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1. |
Practical dividing line between a ductile and brittle materials is suggested, when the ultimate elongation is about 5%. Generally, larger the knuckle radius, stronger is the corner torus section of a head. The knuckle radius provided should be less than ______________ of the head? |
A. | 6% of I.D. |
B. | 3 times the thickness |
C. | Either A. or B., whichever is larger |
D. | Either A. or B., whichever is smaller |
Answer» D. Either A. or B., whichever is smaller | |