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SIFT ARMY AVIATION INFORMATION PRACTICE EXAM
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SIFT ARMY AVIATION INFORMATIONPRACTICE EXAM 2024-2025
A helicopter is often made up of a ______ (fill in the blank) with a ____ (fill in
the blank) jutting upward. - ANSWER: Fuselage (the craft's body), mast.
The craft's engine sends power upward through the ____ (fill in the blank) to the
rotor blades, which the pilot controls. - Mast's Answer
This main rotor generates ____ (fill in the blank). - ANSWER Thrust.
____ (fill in the blank) is balanced by a second rotor, usually a tail rotor, which
is designed to counteract the effects of ____. - ANSWER Thrust and Torque.
What are the two major types of aircraft? - ANSWER: Rotorcraft and Fixed
Wing.
The primary advantage of a helicopter over an airplane is its ability to take off
____ (fill in the blank). It may also ____ (fill in the blank). This means that
helicopters can take off and land in areas that planes cannot reach. They can
also drop cargo or troops into difficult places. - Hover and answer vertically.
What are the many helicopter types? - ANSWER: Single main rotor, tandem
rotor, and coaxial rotor.
This is the most typical helicopter design: a ____ (fill in the blank) rotor that
generates power, with a secondary rotor, such as a tail rotor, to counteract the
effects of torque. One downside of this design is that some of the power is used
to counteract ____ (fill in the blank), rather than for lift. - ANSWER: A single
main rotor with torque.
This helicopter's design includes two primary rotating blade sections: front and
rear. The torque is automatically offset since each set of blades rotates in the
opposite direction. Torque can be dealt with without the use of additional
measures like a tail rotor. As a result, the engine's full power can be employed
, for lifting. As a result, ____ (fill in the blank) helicopters are among the world's
fastest and most powerful. - Tandem Rotor Helicopter.
This type of helicopter has two sets of blades that rotate above and below each
other. The two sets of blades are attached on the same mast, although they rotate
in opposite directions. This has the advantage of decreasing ____ (fill in the
blank), resulting in increased freight and passenger capacity. - ANSWER:
Coaxial Rotor Helicopter, Payload.
The helicopter's engine (or engines) produces ____ (fill in the blank). It is set in
action by the ____ (fill in the blank) and ____. Sufficient ____ (fill in the blank)
is required to overcome the helicopter's drag and weight and propel it ahead. -
ANSWER: Mast and Rotors, Thrust.
____ (fill in the blank) is a force that works against push. Drag in helicopters
occurs when the shape and size of the aircraft disrupts the flow of air as it flies.
There are various forms of ____ (fill in the blank) that affect helicopters. Drag
is the answer.
What are the four types of drag? - ANSWER Profile drag, induced drag,
parasitic drag, and total drag.
____ (fill in the blank) is created by the frictional resistance of helicopter blades
in flight. - Drag the ANSWER Profile.
What are the two sub-components of Profile Drag? - ANSWER: Form drag and
skin friction.
____ (fill in the blank) increases in proportion to the helicopter's speed. - Drag
the ANSWER Form.
____ (fill in the blank) is created by microscopic roughness on the helicopter
blades. Any roughness on the surface traps air, increasing drag. - ANSWER:
Skin friction.
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