Question Bank • QB_FM_111
MSQ • 2 Marks
Section 2: Farm Machinery
Farm Machinery
Subtopic: Calculation of performance parameters – field capacity, efficiency, performance index, application rate and losses
Question Statement:
Which of the following operational factors cause an increase in wheel slip of an agricultural tractor operating with a draft implement?
Options:
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(A) Increase in plow depth of cut
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(B) Wet, slick soil conditions on the surface
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(C) Addition of rear wheel ballast weights
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(D) Decreased tire inflation pressure within permissible limits on soft soil
Step-by-Step Solution & Explanation
- A: Increasing depth increases plow draft force, directly raising required tractive effort and increasing slip.
- B: Wet surface reduces the coefficient of traction $\mu$, causing higher slip.
- C: Adding ballast increases normal load on drive wheels, increasing traction and reducing slip.
- D: Decreasing tire pressure in soft soil increases tire contact footprint, improving traction and reducing slip.
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