The GATE Grind

GATE 2026 AE – Question 44

Propulsion · Engine performance: ramjet, turbojet, turbofan, turboprop, turboshaft and after-burners · 2 marks · Multiple select

Which of the following process(es) is/are involved in the compression of air in an ideal ramjet engine?

  1. oblique shock
  2. mechanical compression
  3. normal shock
  4. subsonic diffusion

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Show answer and explanation

Correct answer: (A) oblique shock; (C) normal shock; (D) subsonic diffusion

Explanation

A ramjet has no compressor. The supersonic flow is compressed by the intake through oblique shocks, a terminal normal shock, and then subsonic diffusion.