Trade Math and Measurements Flashcards
6 cards from real EIAT and NEIEP Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Trade Math and Measurements flashcards as text
What is the area of a circle with a diameter of 10 inches? (Use π ≈ 3.14)
Answer: 78.5 sq in
Area = π × r² = 3.14 × 5² = 3.14 × 25 = 78.5 square inches (radius = diameter ÷ 2 = 5 in).
A worker earns $34.50 per hour and works 42 hours in a week (first 40 at regular rate, last 2 at time-and-a-half). What is gross pay?
Answer: $1,483.50
Regular pay: 40 × $34.50 = $1,380. OT pay: 2 × ($34.50 × 1.5) = 2 × $51.75 = $103.50. Total = $1,483.50.
Using the Pythagorean theorem, if one leg of a right triangle is 6 and the hypotenuse is 10, what is the other leg?
Answer: 8
c² = a² + b², so b² = 10² − 6² = 100 − 36 = 64, and b = √64 = 8.
If a conduit fill is 40% with two #12 AWG conductors (each 0.0133 sq in), what is the minimum conduit area required?
Answer: 0.0665 sq in
Total conductor area = 2 × 0.0133 = 0.0266 sq in. At 40% fill: minimum conduit area = 0.0266 ÷ 0.40 = 0.0665 sq in.
Express 0.375 as a fraction in its simplest form.
Answer: 3/8
0.375 = 375/1000 = 3/8 after dividing numerator and denominator by their GCF of 125.
A step-down transformer has a primary voltage of 4,160V and a turns ratio of 20:1. What is the secondary voltage?
Answer: 208V
Secondary voltage = Primary voltage ÷ Turns ratio = 4,160V ÷ 20 = 208V.
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