FAA Aviation Mechanic General (AMG)Physics, Math and Fluid LinesEasy
A technician selects tubing labeled 3/8 inch for a fluid line repair. What is the decimal equivalent of this fraction, needed to verify the size with a caliper?
- A0.438
- B0.375
- C0.325
- D0.500
Show answer & explanationAnswer & explanation
Correct answer: B. 0.375
To convert a fraction to a decimal, divide the numerator by the denominator: 3 ÷ 8 = 0.375.
Why the other options are wrong
- A. This is closer to 7/16 (0.4375), not 3/8.
- C. This does not match the correct division result.
- D. This is the decimal equivalent of 1/2, not 3/8.
Fraction-to-Decimal Conversion
Converting a fraction to a decimal by dividing the numerator by the denominator, essential for measuring and matching tubing/fastener sizes.
- Divide numerator by denominator
- 3/8 = 0.375
- Common aviation sizes: 1/4=0.250, 3/8=0.375, 1/2=0.500
Memory trick: Top divided by bottom gives the decimal truth.