SIFT Army Aviation Information UPDATED
ACTUAL Exam Questions and CORRECT
Answers
A helicopter is - CORRECT ANSWER - A type of rotorcraft
Helicopter turbine engines produce ___________ thrust per pound than piston engines -
CORRECT ANSWER - More
The four main forces working on a helicopter are - CORRECT ANSWER - Lift, weight,
thrust, drag
Helicopters typically have between ___ and ___ main rotor blades - CORRECT
ANSWER - 2 and 6
Depending on the type of helicopter, main rotor system components can include - CORRECT
ANSWER - 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 ANSWER - 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 ANSWER - On
the tail boom
The purpose of the tail rotor is: - CORRECT ANSWER - To produce an anti-torque force
acting perpendicular to the helicopter's longitudinal axis.
Wheels on _____ types of helicopters are _____ - CORRECT ANSWER - Some,
retractable
, A pilot controls a helicopter using: - CORRECT ANSWER - Pedals, a collective, throttle,
cyclic
From a physics perspective, the _____ force is deemed to act through a helicopter's _____ -
CORRECT ANSWER - Total weight, center of gravity
When a pilot banks a helicopter, causing it to turn, _____ - CORRECT ANSWER - 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 ANSWER - Airfoils, a pressure differential
Thrust acts _____ to the aircraft's _____ - CORRECT ANSWER - Parallel, longitudinal
axis
Profile drag consists of - CORRECT ANSWER - 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 ANSWER - Induced drag
When plotted on a graph, L/DMAX is the point where the helicopter's _____ - CORRECT
ANSWER - Total lift-to-drag ration is the greatest
A helicopter's potential energy is affected by - CORRECT ANSWER - The aircraft's height
above the ground
Which of the following factors affect the lift produced by spinning rotor blades - CORRECT
ANSWER - Airfoil coefficient of lift, air density, blade area
ACTUAL Exam Questions and CORRECT
Answers
A helicopter is - CORRECT ANSWER - A type of rotorcraft
Helicopter turbine engines produce ___________ thrust per pound than piston engines -
CORRECT ANSWER - More
The four main forces working on a helicopter are - CORRECT ANSWER - Lift, weight,
thrust, drag
Helicopters typically have between ___ and ___ main rotor blades - CORRECT
ANSWER - 2 and 6
Depending on the type of helicopter, main rotor system components can include - CORRECT
ANSWER - 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 ANSWER - 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 ANSWER - On
the tail boom
The purpose of the tail rotor is: - CORRECT ANSWER - To produce an anti-torque force
acting perpendicular to the helicopter's longitudinal axis.
Wheels on _____ types of helicopters are _____ - CORRECT ANSWER - Some,
retractable
, A pilot controls a helicopter using: - CORRECT ANSWER - Pedals, a collective, throttle,
cyclic
From a physics perspective, the _____ force is deemed to act through a helicopter's _____ -
CORRECT ANSWER - Total weight, center of gravity
When a pilot banks a helicopter, causing it to turn, _____ - CORRECT ANSWER - 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 ANSWER - Airfoils, a pressure differential
Thrust acts _____ to the aircraft's _____ - CORRECT ANSWER - Parallel, longitudinal
axis
Profile drag consists of - CORRECT ANSWER - 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 ANSWER - Induced drag
When plotted on a graph, L/DMAX is the point where the helicopter's _____ - CORRECT
ANSWER - Total lift-to-drag ration is the greatest
A helicopter's potential energy is affected by - CORRECT ANSWER - The aircraft's height
above the ground
Which of the following factors affect the lift produced by spinning rotor blades - CORRECT
ANSWER - Airfoil coefficient of lift, air density, blade area
