Practice Test Geeks(CFS) Certified Fastener Specialist Practice Test
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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 torque wrench specification lists a maximum of 200 in·lbf. What is this in N·m?

    Answer: 22.6 N·m

    1 in·lbf = 0.1130 N·m, so 200 × 0.1130 = 22.6 N·m.

  2. An anchor bolt is specified as 5/8-11 UNC. What is the nominal diameter in millimeters?

    Answer: 15.875 mm

    5/8 inch = 0.625 in × 25.4 = 15.875 mm.

  3. A metric socket head cap screw (SHCS) has a socket drive size of 6 mm. What is the approximate equivalent AF (across flats) in inch drive sizes?

    Answer: 0.236 inch (1/4 inch nominal)

    6 mm ÷ 25.4 = 0.236 in, which corresponds to a 1/4-inch nominal hex key.

  4. What is the equivalent of 1 kN (kilonewton) in pound-force?

    Answer: 224.8 lbf

    1 kN = 1,000 N × 0.2248 lbf/N = 224.8 lbf.

  5. A fastener's proof load is 85 kN for an M20 bolt. What is this in pound-force?

    Answer: 19,108 lbf

    85 kN × 1,000 N/kN × 0.2248 lbf/N = 19,108 lbf.

  6. Which metric bolt class has a minimum tensile strength of approximately 150,000 psi (1,034 MPa)?

    Answer: Class 10.9

    Class 10.9 has a minimum tensile strength of 1,040 MPa ≈ 150,800 psi, which matches the ~150,000 psi specification.

  7. A 1/4-20 UNC screw has a nominal diameter of 0.250 inches. What is the root (minor) diameter in millimeters, given a root diameter of 0.1887 inches?

    Answer: 4.793 mm

    0.1887 in × 25.4 = 4.793 mm.