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What are the major assemblies of the turboprop engine?
reduction gear assembly, torquemeter assembly, and power section assembly
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Which of the following is a subassembly of the turboprop engine?
the turbine
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The torquemeter measures the shaft power output of what engine component?
power unit
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The torquemeter operates on the principle of accurate measurement of...
torsional deflection
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What is another name for inch-pounds of torque?
shaft horsepower
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In the special shafting assembly of the torquemeter, where is the reference shaft connected to the torque shaft?
at the drive input end
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What is the purpose of the propellor reduction gearing?
to reduce the power section rpm
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How many stages of reduction are in the reduction gear assembly?
two
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What does the thrust-sensitive signal actuate?
propellor feather lever
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Which of the following operating conditions does NOT reflect normal functioning of the negative torque signal system?
power loss during takeoff
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For what reason is the safety coupling installed in the turboprop power train?
to disconnect the prop when excessive negative torque is encountered
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Transfer of torque between the power section and the reduction gear assembly must be transmitted through what propellor component?
safety coupling
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Whether the torque is positive or negative depends upon the relationship between which of the following components?
power section and prop
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The propellor brake is designed to decrease the time for the propellor to come to a complete stop after engine shutdown and to prevent which of the following actions?
windmilling when feathered in flight
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What are the three positions of the prop brake?
released, applied, locked
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The friction cone-type propeller brake consists of which of the following members?
a stationary inner member and a rotating outer member
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Regardless of the power lever setting during flight, a predetermined schedule automatically governs the...
propellorr blade angle and fuel flow
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The ground handling range is also called the...
beta range
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Which of the following factors controls prop blade angle in the beta range?
power levers
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By what means does the turboprop fuel control differ from the turbojet fuel control?
the turboprop fuel control operates with a propellor governor
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Blade station
reference line , designated measurement, made from the hub
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Blade
One arm of a prop from the butt to the tip
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Blade face
The surface of the blade seen by standing directly behind the aircraft
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Tip
The part of the blade farthest from the hub
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Shank
The thick part of the blade near the hub of the prop
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Blade back
The surface of the blade seen by standing in front of the aircraft
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Leading edge
The forward or cutting edge of the blade
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Blade angle (pitch)
The angle formed by the chord of a section of the blade and a plane perpendicular to the axis of rotatioin
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Propellor retaining nut.
The nut that locks the hub to the prop shaft
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Hub.
The central part of the prop fitted into the prop shaft
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Of the 54H60-77 designation what indicates the number of changes in the prop?
5
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Of the 54H60-77 designation what shows the number of blades?
4
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Of the 54H60-77 designation what describes the blade shank size and makeup?
H
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Which force tries to rotate the blades in the hub to increase the blade angle?
aerodynamic twisting moment
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Which forces tends to pull blades of the spinning prop from its hub?
centrifugal
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Which force tends to bend blade tips forward?
thrust bending
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What is the primary function of a prop system?
to increase or decrease pitch as required by power lever movement
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Which of the following components of the barrel assembly is/are kept together throughout the service life of the prop?
front and rear barrel sections
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Which of the following barrel components carry the high centrifugal blade loads?
barrel shoulders and lips
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The barrel assembly contains what total number of cone types?
two
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The 54H560-77 prop blades are forged from what material(s)?
solid aluminum alloy only
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The blade heater assembly is bonded to what part of the blade?
the leading edge of the blade fairing
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What condition requires blade heater assembly replacement?
when more than four wires of the heater assembly are damaged
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What is the blade angle changing mechanism of the prop system?
dome assembly
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The prop stationary and rotating cams are a part of what system?
dome assembly
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The low pitch stop assembly is mounted to what other assembly?
dome assembly
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The ratchet rings in the pitchlock regulator assembly are held apart by..
hydraulic pressure
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When pitchlock occurs, what device prevents a decrease in the blade angle?
the ratchet rings
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During pitchlock the prop is limited to which of the following conditions?
operates as fixed pitch prop
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What are the two major parts of the 54H60-77 model prop control assembly?
the pump housing assembly and valve housing assembly
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The prop system is comprised of several assemblies, one of which is the pump housing. What is the location of the pump housing?
The lower part of the prop control assembly
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What total number of pumps are located in the pump housing assembly?
five
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Which of the following pumps in the pump housing assembly are driven by a common shaft?
the auxiliary main pump and auxiliary scavenge pump
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During static ground operations, what pump is used to feather and unfeather the prop?
the feather pump
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The valve housing assembly controls what two ranges of operation?
the alpha and beta ranges
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What valve in the valve housing assembly directs pitch change hydraulic pressure to the dome assembly?
the pilot valve
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What component in the valve housing assembly opposes the flyweight centrifugal force?
the pilot valve
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The only approved way to remove damage from a blade is to use diemakers' rifflers and which of the following materials?
Aluminum oxide paper
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How many people are usually needed to remove a prop and place it on a dolly?
three
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What is the only position that allows you to remove the afterbody of a prop without damaging it or the prop blade?
max reverse
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In what position should the prop be cycled after the top and botton sections have been removed?
feather
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When removing or installing a prop, you should ensure that the No.1 blade is NEVER turned beyond what positive and what negative limits?
Minus 15 degrees and positive 100 degrees
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Which of the cleaning procedures is/are NOT permitted on internal prop parts?
Vapor blasting?
using paper or rags?
using PD-680?
Both 1 and 2 above
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