Allied & ICAR Exam Bank • ALLIED_0865 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: I.C. engine systems – fuel, cooling, lubrication, ignition, electrical, intake and exhaust

Question Statement:

The volumetric efficiency $\eta_v$ of a naturally aspirated IC engine is defined as the ratio of:

Options:

  • (A) Actual mass of air drawn into the cylinders during the intake stroke to the theoretical mass of air that would fill the swept volume at ambient temperature and pressure
  • (B) Cylinder bore to stroke length
  • (C) Compression ratio to expansion ratio
  • (D) Swept volume to clearance volume

Answer Key:

A

Step-by-Step Solution & Explanation

Volumetric efficiency measures breathing effectiveness: $\eta_v = \frac{m_{actual}}{\rho_{ambient} V_s}$.
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