Q.1
Copper is not used for making electrode wires in wire cut EDM because of its _____
  • a) Good conductivity
  • b) lower tensile strength
  • c) high melting point
  • d) higher purchasing cost
Q.2
Which of the following materials is not used for electrode wires?
  • a) Molybdenum
  • b) Brass
  • c) Steel
  • d) Graphite
Q.3
Selection of the wire is based on how many factors?
  • a) 2
  • b) 3
  • c) 4
  • d) 5
Q.4
The diameter of the electrode wire is in the range of _____
  • a) 0.001″ – 0.0035″
  • b) 0.003″ – 0.004″
  • c) 0.004″ – 0.014″
  • d) 0.020″ – 0.032″
Q.5
After originating from a supply spool, the wire is passed through _____
  • a) a chamber filled with special stones
  • b) diamond guides
  • c) a furnace
  • d) a container filled with anti-oxidant
Q.6
With the addition of the programmable _____ to wire cut EDM machine, workpieces of different thicknesses can be machined.
  • a) X-axis
  • b) Y-axis
  • c) Z-axis
  • d) chuck
Q.7
In a wire break situation, the end of the wire is_____ while the supply wire is _____
  • a) clamped, drawn back
  • b) drawn back, clamped
  • c) dipped in the di-electric fluid, clamped
  • d) welded with the other wire, drawn back
Q.8
The automatic wire threading offers the ability to cut multiple openings in a workpiece without operator intervention.
  • a) True
  • b) False
Q.9
If there is a wire break during machining, the machine returns to the start point.
  • a) True
  • b) False
Q.10
After a wire break, the wire tip segment that was clamped is disposed off in a wire tip disposal unit.
  • a) True
  • b) False
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