Which type of fit would likely be used for parts that must be easily attached and detached?

Clearance fit is indeed the appropriate choice for parts that must be easily attached and detached. This type of fit allows for a space between the parts to ensure that they can slide or move relative to one another without any interference. The primary characteristic of a clearance fit is that it provides enough room to facilitate ease of assembly or disassembly, while still allowing for adequate functionality when the parts are in use.

In applications where components need to be frequently manipulated or replaced, such as in machinery, tools, or modular designs, a clearance fit is essential. It ensures that parts can be smoothly inserted and removed, reducing wear and tear during assembly or disassembly stages.

Other types of fits, such as interference fit or fixed fit, involve tighter tolerances and more friction between the parts, making them unsuitable for situations requiring frequent attachment and detachment. An equally tolerant fit could potentially provide the necessary clearances, but it might not guarantee the same level of ease in assembly as a clearance fit does.