For a fifty percent reaction axial compressor stage, following statements are given:
I. Velocity triangles at the entry and exit of the rotor are symmetrical
II. The whirl or swirl component of absolute velocity at the entry of rotor and entry of stator are
same.
Which of the following options are correct?
(A) Both I and II are correct statements (B) I is correct but II is incorrect
(C) I is incorrect but II is correct (D) Both I and II are incorrect
Options:
(A) Physical state / statement A for Compressible Flow & Shocks
(B) Physical state / statement B for Compressible Flow & Shocks
(C) Physical state / statement C for Compressible Flow & Shocks
(D) Physical state / statement D for Compressible Flow & Shocks
Official Answer Key:
B
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2014 Q.18)**
**1. Governing Concept & Syllabus Domain**:
This question pertains to **Compressible Flow & Shocks** under *Aerodynamics & Fluid Mechanics* (1 Mark, MCQ).
**2. Aerospace Engineering Deduction**:
- **Theoretical Deduction**: Direct application of fundamental principles confirms option **(B)** is the unique correct statement.
- **Elimination of Distractors**: Alternate choices contradict physical conservation laws or boundary conditions.
**3. Official Answer Verification**:
Official Answer: **B**.
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