Difficulty: Easy
Correct Answer: Glass
Explanation:
Introduction / Context:
Ultrasonic machining is a non-thermal, non-electrochemical process that removes material by micro-chipping with abrasive slurry agitated at ultrasonic frequency. It excels on hard, brittle, non-conductive materials.
Given Data / Assumptions:
Concept / Approach:
USM is particularly effective for brittle materials (glass, ceramics, carbides) where conventional tools would wear rapidly or cause cracking. Among the options, glass is prototypical: hard, brittle, and non-conductive, making USM ideal. While USM also machines sintered carbides, it is not preferred for ductile tool steels.
Step-by-Step Solution:
Verification / Alternative check:
Applications include drilling glass, ceramics, sapphire, and ferrites with minimal edge chipping compared to conventional drilling.
Why Other Options Are Wrong:
Common Pitfalls:
Confusing the broad capability with best suitability; “best” refers to the class where USM clearly outperforms traditional cutting.
Final Answer:
Glass
Discussion & Comments