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CITY AND GUILDS LEVEL 3 AERONAUTRICAL ENGINEERING
UNIT 215 EXAM LATEST UPDATE -2026- 100+ QUESTIONS AND
VERIFIED ANSWERS ALL THE BEST
Define terminating decimal.
A decimal that ends or has a finite number of digits.
Define recurring decimal.
A decimal in which a digit or group of digits repeats infinitely.
What's the constant of proportionality?
The value that links two variables in direct or inverse proportion, e.g., y = kx
What are 'awkward fractions'?
Non-standard fractions that don't simplify easily (e.g. 13/17).
Where are fractions used in engineering?
Imperial sizing: e.g., 3/8" bolts or 1 1/2" spanners.
Area of a rectangle:
A=lxw
Area of a triangle:
A = 1.2 x b x h
Area of a circle:
pi x r^2
Percentage equation:
, 2
Percent = (Part / Whole) x 100
Ratio equation:
a : b = a/b
Proportion equation (Direct):
y = kx
Proportion equation (Inverse):
y = k/x
Standard form equation:
a x 10^n
Convert 75 inches to metres (1 inch = 0.025 m).
75 x 0.025 = 1.875 m
Name two SI base units used in aviation.
Metre (m) for length, kilogram (kg) for mass.
What is the difference between absolute and relative error?
Absolute = actual difference; Relative = difference as a percentage of true value.
Convert 200 psi to Pascals (1 psi ≈ 7000 Pa)
200 x 7000 = 1 ,400,000
What is the prefix and value of 'kilo'?
10^3
List three US Customary units for fuel.
US gallons, pounds (lb), and litres (converted values).
When is absolute error critical in aviation?
Fuel loading, pressure readings, or weight-and-balance checks.
CITY AND GUILDS LEVEL 3 AERONAUTRICAL ENGINEERING
UNIT 215 EXAM LATEST UPDATE -2026- 100+ QUESTIONS AND
VERIFIED ANSWERS ALL THE BEST
Define terminating decimal.
A decimal that ends or has a finite number of digits.
Define recurring decimal.
A decimal in which a digit or group of digits repeats infinitely.
What's the constant of proportionality?
The value that links two variables in direct or inverse proportion, e.g., y = kx
What are 'awkward fractions'?
Non-standard fractions that don't simplify easily (e.g. 13/17).
Where are fractions used in engineering?
Imperial sizing: e.g., 3/8" bolts or 1 1/2" spanners.
Area of a rectangle:
A=lxw
Area of a triangle:
A = 1.2 x b x h
Area of a circle:
pi x r^2
Percentage equation:
, 2
Percent = (Part / Whole) x 100
Ratio equation:
a : b = a/b
Proportion equation (Direct):
y = kx
Proportion equation (Inverse):
y = k/x
Standard form equation:
a x 10^n
Convert 75 inches to metres (1 inch = 0.025 m).
75 x 0.025 = 1.875 m
Name two SI base units used in aviation.
Metre (m) for length, kilogram (kg) for mass.
What is the difference between absolute and relative error?
Absolute = actual difference; Relative = difference as a percentage of true value.
Convert 200 psi to Pascals (1 psi ≈ 7000 Pa)
200 x 7000 = 1 ,400,000
What is the prefix and value of 'kilo'?
10^3
List three US Customary units for fuel.
US gallons, pounds (lb), and litres (converted values).
When is absolute error critical in aviation?
Fuel loading, pressure readings, or weight-and-balance checks.
