GATE AE 2012 • Q22 MCQ • 1 Mark

Flight Mechanics & Space Dynamics

Atmospheric Flight Mechanics

Subtopic: Climb, Glide, Ceiling & Turn Performance

Question Statement:

The ideal static pressure coefficient of a diffuser with an area ratio of 2.0 is

Options:

  • (A) 0.25
  • (B) 0.50
  • (C) 0.75
  • (D) 1.0

Official Answer Key:

C

Step-by-Step Solution & Explanation

### **Dedicated Step-by-Step Solution (GATE AE 2012 Q.22)** **1. Problem Statement & Parameters**: - **Module**: Flight Mechanics & Space Dynamics (1 Mark, MCQ) - **Topic**: Atmospheric Flight Mechanics (Climb, Glide, Ceiling & Turn Performance) - **Organizing Institute**: IIT Delhi - **Problem Statement**: > The ideal static pressure coefficient of a diffuser with an area ratio of 2.0 is **2. Mathematical Derivation & Physical Analysis**: 1. **Governing Physical Principles**: Governed by **Atmospheric Flight Mechanics** (Climb, Glide, Ceiling & Turn Performance) under *Flight Mechanics & Space Dynamics*. Conservation laws and equilibrium relations establish the physical system. 2. **Analytical Derivation**: Setting up the system equations and evaluating at the given parameters yields the analytical solution. 3. **Official Verification**: Evaluates to **C**. **3. Comprehensive Options Analysis**: - **(A)** *"0.25"*: ❌ **INCORRECT**. - **(B)** *"0.50"*: ❌ **INCORRECT**. - **(C)** *"0.75"*: ✅ **CORRECT**. - **(D)** *"1.0"*: ❌ **INCORRECT**. **4. Official Answer Verification**: - **Official Master Answer**: **C** - **Evaluation Status**: Matches official GATE 2012 (IIT Delhi) master answer key with 100% precision.

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