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Type classification: De Laval turbine Classify the De Laval turbine according to type and staging. Choose the correct option.

Difficulty: Easy

Single-rotor impulse turbine
Multi-rotor impulse turbine
Impulse–reaction turbine
None of these

Correct Answer: Single-rotor impulse turbine

Explanation:

Concept
The classic De Laval machine is a single-stage, single-rotor impulse turbine with a convergent–divergent nozzle and one ring of moving blades. All pressure drop occurs in the nozzle; the rotor extracts kinetic energy only.

Final Answer
Single-rotor impulse turbine

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