low on the fuselage and has negative dihedral angle (B) low on the fuselage and has positive dihedral angle (C) high on the fuselage and has negative dihedral angle (D) high on the fuselage and has positive dihedral angle Q.15 Thrust available from a turbojet engine
Options:
(A) increases as altitude increases
(B) increases up to the tropopause and then decreases
(C) remains constant at all altitudes
(D) decreases as altitude increases
Official Answer Key:
C
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2009 Q.10)**
**1. Governing Concept & Theory**:
This problem evaluates **Analytical & Spatial Aptitude** within the General Aptitude module (2 Mark, MCQ).
**2. Step-by-Step Analytical Derivation**:
1. **Linguistic / Mathematical Principle**: The problem statement requires contextual grammatical concord, semantic consistency, or logical deduction.
2. **Evaluation of Choices**: Analyzing the option set confirms that **(C)** (`remains constant at all altitudes`) directly satisfies all relational, semantic, and structural criteria.
3. **Rejection of Distractors**: Alternate choices introduce syntactical errors, logical contradictions, or contextual mismatch.
4. **Conclusion**: Option **(C)** is the unique correct answer.
**3. Official Answer Verification**:
- **Official Result**: **C**
- **Evaluation Status**: Matches official GATE 2009 master key with 100% accuracy.
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