Allied & ICAR Exam Bank • ALLIED_3054 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: Power efficiencies and measurement, engine performance curves

Question Statement:

Mechanical efficiency of an internal combustion tractor engine system #7 is defined as the ratio of:

Options:

  • (A) Brake power (bp) to Indicated power (ip): eta_m = bp / ip
  • (B) Indicated power to Brake power
  • (C) Brake power to Fuel heat energy
  • (D) Drawbar power to PTO power

Answer Key:

A

Step-by-Step Solution & Explanation

Mechanical efficiency measures internal friction losses: eta_m = bp / ip = (ip - fp) / ip.
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