[Linked 52–53] Net traction developed in kN by the rear wheels when fitted with 13.6–28 12PR tyre at normal inflation pressure on a level ground with 15% wheel slip will be
Options:
(A) 8.79
(B) 9.18
(C) 9.78
(D) 10.32
Official Answer Key:
A
Step-by-Step Solution & Explanation
Using the Wismer–Luth traction equations with C_n = 78.4 (from Q52) and slip s = 0.15: gross traction coefficient μ = 0.75[1−e^(−0.3·C_n·s)] = 0.75[1−e^(−3.53)] = 0.728. Motion resistance ratio (Q52) = 0.0528. Net traction coefficient = 0.728 − 0.0528 = 0.675. Rear-wheel load = 13.0 kN, so total net traction = 0.675 × 13.0 = 8.78 ≈ 8.79 kN.
Section 4 — Soil and Water Conservation Engineering
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