Subtopic: Type, selection, maintenance and repair of tractors and power tillers
Question Statement:
Which of the following statements regarding tractor drivetrain configurations (2WD vs 4WD/MFWD vs Track-type) is/are correct?
Options:
(A) 4WD (MFWD) tractors utilize front wheel assist to convert a portion of front axle weight into tractive pull, increasing drawbar pull by 15% to 30% over comparable 2WD tractors.
(C) 2WD tractors typically carry approximately 65% to 70% of static weight on the rear axle on level ground.
(D) Rubber-track tractors experience higher wheel slip than wheeled tractors under all soil moisture conditions.
Answer Key:
A, B, C
Step-by-Step Solution & Explanation
• MFWD engages front axle load for extra drawbar pull (A is correct).
• Crawler tracks spread weight over large contact areas, dramatically reducing mean ground pressure (B is correct).
• 2WD static weight distribution typically allocates ~2/3 of weight to rear driving wheels (C is correct).
• Rubber tracks provide vastly superior contact patch area and traction grip, resulting in lower slip, not higher (D is false).