SIFT Practice Quiz (Online) with
Complete Solutions
The Phenomenon of a helicopter sinking into its own downwash is called - ANS-settling
with power
Maximum ground effect occurs during a hover up to a height equal to a ____ percent of
the main rotors diamater - ANS-100
Helicopter's experience efftranslatranslationaltionalective translational lift while
transitioning to forward flight at approximately _____ to _____ knots - ANS-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 - ANS-12
When a Helicopter engine ______, a clutch mechanism called a ________ - ANS-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
______ - ANS-mean chamber, rotational relative wind
The angle between the ____ of a rotor blade and its direction of motion relative to the
________ is the angle of attack (AOA), which is _____ angle - ANS-chord, plane of
rotation
For helicopters with a main rotor disk that spins counter-clockwise, the _____ airflow
speed happens when each blade reaches the _____ position. - ANS-maximum, three
o'clock
When the pilot wants the helicopter's nose to move left or right, he or she: - ANS-
Pushes on the corresponding pedal
Multi-engine helicopters have - ANS-A throttle lever for each engine
When the pilot pushes the cyclic forward - ANS-The main rotor disk tilts forward
Newton's Third Law of Motion applies to helicopters because - ANS-The Spinning main
rotor makes the aircraft try to spin in the opposite direction
Complete Solutions
The Phenomenon of a helicopter sinking into its own downwash is called - ANS-settling
with power
Maximum ground effect occurs during a hover up to a height equal to a ____ percent of
the main rotors diamater - ANS-100
Helicopter's experience efftranslatranslationaltionalective translational lift while
transitioning to forward flight at approximately _____ to _____ knots - ANS-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 - ANS-12
When a Helicopter engine ______, a clutch mechanism called a ________ - ANS-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
______ - ANS-mean chamber, rotational relative wind
The angle between the ____ of a rotor blade and its direction of motion relative to the
________ is the angle of attack (AOA), which is _____ angle - ANS-chord, plane of
rotation
For helicopters with a main rotor disk that spins counter-clockwise, the _____ airflow
speed happens when each blade reaches the _____ position. - ANS-maximum, three
o'clock
When the pilot wants the helicopter's nose to move left or right, he or she: - ANS-
Pushes on the corresponding pedal
Multi-engine helicopters have - ANS-A throttle lever for each engine
When the pilot pushes the cyclic forward - ANS-The main rotor disk tilts forward
Newton's Third Law of Motion applies to helicopters because - ANS-The Spinning main
rotor makes the aircraft try to spin in the opposite direction
