Ultrasonic machining (USM): identify the incorrect statement Evaluate the properties of USM for hard/brittle materials (e.g., glass, ceramics). Choose the statement that is <em>wrong</em> for ultrasonic machining.
Mechanical Engineering
Production Engineering
Difficulty: Medium
Choose an option
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AIt is best suited for machining hard and brittle materials.
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BIt cuts materials at very slow material removal rates.
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CIt removes large amount of material quickly.
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DIt can produce good surface finish and intricate shapes.
Answer
Correct Answer: It removes large amount of material quickly.
Explanation
Given / ConceptUSM uses high-frequency vibrations with an abrasive slurry to micro-chisel brittle materials. It is non-thermal and well-suited to glass, carbides, and ceramics.
Why option (c) is wrongUSM has low MRR compared to conventional cutting or grinding; it does not remove large amounts of material rapidly.
Validation of other options(a) True — ideal for brittle, hard materials.(b) True — MRR is slow.(d) True — produces fine features and good finishes without heat-affected zones.
Final AnswerIt removes large amount of material quickly.