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Speed classification of steam engines: categorize an engine running between 100 and 250 r.p.m. Context: Slow, medium, and high-speed steam engines are classified by crankshaft rpm bands in classic practice. Select the correct class for 100–250 r.p.m.

Q: Speed classification of steam engines: categorize an engine running between 100 and 250 r.p.m. Context: Slow, medium, and high-speed steam engines are classified by crankshaft rpm bands in classic practice. Select the correct class for 100–250 r.p…

Concept Typical classification places engines of about 100–250 r.p.m. in the medium-speed category. Slower machines (e.g., < 100 r.p.m.) are slow-speed; much faster units are high-speed types.

Difficulty: Easy

Slow speed engine
Medium speed steam engine
High speed steam engine
None of these

Correct Answer: Medium speed steam engine

Explanation:

Concept
Typical classification places engines of about 100–250 r.p.m. in the medium-speed category. Slower machines (e.g., < 100 r.p.m.) are slow-speed; much faster units are high-speed types.

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