Question Statement:
Which one of the following engines should be used by a subsonic passenger transport airplane for minimum specific fuel consumption?
Options:
-
(A) Turbojet engine with afterburner
-
(B) Turbofan engine
-
(C) Ramjet engine
-
(D) Scramjet engine
Step-by-Step Solution & Explanation
### **Dedicated Step-by-Step Solution (GATE AE 2007 Q.1)**
**1. Problem Statement & Parameters**:
- **Module**: General Aptitude (1 Mark, MCQ)
- **Topic**: Verbal Aptitude (Grammar & Vocabulary)
- **Organizing Institute**: IIT Kanpur
- **Problem Statement**:
> Which one of the following engines should be used by a subsonic passenger transport airplane for minimum specific fuel consumption?
**2. Mathematical Derivation & Physical Analysis**:
1. **Governing Physical Principles**:
Governed by **Verbal Aptitude** (Grammar & Vocabulary) under *General Aptitude*. 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 **B**.
**3. Comprehensive Options Analysis**:
- **(A)** *"Turbojet engine with afterburner"*: ❌ **INCORRECT**.
- **(B)** *"Turbofan engine"*: ✅ **CORRECT**.
- **(C)** *"Ramjet engine"*: ❌ **INCORRECT**.
- **(D)** *"Scramjet engine"*: ❌ **INCORRECT**.
**4. Official Answer Verification**:
- **Official Master Answer**: **B**
- **Evaluation Status**: Matches official GATE 2007 (IIT Kanpur) master answer key with 100% precision.
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