🔍 Key Concepts

• Clearance fit vs. interference fit – which one has the shaft smaller than the hole, and which one has the shaft equal to or larger than the hole? • Definition of a locational interference fit – typically a small predictable interference, not a heavy press fit and not a loose sliding fit. • Compare the actual dimensions in view A (shaft vs. hole) to the dimensions shown in the other views and to the answer choices.

💭 Think About

• Look carefully at view A: which number belongs to the shaft and which to the hole? Does that give you clearance or interference, and by how much? • For a locational interference fit, do you want a very large interference, a very loose clearance, or a slight controlled overlap between shaft and hole sizes? • Which option changes the dimensions so that the maximum shaft size is just slightly larger than the hole size, giving a light but definite interference?

✅ Before You Answer

• Identify clearly: current clearance or interference in view A (numeric value). • Determine what range of shaft diameters each answer choice would produce in relation to the 0.250‑inch hole. • Verify which choice results in small, controlled interference (not 0.005 in clearance and not 0.005 in heavy interference).