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Technical Measurements Flashcards

7 cards from real CBP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Technical Measurements flashcards as text

  1. A stair has a total rise of 108 inches, and the IRC limits risers to 7-3/4 inches. What is the minimum number of risers?

    Answer: 14

    108 / 7.75 = 13.94, which rounds up to 14 risers.

  2. Under the IRC, what is the minimum tread depth for residential stairs?

    Answer: 10 inches

    IRC R311.7.5.2 requires a minimum tread depth of 10 inches.

  3. A gable end is a triangle with a 24-ft base and an 8-ft height. What is its area?

    Answer: 96 square feet

    Triangle area = 1/2 x 24 x 8 = 96 square feet.

  4. A takeoff shows a dimension of 0.75 ft. What is that in inches?

    Answer: 9 inches

    0.75 x 12 = 9 inches.

  5. What is the rafter length (to the nearest hundredth, no overhang) for a 12-ft run at a 6/12 pitch?

    Answer: 13.42 ft

    Rise is 6 ft, so length = √(12² + 6²) = √180 ≈ 13.42 ft.

  6. How many studs are needed for a 24-ft wall framed at 16 inches on center, not counting corners, openings, or extra plates?

    Answer: 19

    288 in / 16 = 18 spaces, plus 1 for the end stud = 19 studs.

  7. Walls total 1,200 sq ft and need two coats of paint. At 400 sq ft per gallon, how many gallons are needed?

    Answer: 6 gallons

    1,200 x 2 coats = 2,400 sq ft, and 2,400 / 400 = 6 gallons.

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Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. portal.ct.gov — Eligibility · verified Oct 2026
  2. phta.org — Score validity, test delivery, exam dates, registration deadline, score release, test dates, fees, exam format, passing score, time limit · verified Oct 2026