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
A 120V circuit draws 15A. How many watts of power is being consumed?
Answer: 1800W
Power = Voltage × Current = 120V × 15A = 1,800 watts.
How many inches are in 7 feet 6 inches?
Answer: 90 inches
7 feet × 12 in/ft = 84 inches, plus 6 inches = 90 inches total.
The multiplier for a 45° offset in conduit bending is approximately:
Answer: 1.414
The multiplier for a 45° conduit offset is approximately 1.414 (the square root of 2), used to calculate the distance between bends.
If a motor nameplate lists 7.5 HP, approximately how many watts is this? (1 HP ≈ 746 W)
Answer: 5,595W
7.5 HP × 746 W/HP = 5,595 watts.
A circuit has three resistors in parallel: 10Ω, 20Ω, and 40Ω. What is the equivalent resistance?
Answer: 5.71Ω
1/R = 1/10 + 1/20 + 1/40 = 4/40 + 2/40 + 1/40 = 7/40, so R = 40/7 ≈ 5.71Ω.
A 240V, 30A circuit has a load of 5,760W. What is the power factor?
Answer: 0.80
PF = True Power / Apparent Power = 5,760W / (240V × 30A) = 5,760 / 7,200 = 0.80.
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