Rotary - Week 1
Which of the following elements is NOT a part of the helicopter powertrain?
Engine
Main Rotor
Free Wheeling Device
Swash Plate
Which of the following is NOT a type of engine installed on helicopters?
Normally aspirated Piston Engine
Turbojet Engine
Free-power Turboshaft Engine
Turbocharged Piston Engine
Which of the following factors determines where the manufacturer locates the engine(s) on a helicopter?
Appearance
Weight and Balance Requirements
Cowl design
There are no determining factors
Which of the following factors determines where the manufacturer locates the engine(s) on a helicopter?
Appearance
Classification of Main Rotor System
Cowl design
Space Limitations
What is the positioning and interconnect of the engine and transmission on the Robinson R22 helicopter disused?
The engine is mounted on an angle in the nose of the aircraft and inked to the transmission located behind and above the pilots with a shaft running from the engine to the transmission between the pilots
The engine is mounted vertically with the transmission attached directly to and driven by the output end of the engine
The engine is mounted horizontally below the transmission and linked to the transmission drive using drive belts
The engine is mounted vertically beside the transmission and linked to the transmission drive using drive belts
What type of engine is the Allison 250-C20?
A free compressor turbine turboshaft engine
A free power turbine turboshaft engine
A free power turbine turbo-prop engine
A single shaft turboshaft engine
Which of the following drives the output shaft?
The compressor turbine
The gas producer turbine
The compressor
The power turbine
What is the acronym used to describe the speed of the Gas Producer or Compressor Turbine?
S1
S2
N1
N2
What type of coupling is used to join the pairs of Compressor or Power turbine wheels together?
Curvic coupling
Dove tail coupling
Fur tree coupling
Flange mount coupling
What is the type of gear attached to the Power Turbine to drive the gearbox?
Helical cut gear
Straight cut spur gear
Bevel cut gear
Planetary cut gear
Which of the following is a device driven by the gas producer turbine system?
N2 Tachometer Generator
Starter/Generator
Splined Output Shaft
Freewheeling Unit
Which of the following is a device driven by the power turbine system?
Starter/Generator
Freewheeling Unit
N1 Tachometer Generator
Engine Driven Fuel Pump
How is the speed of the turbine wheels measured on the instrument?
In actual revolutions per minute (RPM)
In the fraction of the maximum speed (7/8 ths)
In cycles per minute (Hz)
In percentage of maximum speed (80%)
Which of the following elements is NOT a part of the helicopter powertrain?
Engine
Collective Control
Gearboxes
Drive Shafts
Which of the following is NOT a type of engine installed on helicopters?
Normally aspirated piston engine
Free-power turboshaft engine
Turbofan engine
Turbocharged Piston Engine
Where are the engines located on a helicopter?
In front or forward of the main rotor gearbox
Below the main rotor gearbox
It depends upon weight and balance requirements
Behind or aft of the main rotor gearbox
Where are the engines located on a helicopter?
It depends upon space limitations
In front or forward of the main rotor gearbox
Below the main rotor gearbox
Behind or aft of the main rotor gearbox
What is the positioning and interconnect of the engine and transmission on the Bell 47 helicopter disused?
The engine is mounted horizontally with the transmission attached directly to and driven by the output end of the engine
The engine is mounted vertically with the transmission attached directly to and driven by the output end of the engine
The engine is mounted horizontally below the transmission and linked to the transmission drive using drive belts
The engine is mounted vertically beside the transmission and linked to the transmission drive using drive belts
What is the positioning and interconnect of the engine and transmission on the Sikorsky S-58 helicopter disused?
The engine is mounted on an angle in the nose of the aircraft and inked to the transmission located behind and above the pilots with a shaft running from the engine to the transmission between the pilots
The engine is mounted vertically with the transmission attached directly to and driven by the output end of the engine
The engine is mounted horizontally below the transmission and linked to the transmission drive using drive belts
The engine is mounted vertically beside the transmission and linked to the transmission drive using drive belts
Why does the Aerospatiale Alouette or Gazelle require some form of centrifugal clutch in order to aid the starting process?
The starter motor drives a flywheel that engages through a centrifugal clutch to the engine once it reaches a certain speed to turn the engine
The centrifugal clutch disconnects the engine from the transmission and rotor system during the start sequence due to the fixed or single shaft turboshaft engine design
The centrifugal clutch disconnects the engine from the transmission and rotor system during the start sequence due to the free power turbine turboshaft engine design
The centrifugal clutch disconnects the engine from the transmission and rotor system during the start sequence due to the radial type piston engine installed
How many stages of turbine drive the compressor?
1
2
3
4
What is the acronym used to describe the speed of the Gas Producer turbine?
S1
S2
N1
N2
What is the acronym used to describe the speed of the Power turbine?
S1
S2
N1
N2
What type of coupling is used to join the pairs of turbine wheels together?
Curvic coupling
Dove tail coupling
Fur tree coupling
Flange mount coupling
When looking at the airflow through the Allison 250-C20 Engine, which device is positioned closest to the front in the gas path of the air flow through the engine?
Power Turbine
Compressor Turbine
Combustion Chamber
Centrifugal Compressor
What is the acronym used to describe the speed of the main rotor in the Bell 206 helicopter
Sr
N1
Nr
N3
Which of the following is a device driven by the gas producer turbine system?
Fuel Control Unit
Nr Governor
Splined Output Shaft
Freewheeling Unit
Which of the following is a device driven by the gas producer turbine system?
N2 Tachometer Generator
Nr Governor
Engine Driven Fuel Pump
Freewheeling Unit
Which of the following is a device driven by the gas producer turbine system?
N2 Tachometer Generator
Nr Governor
Splined Output Shaft
N1 Tachometer Generator
Which of the following is a device driven by the gas producer turbine system?
N2 Tachometer Generator
Internal Oil Pump
Nr Governor
Splined Output Shaft
What is the type of gear attached to the Gas Producer Turbine to drive the gearbox?
Helical cut gear
Straight cut spur gear
Bevel cut gear
Planetary cut gear
Which of the following is a device driven by the power turbine system
Starter/Generator
Splined output Shaft
N1 Tachometer Generator
Engine Driven Fuel Pump
Which of the following is a device driven by the power turbine system
Nr Governor
Fuel Control Unit
Engine Driven Fuel Pump
N1 Tachometer Generator
Which of the following is a device driven by the power turbine system
Starter/Generator
Fuel Control Unit
N2 Tachometer Generator
Engine Driven Fuel Pump
What is the first spinning component in the helicopter powertrain?
The Main Rotor
The Mast and Swashplate
The Power Turbine in the engine
The Transmission Driveshaft
What causes the Power Turbine to spin?
The physical connection to the gas producer turbine
Hot expanding gasses from burning the fuel
The starter/generator
The air flow down through the Main Rotor System
What does N stand for?
RPM
SPM
S1
S2
What type of gear trains does an N2 system use?
Helical type gears
Spur type gears
Bevel cut gear
Planetary cut gear
What type of gear train does an N1 system use?
Helical cut gear
Spur type gears
Bevel cut gear
Planetary cut gear
What kind of gear is this?
Straight bevel gear
Helical cut gear
Planetary cut gear
Spur type gear
What kind of gear is this?
Face gear
Bevel Gear
Spur or Straight Gear
Spiral Bevel Gear
What kind of gear is this?
Worm gear
Face Gear
Bevel Gear
Spiral Bevel Gear
What kind of gear is this?
Helical cut gear
Straight cut spur gear
Bevel cut gear
Planetary cut gear
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