Allied & ICAR Exam Bank • ALLIED_1121 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: Tractor Ergonomics

Question Statement:

The ISO 2631 standard for whole-body vibration evaluation in tractor operators indicates human body sensitivity is highest in the frequency range of:

Options:

  • (A) 4 Hz to 8 Hz in vertical z-axis direction
  • (B) 50 Hz to 100 Hz
  • (C) 0.1 Hz to 0.5 Hz
  • (D) 200 Hz to 500 Hz

Answer Key:

A

Step-by-Step Solution & Explanation

The resonance frequency of the human torso and spinal column lies between $4\text{ and }8\text{ Hz}$ for vertical ($a_z$) vibration, making this band most critical in tractor seat suspension design.
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