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15/7/8

15/7/8
24問 • 1年前
  • Guevara Official
  • 通報

    問題一覧

  • 1

    Jet pipe function to

    clear exhaust from the airframe.

  • 2

    Cone function

    to shield turbine disc rear face and slow gases velocity.

  • 3

    Convergent nozzle Function .

    to optimize thrust at the outlet from the engine.

  • 4

    Convergent divergent exhaust nozzle used to make max advantage of

    pressure thrust

  • 5

    Single Spool Engine is .

    the basic form and the earliest type of turbojet engine.

  • 6

    On jet engine the main task of exhaust system is to

    accelerate the airflow from the turbine to make thrust

  • 7

    In a low bypass engine cold air mixer located .

    at the last stage of the turbine.

  • 8

    Corrugation jet nozzle on some old jets used to

    reduce noise, by induce cooled air to mix with hot gases

  • 9

    Function used to

    slow down aircraft speed on ground.

  • 10

    Reverser Thrust used at power setting

    less than max due to structural limits (low power and low forward speed).

  • 11

    In turbo shaft engine and APU the maximum gas energy is extracted by

    the turbine.

  • 12

    Bucket thrust reverser used in

    pure jet and low by pass engine.

  • 13

    Thrust reversal has 3 levels of safety

    to prevent inadvertent operation of thrust reversal in commercial air transport.

  • 14

    Convergent nozzle become chocked when

    gas flow is mach1 at the exit

  • 15

    The purpose of a thrust reverser "

    to provide braking and directional control during emergencylandings back an aircraft out of a parking spot "power back

  • 16

    Bearings Used to .

    enable rotational or liner movement, while reducing friction and handling stress.

  • 17

    Main bearings used in gas turbine engines are

    roller or ball bearings

  • 18

    SEALS Function

    to stop whatever fluids is inside from leaking out.

  • 19

    made of labyrinth or carbon rubbing........

    material

  • 20

    Seals may use pressurized air ( ) or pressurized fluid ( ) to seal bearing housing.

    threaded seal & fluid labyrinth seal

  • 21

    Roller bearing can withstand

    radial load only.

  • 22

    Ball bearing can with stand

    radial and simultaneously also axial force in both directions

  • 23

    bearings have to support

    engine weight and shaft elongation

  • 24

    After inspection, bearings are checked for the presence of magnetism with a device called a

    field detector.

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    問題一覧

  • 1

    Jet pipe function to

    clear exhaust from the airframe.

  • 2

    Cone function

    to shield turbine disc rear face and slow gases velocity.

  • 3

    Convergent nozzle Function .

    to optimize thrust at the outlet from the engine.

  • 4

    Convergent divergent exhaust nozzle used to make max advantage of

    pressure thrust

  • 5

    Single Spool Engine is .

    the basic form and the earliest type of turbojet engine.

  • 6

    On jet engine the main task of exhaust system is to

    accelerate the airflow from the turbine to make thrust

  • 7

    In a low bypass engine cold air mixer located .

    at the last stage of the turbine.

  • 8

    Corrugation jet nozzle on some old jets used to

    reduce noise, by induce cooled air to mix with hot gases

  • 9

    Function used to

    slow down aircraft speed on ground.

  • 10

    Reverser Thrust used at power setting

    less than max due to structural limits (low power and low forward speed).

  • 11

    In turbo shaft engine and APU the maximum gas energy is extracted by

    the turbine.

  • 12

    Bucket thrust reverser used in

    pure jet and low by pass engine.

  • 13

    Thrust reversal has 3 levels of safety

    to prevent inadvertent operation of thrust reversal in commercial air transport.

  • 14

    Convergent nozzle become chocked when

    gas flow is mach1 at the exit

  • 15

    The purpose of a thrust reverser "

    to provide braking and directional control during emergencylandings back an aircraft out of a parking spot "power back

  • 16

    Bearings Used to .

    enable rotational or liner movement, while reducing friction and handling stress.

  • 17

    Main bearings used in gas turbine engines are

    roller or ball bearings

  • 18

    SEALS Function

    to stop whatever fluids is inside from leaking out.

  • 19

    made of labyrinth or carbon rubbing........

    material

  • 20

    Seals may use pressurized air ( ) or pressurized fluid ( ) to seal bearing housing.

    threaded seal & fluid labyrinth seal

  • 21

    Roller bearing can withstand

    radial load only.

  • 22

    Ball bearing can with stand

    radial and simultaneously also axial force in both directions

  • 23

    bearings have to support

    engine weight and shaft elongation

  • 24

    After inspection, bearings are checked for the presence of magnetism with a device called a

    field detector.