SIFT Army Aviation Information Practice Test questions and answers verified and updated.

SIFT Army Aviation Information Practice Test questions and answers verified and updated 2023. A helicopter is - correct answers.A type of rotorcraft Helicopter turbine engines produce ___________ thrust per pound than piston engines - correct answers.More The four main forces working on a helicopter are - correct answers.Lift, weight, thrust, drag Helicopters typically have between ___ and ___ main rotor blades - correct answers.2 and 6 Depending on the type of helicopter, main rotor system components can include - correct answers.A stabilizer bar, upper/lower swashplates, counterweights, pitch horns, teeter/coning hinges, blade grips, pitch/scissor links, control rods The function of the flybar is - correct answers.To decrease crosswind thrust on the blades and enhance flight stability by keeping the bar stable as the rotor spins Many helicopters have a horizontal stabilizer located _____ - correct answers.On the tail boom The purpose of the tail rotor is: - correct answers.To produce an anti-torque force acting perpendicular to the helicopter's longitudinal axis. Wheels on _____ types of helicopters are _____ - correct answers.Some, retractable A pilot controls a helicopter using: - correct answers.Pedals, a collective, throttle, cyclic From a physics perspective, the _____ force is deemed to act through a helicopter's _____ - correct answers.Total weight, center of gravity When a pilot banks a helicopter, causing it to turn, _____ - correct answers.The machine's weight increases In the case of helicopters, lift is produced by _____ moving through the air at a speed sufficient to create - correct answers.Airfoils, a pressure differential Thrust acts _____ to the aircraft's _____ - correct answers.Parallel, longitudinal axis Profile drag consists of - correct answers.Profile drag is usually defined as the sum of form drag(Shape of the object) and skin friction(imperfections) Vortices produced by spinning rotor blades create - correct answers.Induced drag When plotted on a graph, L/DMAX is the point where the helicopter's _____ - correct answers.Total lift-to-drag ration is the greatest A helicopter's potential energy is affected by - correct answers.The aircraft's height above the ground Which of the following factors affect the lift produced by spinning rotor blades - correct answers.Airfoil coefficient of lift, air density, blade area What happens when a helicopter's main rotor blades spin rapidly? - correct answers.The upper and lower sides of each blade experience a difference in pressure Newton's third law of motion applies to helicopters because - correct answers.The spinning main rotor makes the aircraft try to spin in the opposite direction When the pilot pushes the cyclic forward - correct answers.The main rotor disk tilts forward Multi-engine helicopters have - correct answers.A throttle lever for each engine When the pilot wants the helicopter's nose to move left or right he - correct answers.Pushes on the corresponding pedal For helicopters with a main rotor disk that spins counter-clockwise, the _____ airflow speed happens when each blade reaches the _____ position. - correct answers.Maximum/ three o'clock (right) On the advancing rotor blade, lift _____ and the blade _____ - correct ases, moves upward