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SIFT Practice Quiz (Online) Exam – Questions and Answers
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SIFT Practice Quiz (Online) Exam –Questions and Answers
The Phenomenon of a helicopter sinking into its own downwash is called - -
settling with power
-Maximum ground effect occurs during a hover up to a height equal to a ____
percent of the main rotors diamater - -100
-Helicopter's experience efftranslatranslationaltionalective translational lift
while transitioning to forward flight at approximately _____ to _____ knots - -
16, 24
-Because of gyroscopic precession, if a wind gust applies a downward force
on the left side of a helicopters main rotor disk as it spins clockwise (as
viewed from above), the movement response occurs at the ___ o'clock
position - -12
-The ___ region is normally between a blade's ___ and ____ regions - -driving,
stall, driven
-The driven region is ____ the blade tips and normally ___ percent of the
radius - -nearest, 30
-If left uncorrected, greater lift produced by the advancing side of the rotor
disk compared to the lift created by the disk's retreating side could make the
helicopter _____ - -uncontrollable
-centrifugal force ____ spinning helicopter main rotor blades _____ - -pulls,
outward
-During an autorotation in forward flight, the rotator dis takes in ____ air and
the driven, driving, and stall regions of each blade move (span), but only on
the ____ side of the disk - -upward flowing, outward retreating
-When a Helicopter engine ______, a clutch mechanism called a ________ - -
fails; freewheeling unit automatically disconnects the engine from the main
rotor, allowing it to spin freely
-The angle of incidence is between the ______ line of each blade and the
rotor systems ______ - -mean chamber, rotational relative wind
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