Allied & ICAR Exam Bank • ALLIED_0867 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: Human engineering and safety considerations in design of tractor and agricultural implements

Question Statement:

According to ISO 2631 standards for human exposure to whole-body vibration on tractors, the crest factor of vibration acceleration is defined as:

Options:

  • (A) The ratio of peak instantaneous acceleration to root-mean-square (RMS) acceleration
  • (B) Average acceleration divided by gravity
  • (C) Frequency divided by amplitude
  • (D) Total vibration exposure time

Answer Key:

A

Step-by-Step Solution & Explanation

Crest factor $= a_{peak} / a_{rms}$. Crest factors above 9 indicate shock and jolting motions requiring specialized vibration metrics.
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