    Sentence 1: Above what horsepower are  steam turbines usually _rilfere efficient  than steam" engined Cg use    reciprocating pistons?    Sentence 2: Steam turbines are generally  more efficient than reciprocating piston  type steam engines Gor outputs akove  several hundred horsepower), have fewer  moving parts, and provide rotary power  directly instead of through a connecting  rod system or similar means.