CITY AND GUILDS LATEST
LEVEL 3
AERONAUTICAL
ENGINEERING: UNIT 215
Give an example of a simple machine used in aircraft - ANSWERS-
Pulley in flight control cables
Define mechanical advantage with a screw jack. - ANSWERS-Ratio of
load lifted to effort applied.
What is precession (gyroscopic)? - ANSWERS-The tendency of a
spinning object to react at 90 degrees to an applied force.
List 3 types of simple machines - ANSWERS-lever, pulley, inclined
plane.
Kinetic energy equation: - ANSWERS-K E = 1/2 x mv^2
How does friction affect aircraft systems? - ANSWERS-Reduces
efficiency and causes wear in mechanical linkages.
Work formula: - ANSWERS-W = Fd
END OF
PAGE
1
, CITY AND GUILDS LATEST
LEVEL 3
AERONAUTICAL
ENGINEERING: UNIT 215
Power formula: - ANSWERS-P = W/t
Kinetic energy formula: - ANSWERS-K E = 1/2 mv^2
Potential energy formula: - ANSWERS-P E = mgh
Mechanical advantage equation: - ANSWERS-load / effort
Velocity ratio: - ANSWERS-distance moved by effort / distance moved
by load
What is Bernoulli's principle? - ANSWERS-As fluid speed increases,
pressure decreases
Define density. - ANSWERS-mass per unit volume: p = m/v
END OF
PAGE
2
, CITY AND GUILDS LATEST
LEVEL 3
AERONAUTICAL
ENGINEERING: UNIT 215
What is relative density? - ANSWERS-Ratio of a substance's density to
that of water
What causes lift on an aerofoil? - ANSWERS-Pressure difference due to
airflow speed variation (Bernoulli)
What happens to air pressure as altitude increases? - ANSWERS-It
decreases
How does pressure change with altitude? - ANSWERS-It decreases
exponentially
What is relative density. - ANSWERS-Ratio of the density of a
substance to the density of water.
What is the role of viscosity in aircraft oil systems? - ANSWERS-
Ensures proper lubrication and resistance to flow at varying
temperatures.
END OF
PAGE
3
LEVEL 3
AERONAUTICAL
ENGINEERING: UNIT 215
Give an example of a simple machine used in aircraft - ANSWERS-
Pulley in flight control cables
Define mechanical advantage with a screw jack. - ANSWERS-Ratio of
load lifted to effort applied.
What is precession (gyroscopic)? - ANSWERS-The tendency of a
spinning object to react at 90 degrees to an applied force.
List 3 types of simple machines - ANSWERS-lever, pulley, inclined
plane.
Kinetic energy equation: - ANSWERS-K E = 1/2 x mv^2
How does friction affect aircraft systems? - ANSWERS-Reduces
efficiency and causes wear in mechanical linkages.
Work formula: - ANSWERS-W = Fd
END OF
PAGE
1
, CITY AND GUILDS LATEST
LEVEL 3
AERONAUTICAL
ENGINEERING: UNIT 215
Power formula: - ANSWERS-P = W/t
Kinetic energy formula: - ANSWERS-K E = 1/2 mv^2
Potential energy formula: - ANSWERS-P E = mgh
Mechanical advantage equation: - ANSWERS-load / effort
Velocity ratio: - ANSWERS-distance moved by effort / distance moved
by load
What is Bernoulli's principle? - ANSWERS-As fluid speed increases,
pressure decreases
Define density. - ANSWERS-mass per unit volume: p = m/v
END OF
PAGE
2
, CITY AND GUILDS LATEST
LEVEL 3
AERONAUTICAL
ENGINEERING: UNIT 215
What is relative density? - ANSWERS-Ratio of a substance's density to
that of water
What causes lift on an aerofoil? - ANSWERS-Pressure difference due to
airflow speed variation (Bernoulli)
What happens to air pressure as altitude increases? - ANSWERS-It
decreases
How does pressure change with altitude? - ANSWERS-It decreases
exponentially
What is relative density. - ANSWERS-Ratio of the density of a
substance to the density of water.
What is the role of viscosity in aircraft oil systems? - ANSWERS-
Ensures proper lubrication and resistance to flow at varying
temperatures.
END OF
PAGE
3
