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Metric & Imperial Conversion Flashcards

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

Read the first 7 Metric & Imperial Conversion flashcards as text

  1. A bolt has a shank diameter of 12 mm. What is the closest standard inch fractional size?

    Answer: 1/2 inch (12.70 mm)

    12 mm converts to approximately 0.472 inches, and 1/2 inch (0.500 in / 12.70 mm) is the closest standard size.

  2. Convert a torque value of 100 N·m to foot-pounds (ft·lbf).

    Answer: 73.8 ft·lbf

    1 N·m equals 0.7376 ft·lbf, so 100 N·m × 0.7376 = 73.76 ft·lbf ≈ 73.8 ft·lbf.

  3. A fastener specification lists a proof load stress of 120,000 psi. What is this value in MPa?

    Answer: 827 MPa

    1 psi = 0.006895 MPa, so 120,000 psi × 0.006895 = 827.4 MPa.

  4. An M10 bolt has a pitch of 1.5 mm. What is the approximate threads per inch (TPI) equivalent?

    Answer: 16.9 TPI

    TPI = 25.4 ÷ pitch (mm), so 25.4 ÷ 1.5 = 16.93 TPI.

  5. Convert 50 inch-pounds (in·lbf) of torque to Newton-meters (N·m).

    Answer: 5.65 N·m

    1 in·lbf = 0.1130 N·m, so 50 × 0.1130 = 5.65 N·m.

  6. A washer has an outer diameter of 1.500 inches. What is this dimension in millimeters?

    Answer: 38.10 mm

    1 inch = 25.4 mm, so 1.500 × 25.4 = 38.10 mm.

  7. A metric fastener drawing specifies a hole depth of 25 mm. A technician measures 1.00 inch. Is the hole deep enough?

    Answer: Yes; 1.00 inch = 25.4 mm, which exceeds 25 mm

    1.00 inch = 25.4 mm, which is greater than the required 25 mm, so the hole is deep enough.