this frequency to?
Respuesta
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Show overspeed.
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Locate zero degree for N1 trim balance purposes.
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Locate zero degree for Fan trim balance purposes
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Locate right hand position for Fan trim balance purposes.
Pregunta 29
Pregunta
Where the Cold Junction Compensation (CJC) used by the EEC to compute Exhaust Gas Temperature is located?
Respuesta
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Into the Main Oil Pressure sensor.
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On the EEC
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At the Main Oil Temperature sensor
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On the four probes
Pregunta 30
Pregunta
This system makes the path for the turbine gases exiting the engine core. It gives direction to the turbine gases, which helps to increase thrust and reduce turbulence. Which one?
Respuesta
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Turbine Exhaust System
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Thrust Reverser System
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Translating sleeve
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Inner Fixed structure (IFS)
Pregunta 31
Pregunta
What component provides thrust reverser support and protects the engine’s core cases and externals and forms the inner surface of the duct for fan bypass air?
Respuesta
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Turbine Exhaust System
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Thrust Reverser System
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Translating sleeve
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Inner Fixed structure (IFS)
Pregunta 32
Pregunta
Which System of the thrust reverser is used to limit the deflection of the fixed structure, and to maintain the structural integrity in the event of a burst air duct?
Respuesta
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Latch beams
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Closure Assist Assembly
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Bifurcation Latching
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Torque box assembly
Pregunta 33
Pregunta
This component of the thrust reverser actuation system (TRAS) provides a path for hydraulic system pressure to be ported from the Hydraulic Control Unit to the TRAS actuators. Which one?
Respuesta
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T-piece manifold
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Closure Assist Assembly
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Bifurcation Latching
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Track Lock Valve
Pregunta 34
Pregunta
What device on the oil system prevents engine operation without a filter installed?
Respuesta
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A small spring-loaded metal tab.
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An inlet shutoff valve.
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A differential pressure sensor.
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An oil filter bypass valve.
Pregunta 35
Pregunta
Maximum oil flow to lubricate the gear faces of the FDGS is required only at take-off. At cruise, oil flow is reduced and sent back to the oil tank. Less oil flowing to the gears reduces the oil heat load and increases fan drive gearbox efficiency. When in the fail safe position the valve reverts to maximum oil flow.Which valve allows the diversion of supply oil from the FDGS to the oil tank controlled by the EEC?
Respuesta
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ADSOV
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JOSV
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VORV
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FOHEBV
Pregunta 36
Pregunta
Which valve controls and distributes oil flow between the Fuel/Oil Heat Exchanger and the Air/Oil Heat Exchanger controlled by the EEC?
Respuesta
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ADSOV
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JOSV
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VORV
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FOHEBV
Pregunta 37
Pregunta
In the auxiliary lubrication system, on what event the windmill/auxiliary pump draws oil through the compartment sump, which is continually replenished by oil cast off from the gear system and main shaft bearings?
Respuesta
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In normal conditions
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In low pressure conditions
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During windmill operations
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During zero or negative gravity events
Pregunta 38
Pregunta
This assembly keeps the auxiliary oil pump gear turning in the same direction during windmill conditions, regardless of the direction in which the fan shaft turns. Which one?
Respuesta
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Auxiliary oil reservoir
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Anti-siphon tube
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Tertiary latching
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Sprag clutch gear assembly
Pregunta 39
Pregunta
In hot conditions, oil flows from the IDG to the core of the Oil/Oil Heat Exchanger, transferring heat. This usually occurs when the engine is at idle and the generator oil system is hotter than the engine oil system. 2. In normal conditions, heat is transferred to the IDG oil from the engine oil. The oil continues downstream to the IDG Fuel/Oil Heat Exchanger, where more cooling may take place. Of the mentioned statement:
Respuesta
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Only 1. Is true
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Only 2. Is true
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Both 1. And 2. are true
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Both 1. And 2. are false
Pregunta 40
Pregunta
In the nacelle anti-ice protection system, the upper and lower PRSOVs are not interchangeable. A valve clocking feature distinguishes the ducts on the upper and lower valve types, preventing incorrect installation.Why these valves cannot be interchanged?*
Respuesta
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Are different in size.
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Due to regulating pressure differences.
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They have NAI duct clocking features.
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One has a NAI remote solenoid
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