Question Bank • QB_EXP_FP_CYC_014 MSQ • 2 Marks

Section 3: Farm Power

Sources of Power

Subtopic: Thermodynamic cycles of IC engines

Question Statement:

Referring to the four thermodynamic processes depicted in the accompanying Diesel cycle P-v diagram, which of the following statements is/are correct?

Options:

  • (A) Process 1-2 represents reversible adiabatic (isentropic) compression of pure air
  • (B) Process 2-3 represents constant pressure (isobaric) heat addition
  • (C) Process 3-4 represents reversible adiabatic (isentropic) expansion
  • (D) Process 4-1 represents constant volume (isochoric) heat rejection

Answer Key:

A, B, C, D

Step-by-Step Solution & Explanation

The ideal air-standard Diesel cycle consists of: 1-2 isentropic compression; 2-3 isobaric heat addition; 3-4 isentropic expansion; 4-1 isochoric heat rejection. All four statements are correct.
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