Allied & ICAR Exam Bank • ALLIED_2988 MSQ • 2 Marks

Section 3: Farm Power

Farm Power

Subtopic: I.C. engine cycles

Question Statement:

Which of the following statements regarding the air-standard Dual (Sabathé) cycle are TRUE?

Options:

  • (A) Heat addition occurs partly at constant volume and partly at constant pressure
  • (B) It more closely approximates real high-speed diesel tractor engine indicator diagrams than the pure Diesel cycle
  • (C) It is characterized by pressure ratio $r_p$ and cut-off ratio $r_c$
  • (D) Thermal efficiency increases with higher compression ratio

Answer Key:

A, B, C, D

Step-by-Step Solution & Explanation

Dual cycle models modern diesel combustion where rapid pre-mixed flame burns isochorically and diffusion flame burns isobarically.
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