Discussion
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- Question
In electro-discharge machining, tool is made of
Options- A. brass
- B. copper
- C. copper tungsten alloy
- D. all of these
- Correct Answer
- all of these
- 1. The tool life is affected by
Options- A. depth of cut
- B. cutting speed
- C. feed
- D. all of these Discuss
- 2. Slow speed of the spindle is necessary in
Options- A. thread cutting
- B. turning a work of larger diameter
- C. turning a hard or tough material
- D. all of these Discuss
- 3. Which of the following statement is wrong?
Options- A. The larger side rake angle produces chipping.
- B. The smaller rake angle produces excessive wear and deformation in tool.
- C. The side cutting edge angle (less than 15°) increases tool life.
- D. The increase in nose radius decreases tool life. Discuss
- 4. The hole drilled for tapping should be smaller than the tap size by twice the depth of thread.
Options- A. Agree
- B. Disagree Discuss
- 5. Flank wear occurs mainly on the
Options- A. nose part, front relief face and side relief face of the cutting tool
- B. face of the cutting tool at a short distance from the cutting edge
- C. cutting edge only
- D. front face only Discuss
- 6. The cutting speed is maximum while machining __________ with a high speed steel tool.
Options- A. cast iron
- B. mild steel
- C. brass
- D. aluminium Discuss
- 7. Relief angles on high speed steel tools usually vary from
Options- A. 0° to 3°
- B. 3° to 10°
- C. 10° to 20°
- D. 20° to 30° Discuss
- 8. The lip clearance angle is the angle formed by the
Options- A. leading edge of the land with a plane having the axis of the drill
- B. flank and a plane at right angles to the drill axis
- C. chisel edge and the lip as viewed from the end of a drill
- D. none of the above Discuss
- 9. In reaming process
Options- A. metal removal rate is high
- B. high surface finish is obtained
- C. high form accuracy is obtained
- D. high dimensional accuracy is obtained Discuss
- 10. The cutting angle of a flat drill varies from
Options- A. 3° to 8°
- B. 20° to 30°
- C. 60° to 90°
- D. 90° to 120° Discuss
Production Engineering problems
Search Results
Correct Answer: all of these
Correct Answer: all of these
Correct Answer: The increase in nose radius decreases tool life.
Correct Answer: Agree
Correct Answer: nose part, front relief face and side relief face of the cutting tool
Correct Answer: aluminium
Correct Answer: 20° to 30°
Correct Answer: flank and a plane at right angles to the drill axis
Correct Answer: high form accuracy is obtained
Correct Answer: 90° to 120°
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