Allied & ICAR Exam Bank • ALLIED_0857 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: Power efficiencies and measurement, engine performance curves

Question Statement:

Mechanical efficiency $\eta_m$ of an IC engine is defined as the ratio of:

Options:

  • (A) Brake Power to Indicated Power ($\eta_m = \frac{BP}{IP}$)
  • (B) Indicated Power to Brake Power
  • (C) Brake Power to Fuel Power
  • (D) Friction Power to Indicated Power

Answer Key:

A

Step-by-Step Solution & Explanation

Mechanical efficiency is the fraction of total gas expansion power ($IP$) delivered to the engine flywheel ($BP$): $\eta_m = BP / IP$.
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