Allied & ICAR Exam Bank • ALLIED_0259 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: Power efficiencies and measurement, engine performance curves

Question Statement:

Friction power in internal combustion engines increases most significantly with an increase in:

Options:

  • (A) Engine rotational speed (RPM)
  • (B) Ambient humidity
  • (C) Tractor tire inflation pressure
  • (D) Exhaust muffler diameter

Answer Key:

A

Step-by-Step Solution & Explanation

Hydrodynamic shear losses in bearings and cylinder rings scale non-linearly with engine rotational speed ($FP \propto N^2$).
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