Diameter of rivet hole (d, mm) and the plate thickness (t, mm) are related by Unwin's formula as___________________?
Correct answer: B. d = 1.6 √t
- A. d = 1.1 t
- B. d = 1.6 √t
- C. d = 1.5 t
- D. d = 3 √t
Explanation
Unwin’s formula for the rivet-hole diameter is d = 1.6√t, with both d and t in millimetres. The square-root dependence is the key feature, not a direct proportionality to plate thickness.
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