Questions and Correct Answers | Graded A+ | Latest
version (Just Released)
Increasing collective (power) while maintaining constant airspeed will cause the
helicopter to
(a) climb
(b) descend
(c) pitch nose-up sharply
(d) pitch nose-down sharply
(e) autorotate ---------CORRECT ANSWER-----------------(a) climb
Profile drag, developing from the frictional resistance of the blades passing
through the air, does not change significantly with the airfoil's angle of attack, but
(a) increases proportionately when airspeed increases
(b) increases significantly when airspeed increases
(c) increases moderately when airspeed increases
(d) decreases moderately when airspeed increases
(e) decreases significantly when airspeed increases ---------CORRECT ANSWER-------
----------(c) increases moderately when airspeed increases
Induced drag is generated by
(a) profile drag and skin friction
,(b) the high-pressure above the blade
(c) the low-pressure area below the blade
(d) vortices at the rotor's trailing edge and tips
(e) airflow circulation around the rotor blade as it creates lift ---------CORRECT
ANSWER-----------------(e) airflow circulation around the rotor blade as it creates lift
A rotor blade's angle of attack (AOA) is
(a) usually lower at higher airspeeds and higher at lower airspeeds
(b) usually higher at higher airspeeds and lower at lower airspeeds
(c) a function of the power applied to the antitorque rotor
(d) always the same relative to the rotor mast
(e) a function of induced drag vortices ---------CORRECT ANSWER-----------------(a)
usually lower at higher airspeeds and higher at lower airspeeds
Airfoils are used to produce lift, as well as
(a) thrust or propulsion
(b) control, blade twist, and counteracting dissymmetry of lift
(c) stability, control, and thrust or propulsion
(d) stability, thrust, and facilitating torque
(e) stability, control, and radial engine cooling ---------CORRECT ANSWER-------------
----(c) stability, control, and thrust or propulsion
,On a helicopter, a governor is a device that
(a) is found only on piston-engine helicopters
(b) senses main and tail rotor RPM's and makes adjustments to keep torque
balanced
(c) senses rotor and engine RPM's and makes adjustments to keep rotor RPM's
constant
(d) senses rotor and engine RPM's and adjusts to keep engine RPM's constant
(e) governs the pitch angle on the main rotor blades ---------CORRECT ANSWER-----
------------(c) senses rotor and engine RPM's and makes adjustments to keep rotor
RPM's constant
On a typical helicopter airspeed indicator a green arc indicates the aircraft's
(a) airspeed limit beyond which structural damage could occur
(b) normal operating speed range
(c) maximum safe autorotation speed
(d) maximum continuous power setting
(e) normal altitude operating range ---------CORRECT ANSWER-----------------(b)
normal operating speed range
More power is required during ______ than any other helicopter flight regime.
(a) takeoff
(b) landing
(c) transitional flight
(d) hovering
, (e) autorotation ---------CORRECT ANSWER-----------------(d) hovering
The three major factors that affect helicopter performance are
(a) pressure altitude, center of gravity, and wind
(b) density altitude, weight, and wind
(c) density altitude, weight, and relative airspeed
(d) altitude above ground, center of gravity, and airspeed
(e) humidity, weight, and relative airspeed ---------CORRECT ANSWER-----------------
(b) density altitude, weight, and wind
The four fundamentals of flight--on which all maneuvers are based--are
(a) hovers, turns, climbs, and descents
(b) hovers, climbs, descents, and autorotation
(c) straight-and-level flight, turns, climbs, and descents
(d) straight-and-level flight, climbs, descents, and autorotation
(e) horizontal flight, vertical flight, yaws, and pitches ---------CORRECT ANSWER-----
------------(c) straight-and-level flight, turns, climbs, and descents
Airspeed in straight-and-level flight is determined by the
(a) RPM's of the main rotor
(b) forward-tilting attitude of the rotor disk relative to the horizon
(c) rear-tilting attitude of the rotor disk relative to the horizon