SIFT Army Aviation Information Section
UPDATED Exam Questions and
CORRECT Answers
A Helicopter - CORRECT ANSWER - Is a type of rotorcraft that is able to takeoff and
land vertically, hover, and fly forward, backward, and side to side (laterally).
Thrust engine - CORRECT ANSWER - an engine that produces power and delivers it to
overhead and tail rotors (on most helicopters) via one or more transmissions and drive shafts.
Fuselage - CORRECT ANSWER - Main Body of the helicopter
Mast - CORRECT ANSWER - Shaft protruding from the top
Cowling - CORRECT ANSWER - On the upper part of the fuselage of many helicopters,
it covers the aircrafts engine and transmission.
two to six rotor blade - CORRECT ANSWER - How many rotor blades are attached to the
mast via a rotor head?
Flybar - CORRECT ANSWER - also called a stabilizer bar.
upper and lower swashplates, blade grips, control rods, pitch and scissor links, teeter or coning
hinges, pitch horns, and counterweights - CORRECT ANSWER - Rotor systems consist of
what components?
enhance flight stability by keeping the bar stable as the rotor spins, and to reduce crosswind
thrust on the blades - CORRECT ANSWER - What is the Flybars Function?
,cyclic collective, throttle and pedals - CORRECT ANSWER - what are the pilot's flight
instruments and controls?
Avionics - CORRECT ANSWER - what are electronics used for navigation,
communications and aircraft systems term?
Weapons controls - CORRECT ANSWER - How does the pilot use weapons from a
military helicopter cockpit?
weight, lift, thrust, and drag - CORRECT ANSWER - what are the four aerodynamic
forces that act on a helicopter when it is airborne?
Lift - CORRECT ANSWER - what is the force that counteracts an aircrafts weight and
causes a helicopter to rise into the air and stay aloft.
Lift - CORRECT ANSWER - is produced by airfoils - rotor blades, in the case of
helicopters - that move through the air at a speed sufficient to create a pressure differential
between the two sides of the airfoils.
Thrust - CORRECT ANSWER - is an aircraft's forward force, which is created by one or
more engines, and is transformed in the case of helicopters into rotary motion via the
components mentioned. Generally, _______ acts parallel to the aircrafts longitudinal axis, but
not always.
Drag - CORRECT ANSWER - opposes thrust; it is a rearward- acting force caused by
airflow passing over the aircraft's structure and becoming disrupted. ________ acts parallel to
the relative wind.
Profile, induced and parasite - CORRECT ANSWER - what are the three types of drag?
Profile drag - CORRECT ANSWER - Drag created by the blades' frictional resistance
increases. Consists of skin friction created by surface imperfections and form drag.
, Induced drag - CORRECT ANSWER - Drag created by air circulating around each rotor
blade as it spins and creates lift; the circulation causes a vortex behind each blade.
Parasite drag - CORRECT ANSWER - Drag created by helicopter components and
attached equipment that do not contribute to lift, including the fuselage, tail section, skids or
wheels, externally mounted engines, sensors and weapons.
Bernoulli's Principle - CORRECT ANSWER - Scientific Principle that energy cannot be
created or destroyed- only its form can be changed - and a system's total energy does not increase
or decrease
Conservation of energy - CORRECT ANSWER - Bernoulli's principle is based off this. It
says that in a steady flow the sum of all forms of mechanical energy- a fluids potential energy
plus its kinetic energy - along a streamline is the same at all points.
Potential energy - CORRECT ANSWER - what kind of energy would be left in the
helicopter if it were airborne when it ran out of fuel?
Autorotation - CORRECT ANSWER - When the helicopter noses the helicopter down in
order to keep air flowing over the rotor blades. when the helicopters potential energy is
converted into kinetic energy.
Venturi Effect - CORRECT ANSWER - How spinning rotor blades can produce enough
force to lift a helicopter off the ground, climb and maintain a crushing altitude, and how a
moving tail rotor is able to generate a sideways, anti-torque force.
Newton's Third Law of motion - CORRECT ANSWER - "When one body exerts a force
on a second body, the second body simultaneously exerts a force equal in magnitude and
opposite in direction to that of the first body."
Counter-Clockwise direction, Clockwise direction - CORRECT ANSWER - Rotor blades
on helicopters designed and built in the United States, Canada, Britain, and Germany move in
UPDATED Exam Questions and
CORRECT Answers
A Helicopter - CORRECT ANSWER - Is a type of rotorcraft that is able to takeoff and
land vertically, hover, and fly forward, backward, and side to side (laterally).
Thrust engine - CORRECT ANSWER - an engine that produces power and delivers it to
overhead and tail rotors (on most helicopters) via one or more transmissions and drive shafts.
Fuselage - CORRECT ANSWER - Main Body of the helicopter
Mast - CORRECT ANSWER - Shaft protruding from the top
Cowling - CORRECT ANSWER - On the upper part of the fuselage of many helicopters,
it covers the aircrafts engine and transmission.
two to six rotor blade - CORRECT ANSWER - How many rotor blades are attached to the
mast via a rotor head?
Flybar - CORRECT ANSWER - also called a stabilizer bar.
upper and lower swashplates, blade grips, control rods, pitch and scissor links, teeter or coning
hinges, pitch horns, and counterweights - CORRECT ANSWER - Rotor systems consist of
what components?
enhance flight stability by keeping the bar stable as the rotor spins, and to reduce crosswind
thrust on the blades - CORRECT ANSWER - What is the Flybars Function?
,cyclic collective, throttle and pedals - CORRECT ANSWER - what are the pilot's flight
instruments and controls?
Avionics - CORRECT ANSWER - what are electronics used for navigation,
communications and aircraft systems term?
Weapons controls - CORRECT ANSWER - How does the pilot use weapons from a
military helicopter cockpit?
weight, lift, thrust, and drag - CORRECT ANSWER - what are the four aerodynamic
forces that act on a helicopter when it is airborne?
Lift - CORRECT ANSWER - what is the force that counteracts an aircrafts weight and
causes a helicopter to rise into the air and stay aloft.
Lift - CORRECT ANSWER - is produced by airfoils - rotor blades, in the case of
helicopters - that move through the air at a speed sufficient to create a pressure differential
between the two sides of the airfoils.
Thrust - CORRECT ANSWER - is an aircraft's forward force, which is created by one or
more engines, and is transformed in the case of helicopters into rotary motion via the
components mentioned. Generally, _______ acts parallel to the aircrafts longitudinal axis, but
not always.
Drag - CORRECT ANSWER - opposes thrust; it is a rearward- acting force caused by
airflow passing over the aircraft's structure and becoming disrupted. ________ acts parallel to
the relative wind.
Profile, induced and parasite - CORRECT ANSWER - what are the three types of drag?
Profile drag - CORRECT ANSWER - Drag created by the blades' frictional resistance
increases. Consists of skin friction created by surface imperfections and form drag.
, Induced drag - CORRECT ANSWER - Drag created by air circulating around each rotor
blade as it spins and creates lift; the circulation causes a vortex behind each blade.
Parasite drag - CORRECT ANSWER - Drag created by helicopter components and
attached equipment that do not contribute to lift, including the fuselage, tail section, skids or
wheels, externally mounted engines, sensors and weapons.
Bernoulli's Principle - CORRECT ANSWER - Scientific Principle that energy cannot be
created or destroyed- only its form can be changed - and a system's total energy does not increase
or decrease
Conservation of energy - CORRECT ANSWER - Bernoulli's principle is based off this. It
says that in a steady flow the sum of all forms of mechanical energy- a fluids potential energy
plus its kinetic energy - along a streamline is the same at all points.
Potential energy - CORRECT ANSWER - what kind of energy would be left in the
helicopter if it were airborne when it ran out of fuel?
Autorotation - CORRECT ANSWER - When the helicopter noses the helicopter down in
order to keep air flowing over the rotor blades. when the helicopters potential energy is
converted into kinetic energy.
Venturi Effect - CORRECT ANSWER - How spinning rotor blades can produce enough
force to lift a helicopter off the ground, climb and maintain a crushing altitude, and how a
moving tail rotor is able to generate a sideways, anti-torque force.
Newton's Third Law of motion - CORRECT ANSWER - "When one body exerts a force
on a second body, the second body simultaneously exerts a force equal in magnitude and
opposite in direction to that of the first body."
Counter-Clockwise direction, Clockwise direction - CORRECT ANSWER - Rotor blades
on helicopters designed and built in the United States, Canada, Britain, and Germany move in
