Space Mechanics MCQ
What is the definition of a spacecraft?
A large vehicle designed for carrying passengers
A vehicle used for exploring outer space
Any fabricated craft that is launched above earth's atmosphere
A device used to clean floors
Answer
Correct Answer:
Any fabricated craft that is launched above earth's atmosphere
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What is the order of the longest and shortest days of the year?
Solstices are the longest and shortest days of the year.
There is no set order to the longest and shortest days of the year.
Equinoxes are the longest and shortest days of the year.
Solstices are the shortest and longest days of the year.
Answer
Correct Answer:
Solstices are the longest and shortest days of the year.
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How does a solar sail work?
Solar sails use wind to propel a ship in the same way that sailing ships use light.
Solar sails use light pressure to propel a ship in the same way that sailing ships use wind.
Solar sails use light to propel a ship in the same way that sailing ships use sails.
Answer
Correct Answer:
Solar sails use light pressure to propel a ship in the same way that sailing ships use wind.
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What are solar rays?
A type of cheese
Charged particles (X-rays) blown off from the sun's fusion furnace
A kind of tea
A cake
Answer
Correct Answer:
Charged particles (X-rays) blown off from the sun's fusion furnace
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What is a sidereal day?
The length of time for the earth to rotate around the sun.
The length of time for the earth to rotate on its axis.
The length of time for the moon to orbit the earth.
The length of time it takes for light to travel from the sun to the earth.
Answer
Correct Answer:
The length of time for the earth to rotate on its axis.
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What is the radius of Saturn?
60,267 kilometers
61,362 kilometers
60,369 kilometers
58,232 kilometers
Answer
Correct Answer:
60,369 kilometers
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What is the 6th-planet of the solar system?
Saturn
Neptune
Jupiter
Earth
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What pulls satellites towards the center of a gravity well?
The satellite's radial momentum.
The satellite's forward momentum.
The satellite's rotational momentum.
The inward pull of gravity
Answer
Correct Answer:
The inward pull of gravity
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What is Newton's third law of motion?
Every action has an equal and opposite reaction
Objects at rest tend to stay at rest
Objects in motion tend to stay in motion
For every action, there is an equal and opposite reaction
Answer
Correct Answer:
Every action has an equal and opposite reaction
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Which law states that an object's momentum changes in proportion to the force acting on it?
Newton's 2nd-law of motion
Newton's 1st-law of motion
Newton's 3rd-law of motion
Newton's law of gravitation
Answer
Correct Answer:
Newton's 2nd-law of motion
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What is Newton's 1st-law of motion?
Objects stay in their inertial state unless acted upon by an outside force.
Objects at rest tend to stay at rest unless acted on by an unbalanced force.
For every action, there is an equal and opposite reaction.
Objects in motion tend to stay in motion unless acted on by an unbalanced force.
Answer
Correct Answer:
Objects stay in their inertial state unless acted upon by an outside force.
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What is the radius of Neptune?
11,490 kilometers
3,850 kilometers
21,120 kilometers
24,300 kilometers
Answer
Correct Answer:
24,300 kilometers
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What is the 8th-planet of the solar system?
Saturn
Venus
Neptune
Earth
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What is the Moon's average orbiting speed?
0.5139 kiloms per second
1.0183 kiloms per second
2.0216 kiloms per second
1.5274 kiloms per second
Answer
Correct Answer:
1.0183 kiloms per second
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Mercury is the _____ planet of the solar system?
1st
2nd
4th
3rd
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What does maxRAY signify?
Max height of an elliptic orbit
Shortest radius of an elliptic orbit
Longest radius of an elliptic orbit
Mean radius of an elliptic orbit
Answer
Correct Answer:
Longest radius of an elliptic orbit
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What is the name of the point at which an orbit's maximum altitude occurs?
MaxLENGTH
MaxHEIGHT
MaxRAY
MinDEPH
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What does Libration mean?
A unit of measurement
Back and forth motion due to the earth's wobble on its axis
The process of freeing something
A type of dance
Answer
Correct Answer:
Back and forth motion due to the earth's wobble on its axis
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How high can LEO satellites orbit?
800 meters
800 kilometers
80 kilometers
8 kilometers
Answer
Correct Answer:
800 kilometers
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What does latitude represent?
The distance north or south of the earth's equator, measured in degrees
Latitude represents the spherical angle away from the earth's equator.
The distance east or west of the prime meridian, measured in degrees
The rate at which the earth's rotational speed is changing
Answer
Correct Answer:
Latitude represents the spherical angle away from the earth's equator.
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What is the dynamic form of energy?
Energy
Potential
Kinetic
Static
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What is the 5th-planet of the solar system?
Jupiter
Saturn
Neptune
Earth
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What does intercept angle signify?
The angle of reflection
The angle of incidence
The angle of refraction
The optimal angle to approach a gravity-well.
Answer
Correct Answer:
The optimal angle to approach a gravity-well.
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What does Interval of thrust measure?
The duration of rocket boost needed to achieve the desired delta-V
The amount of boost needed to achieve delta-V
The desired delta-V
The amount of fuel needed to achieve delta-V
Answer
Correct Answer:
The duration of rocket boost needed to achieve the desired delta-V
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What does inclination refer to?
The shape of the orbit
The slant of the orbital plane
The location of the orbit
The size of the orbit
Answer
Correct Answer:
The slant of the orbital plane
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What does HEO stand for?
High Earth Orbit
Heavy Equipment Operator
Her Majesty's Own
Highly Elliptical Orbit
Answer
Correct Answer:
High Earth Orbit
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What is the gravitational center?
The center of the Earth
The center of mass of the gravitational attractor.
The center of the galaxy
The center of the universe
Answer
Correct Answer:
The center of mass of the gravitational attractor.
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What is a Gravitational Attractor?
A device that measure the force of gravity between two objects.
The largest object in a gravitational system.
Any massive body that exerts gravity and causes a speeding spacecraft to curve around its attraction.
An object in space with a gravitational pull strong enough to capture light.
Answer
Correct Answer:
Any massive body that exerts gravity and causes a speeding spacecraft to curve around its attraction.
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What is the acronym for Global Positioning Satellites?
GNP
GPS
GPO
GBS
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What does the acronym GP stand for?
General Purpose
Gross Profit
General Physician
Gravitational Parameter
Answer
Correct Answer:
Gravitational Parameter
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What is GEO an abbreviation for?
Grounded Electrical Outlet
Geosynchronous orbit
Geostationary orbit
Giant Evergreen Ogres
Answer
Correct Answer:
Geosynchronous orbit
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Friction is caused by the interaction of two surfaces. What does it do to earthside vehicles?
Makes them go faster
Makes them stop
Changes their direction
Slows them down
Answer
Correct Answer:
Slows them down
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Flightpath angle equals _____ minus the angle of the velocity vector.
90°
45°
60°
75°
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What is flightpath?
The satellite's path as it falls to Earth.
The satellite's orbital path around Earth.
The straight line path of the satellite.
The tangent to the orbital arc of the satellite in the direction of motion.
Answer
Correct Answer:
The tangent to the orbital arc of the satellite in the direction of motion.
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What is equatorial plane?
The line of 0 degrees latitude
The line of 0 degrees longitude
A great circle that extends as far as needed on the plane of the earth's equator.
An imaginary line running through the middle of the earth
Answer
Correct Answer:
A great circle that extends as far as needed on the plane of the earth's equator.
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Ellipses are the locus of points on a plane where __________
Locus of points where a line cuts a conic surface at two distinct points
Sum of distances from a satellite to each focus point returns a constant value
Planes intersect at a common point
Line segments between two distinct points
Answer
Correct Answer:
Sum of distances from a satellite to each focus point returns a constant value
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What is the Ecliptic?
The plane of Mars' orbit around the sun.
The plane of Jupiter's orbit around the sun.
The plane of the moon's orbit around the earth.
The plane of earth's orbit around the sun.
Answer
Correct Answer:
The plane of earth's orbit around the sun.
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What term is used for eccentricity in Discovering Orbits?
Elongation
Exp (expander)
Expansion
Ellipticity
Answer
Correct Answer:
Exp (expander)
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What is eccentric anomaly?
An intermediary angle sweeping from the geometric center of orbit.
The point where the orbit of a planet is farthest from the Sun
The starting point of the orbit of a planet
The point where the orbit of a planet is closest to the Sun
Answer
Correct Answer:
An intermediary angle sweeping from the geometric center of orbit.
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What is the acronym for Dynamic Stretch Speed?
GDS
SDS
DSS
BSS
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What is diurnal motion?
The predicted travel of a satellite or planet over a 24-hour period
The observed travel of a satellite or planet over a 24-hour period
The observed travel of a satellite or planet over a 12-hour period
The predicted travel of a satellite or planet over a 12-hour period
Answer
Correct Answer:
The observed travel of a satellite or planet over a 24-hour period
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What does deceleration mark?
The change in speed of an object.
The slowing down of a speeding object.
The speeding up of an object.
The change in direction of an object.
Answer
Correct Answer:
The slowing down of a speeding object.
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What is DCS?
Dynamic Circular Speed
Direct Current Switching
Direct Current Series
Diode-Capacitor Switching
Answer
Correct Answer:
Dynamic Circular Speed
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How do we normally reckon a day?
From sunrise to sunset
From midnight to midnight
From noon to noon
From sunset to sunrise
Answer
Correct Answer:
From midnight to midnight
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What are cosmic rays?
Highly charged elemental particles arriving from deep space.
A type of electrical current
A unit of radioactivity
A form of energy
Answer
Correct Answer:
Highly charged elemental particles arriving from deep space.
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What is the Coriolis effect?
The way winds blow from the equator to the poles
The way air moves around a low-pressure system
A spinning environment
The rotation of the Earth
Answer
Correct Answer:
A spinning environment
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What does the term 'Cislunar' signify?
The atmospheric layer between the earth and space.
A type of rock found on the moon
The area on the moon that is permanently dark
The volume in and around the sun-moon system.
Answer
Correct Answer:
The volume in and around the sun-moon system.
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What is centripetal force?
A force that repels spacecraft from the gravitational center
A force that attracts spacecraft to the gravitational center
The speed of a spacecraft in a straight line
A force that counterbalances the speed of a spacecraft
Answer
Correct Answer:
A force that counterbalances the speed of a spacecraft
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What is the name of the force that pushes against the outer frame of a spinning disk?
Friction
Inertia
Centrifugal force
Gravity
Answer
Correct Answer:
Centrifugal force
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What is the center of gravity?
A black hole
The center of the universe
The middle of a planet
The gravitational center of a massive object
Answer
Correct Answer:
The gravitational center of a massive object
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What imaginary great circle around the earth lies on level with the earth's orbit around the sun?
Celestial equator
Laplacian plane
Line of nodes
Ecliptic
Answer
Correct Answer:
Celestial equator
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Bode's Law is a formula that calculates the average distances of planetary orbits from closest to furthest away from which star?
Moon
Proxima Centauri
Sun
Andromeda
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From which position is the azimuth angle measured?
90 degrees east
Zero degrees north
45 degrees west
Zero degrees south
Answer
Correct Answer:
Zero degrees north
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From which direction does the azimuth angle sweep?
North
South
Counterclockwise
Clockwise
Answer
Correct Answer:
Clockwise
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What does "Away angle" refer to?
Spacecraft in LEO traveling toward a lunar capture.
Spacecraft in GEO traveling toward a lunar capture.
Spacecraft in GEO traveling toward a solar capture.
Spacecraft in LEO traveling toward a solar capture.
Answer
Correct Answer:
Spacecraft in LEO traveling toward a lunar capture.
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Average speed marks the rate of what?
Distance traveled in a specified amount of time
Time taken to complete an orbit
The highest speed reached during an orbit
Distance covered during a full orbit
Answer
Correct Answer:
Distance covered during a full orbit
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What is the Autumnal Equinox?
The first day of autumn
The longest day of the year
The moment of equal daylight and darkness at the end of summer
The shortest day of the year
Answer
Correct Answer:
The moment of equal daylight and darkness at the end of summer
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What does the acronym AU stand for?
Africa Union
Atlantic Union
American University
Astronomical Unit
Answer
Correct Answer:
Astronomical Unit
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What are asteroids often called?
Planetoids
Planets
Meteors
Moonlets
Answer
Correct Answer:
Planetoids
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What does apogee mark?
A satellite's closest point to the earth.
A satellite's far-point of orbit around the earth.
The highest point in the satellite's orbit.
None of the above.
Answer
Correct Answer:
A satellite's far-point of orbit around the earth.
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What is the apoasis?
The satellite's farthest distance away from the gravitational attractor
The satellite's closest approach to the gravitational attractor
The far-point of orbit around a gravitational attractor
The highest orbit above the gravitational attractor
Answer
Correct Answer:
The far-point of orbit around a gravitational attractor
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What does Aphelion mark?
The end of a satellite's orbit around the sun
The start of a satellite's orbit around the sun
A satellite's far-point of orbit around the sun
A satellite's closest point of orbit around the sun
Answer
Correct Answer:
A satellite's far-point of orbit around the sun
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What is the astronomer's term for angle?
Declination
Azimuth
Anomaly
Angle
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What does angular momentum measure?
Size of satellite's orbit around planet
Area swept by satellite's current radius around its gravity center
Rotation of satellite around planet
Speed of satellite's orbit around planet
Answer
Correct Answer:
Area swept by satellite's current radius around its gravity center
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What is the definition of an angle?
The sweeping motion around a central origin.
A straight line between two points.
A figure with three sides and three angles.
The space within two lines or rays diverging from a common point.
Answer
Correct Answer:
The sweeping motion around a central origin.
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What does acceleration signify?
The change in the rate of weight
The change in the rate of speed
The change in the rate of size
The change in the rate of mass
Answer
Correct Answer:
The change in the rate of speed
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What is the name of the process in which landing is done on a lakebed runway?
Lakebed Landings
Ocean landings
Desert landings
Snow landings
Answer
Correct Answer:
Lakebed Landings
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What is Jet Wake Dispersion?
The spread of jet engines around the world
The Manufacture of jet engines
The spread of a jet engines exhaust wake following ejection from the jet manifold
The spread of jet engine information on the internet
Answer
Correct Answer:
The spread of a jet engines exhaust wake following ejection from the jet manifold
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What is the minimum speed required for a flight to be considered hypersonic?
Equal to 5 times the speed of sound
More than 5 times the speed of sound.
More than 10 times the speed of sound.
Less than 5 times the speed of sound
Answer
Correct Answer:
More than 5 times the speed of sound.
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What is friction?
The force that opposes the relative motion of two surfaces in contact with each other.
The rubbing of one object against another.
The force of the air on the aircraft changing the way the craft performs.
The force between two surfaces that are in contact with each other.
Answer
Correct Answer:
The force of the air on the aircraft changing the way the craft performs.
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What is the main result of flow separation?
Increased drag and less lift
Greater efficiency
Less drag and more lift
No change
Answer
Correct Answer:
Increased drag and less lift
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What does the Flight Control System do?
It controls the pilot
It manages the booking of tickets
It controls the functionality of the different part of the planes.
It provides entertainment on the plane
Answer
Correct Answer:
It controls the functionality of the different part of the planes.
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Flaps are usually attached to the leading edge of an airplane's wings to
Reduce lift or drag
Decrease drag
Increase lift
Increase lift or drag
Answer
Correct Answer:
Increase lift or drag
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What is an electrical transient?
A power outage
Alternating magnetic current which reduces the loss of efficiency
A power surge
A brief surge of electricity
Answer
Correct Answer:
Alternating magnetic current which reduces the loss of efficiency
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What is the definition of dihedral?
The number of engines an aircraft has
The weight of an aircraft
The upward or downward inclination of an aircraft wing from true horizontal
The speed of an aircraft
Answer
Correct Answer:
The upward or downward inclination of an aircraft wing from true horizontal
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What is the name of the process whereby flight is controlled by data sent from the command?
Flight Maneuvers
PilotTraining
Air Traffic Control
Data Maneuvers
Answer
Correct Answer:
Data Maneuvers
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What is the system that allows the pilot to fly the vehicle?
Defensive System
Operational System
Automated System
Control System
Answer
Correct Answer:
Control System
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What are contract standards?
A type of aircraft
The process of making an aircraft
The study of aircraft
Requirements an aircraft must fulfill in order to get a contract to produce it.
Answer
Correct Answer:
Requirements an aircraft must fulfill in order to get a contract to produce it.
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What is a Climbout profile?
A device used to measure air speed
The angle at which an airplane tilts during takeoff
The path of an airplane as the pilot executes climbing maneuvers
A measure of an airplane's fuel efficiency
Answer
Correct Answer:
The path of an airplane as the pilot executes climbing maneuvers
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What is the transparent enclosure over the cockpit of an aircraft called?
Propeller
Canopy
Windshield
Landing Gear
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What is cabin pressure?
The area within the aircraft where the passengers sit
The atmospheric pressure within the cabin, controlled to reduce physical strain on the pilot.
The force needed to fly the aircraft
The pressure exerted by air on the sides of the aircraft
Answer
Correct Answer:
The atmospheric pressure within the cabin, controlled to reduce physical strain on the pilot.
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What is the purpose of a bulkhead?
To partition
To give access
To create a sloping door
To resist pressure
Answer
Correct Answer:
To resist pressure
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What is the boundary layer?
The part of the aircraft that is close to the surface of the earth.
The part of the aircraft that is far from the surface of the earth.
The thin layer of air close to the surface of an aircraft.
A layer of air that is thick and close to the surface of an aircraft.
Answer
Correct Answer:
The thin layer of air close to the surface of an aircraft.
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What is a biplane?
An airplane having two pairs of wings fixed at different levels
A plane powered by two engines
A plane designed for acrobatic flying
A plane with two sets of controls
Answer
Correct Answer:
An airplane having two pairs of wings fixed at different levels
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What is a barometer used for?
Measuring the amount of sunlight in an area
Measuring the amount of precipitation in an area
Measuring atmospheric pressure
Measuring the temperature of an area
Answer
Correct Answer:
Measuring atmospheric pressure
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What does axial-flow mean?
Extending in a direction parallel to the plane of a cyclic structure
Not extending in a direction perpendicular or parallel to the plane of a cyclic structure
Extending in a direction essentially perpendicular to the plane of a cyclic structure
Answer
Correct Answer:
Extending in a direction essentially perpendicular to the plane of a cyclic structure
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What is the primary power unit of the aircraft?
Engine
Propeller
Powerplant
Auxiliary-Power-Unit
Answer
Correct Answer:
Auxiliary-Power-Unit
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What causes atmospheric turbulence?
Variations in atmospheric pressure from spot to spot
The time of day
Air moving across the surface of the earth
The position of the sun
Answer
Correct Answer:
Variations in atmospheric pressure from spot to spot
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What is the term for aircraft once used by the military that are now used for testing?
Civilian aircraft
Armed service discards
Experimental aircraft
Retired aircraft
Answer
Correct Answer:
Armed service discards
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What is the angle between the chord of the wing and the relative wind called?
Angle of Lift
Wingtip Vortex
Angle of Attack
Angle of Drag
Answer
Correct Answer:
Angle of Attack
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What is the term for the vertical distance between an aircraft and mean sea level?
Elevation
Altitude
Latitude
Longitude
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What is an airfoil?
A device that measures air pressure.
A body designed to provide a desired reaction force when in motion relative to the surrounding air.
A device that helps an object move through the air.
A device that controls the air flowing over an object.
Answer
Correct Answer:
A body designed to provide a desired reaction force when in motion relative to the surrounding air.
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What term describes the primary aircraft angles in the state vector?
Acknowledgment
Attitude
Address
Attribute
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What is an aircraft?
A machine or structure capable of flight in air and regarded as a vehicle
A machine or structure capable of flight in air
A vehicle capable of flight in air and regarded as a machine or structure
A machine or structure that can fly
Answer
Correct Answer:
A machine or structure capable of flight in air and regarded as a vehicle
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What is air flow?
The pressure of air
The temperature of air
The motion of air currents around an object as it moves through the air
The motion of an object through the air
Answer
Correct Answer:
The motion of air currents around an object as it moves through the air
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What is the purpose of an aileron?
To control the plane's rolling and banking movements
To decrease drag
To increase lift
To provide stability
Answer
Correct Answer:
To control the plane's rolling and banking movements
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What is the function of an aileron?
To increase the drag of an airplane wing
To impart a rolling motion to an airplane wing
To increase the lift of an airplane wing
To decrease the lift of an airplane wing
Answer
Correct Answer:
To impart a rolling motion to an airplane wing
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What is the Aeroelastic Effect?
The way a airplane moves through the air
The study of how objects move through the air
The study of aerodynamics
Flexibility of a lifting body
Answer
Correct Answer:
Flexibility of a lifting body
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What is Aerial Towing?
Attaching a glider to an airplane
Pulling a glider or other object through the air by means of an aircraft
Flying an aircraft without a motor
Hitching a ride on an airplane
Answer
Correct Answer:
Pulling a glider or other object through the air by means of an aircraft
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What does AFTI stand for?
Advanced Fighter Technology Institute
Air Force Technology Integration
Air Force Technology Initiative
Advanced Fighter Technology Integration
Answer
Correct Answer:
Advanced Fighter Technology Integration
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What is acetylene used for?
Cutting metal
Metal welding and cutting
Making fertilizer
Manufacturing plastic
Answer
Correct Answer:
Metal welding and cutting
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What is the meaning of Ablator?
A device that measures air pressure
To remove a cancerous tumor
The dissipation of heat generated by atmospheric friction
The acceleration of a spacecraft by a rocket
Answer
Correct Answer:
The dissipation of heat generated by atmospheric friction
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What does the ablative denote?
The change of something
The addition of something
The removal of something, especially through abrasion, cutting, or evaporation.
The state of something
Answer
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The removal of something, especially through abrasion, cutting, or evaporation.
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What was the AAF Bell Project designed to do?
Design aircraft for the air forces
Provide data about transonic speeds
Gather data at transonic speeds
Collect funds for the air forces
Answer
Correct Answer:
Gather data at transonic speeds
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What is the name of the cone shaped assembly behind a turbojet engine through which the exhaust gases are discharged?
Wing-Cone
Nose-Cone
Cockpit
Tail-Cone
Answer
Correct Answer:
Tail-Cone
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What is laminar flow?
Laminar flow is water flow in a aqueduct.
Laminar flow is the curved path of a satellite in Earth's gravitational field.
Laminar flow is parallel flow of air in the boundary layer to the surface of an airplane.
Laminar flow is an inconspicuous galaxy
Answer
Correct Answer:
Laminar flow is parallel flow of air in the boundary layer to the surface of an airplane.
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What is Boundary-Layer?
The space between two objects
The outermost layer of the Earth's atmosphere
A thin layer of air next to an airfoil of an aircraft in flight
A layer of the Sun's atmosphere
Answer
Correct Answer:
A thin layer of air next to an airfoil of an aircraft in flight
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What is Boundary Layer Flow?
A type of fluid motion
Noise created when a fluid moves over a solid surface.
The movement of fluid over a solid surface
The study of fluid motion
Answer
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Noise created when a fluid moves over a solid surface.
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What is fluid flow where particles move in a disoriented matter in an irregular path resulting in an exchange of momentum called?
Diffusion
Atmospheric Turbulence
Boiling
Evaporation
Answer
Correct Answer:
Atmospheric Turbulence
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What is the angle of attack?
The angle at which the wing of the airplane hits the air.
The angle at which the airplane hits the ground.
The angle at which the airplane hits the runway.
The angle at which the air hits the wing of an airplane.
Answer
Correct Answer:
The angle at which the air hits the wing of an airplane.
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What is the study of the motions of artificial satellites and space vehicles moving under the influence of forces such as gravity, atmospheric drag, thrust, etc called?
Astrodynamics
Aeronautical Engineering
Space Mechanics or Orbital mechanics
Celestial Mechanics
Answer
Correct Answer:
Space Mechanics or Orbital mechanics
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