Question

Match List-I with List-II.

List-I	List-II
A. 50% reaction stage B. Pressure-velocity compounded impulse stage C. Single stage impulse D. Two stage pressure compounded turbine	I. Rateau II. Parsons III. Curtis IV. De-Laval

• A. A-I, B-III, C-II, D-IV
• B. A-II, B-III, C-IV, D-I
• C. A-II, B-I, C-IV, D-III
• D. A-IV, B-II, C-I, D-III

Hint:

Parsons → 50% reaction, Curtis → velocity compounding, Rateau → pressure compounding.

Answer 1

The Correct Option is B

Concept: Steam turbine stages are classified based on compounding and reaction principles.

Step 1: 50% reaction stage (A).

• Reaction turbine with equal pressure drop in stator and rotor
• Known as Parsons turbine Thus: \[ A \rightarrow II \]

Step 2: Pressure-velocity compounded impulse (B).

• Combination of pressure and velocity compounding
• Known as Curtis stage Thus: \[ B \rightarrow III \]

Step 3: Single stage impulse (C).

• Simple impulse turbine
• Known as De-Laval turbine Thus: \[ C \rightarrow IV \]

Step 4: Two-stage pressure compounded turbine (D).

• Multiple pressure stages
• Known as Rateau turbine Thus: \[ D \rightarrow I \]

Step 5: Final matching.
\[ A-II,\; B-III,\; C-IV,\; D-I \] \[ \boxed{\text{Answer: Option (2)}} \]