Project ForgeManufacturing Engineering
Machining Processes
GATE 2007
Medium
In electrodischarge machining (EDM), if the thermal conductivity of the tool is high and the specific heat of the workpiece is low, then the tool wear rate and material removal rate are expected to be respectively
- Ahigh and high
- Blow and low
- Chigh and low
- low and high
Explanation
A high tool thermal conductivity conducts heat away from the tool's surface quickly, reducing local melting/erosion of the tool — low tool wear rate. A low workpiece specific heat means the workpiece heats up (and erodes) more readily for the same energy input — high material removal rate.
Source: GATE ME 2007 (2007)
This question is part of a 15-day revision cycle — sign in and Project Forge will bring it back the day before you'd forget it.