it is a harrow with peg shaped teeth of diamond cross section to a Rectangular frame. A) Spike tooth harrow C Spring tooth harrow B) Acme harrow D Triangular harrow.

it is a harrow with peg shaped teeth of diamond cross section to a Rectangular frame. A) Spike tooth harrow C Spring tooth harrow B) Acme harrow D Triangular harrow.
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Spike tooth harrow
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is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The maximum stress in the beam, subjected to a maximum bending moment , is (A) f = (P/A) + (Z/M) (B) f = (A/P) + (M/Z) (C) f = (P/A) + (M/Z) (D) f = (P/A) + (M/6Z)

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Last Answer : Answer: Option C