Discussion
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- Question
In metal machining, the zone where the maximum heat is generated due to the plastic deformation of metal, is called
Options- A. friction zone
- B. work-tool contact zone
- C. shear zone
- D. none of these
- Correct Answer
- shear zone
- 1. The aluminium oxide abrasive is chiefly used for grinding
Options- A. high speed steel
- B. carbon steel
- C. wrought iron
- D. all of these Discuss
- 2. The tool life is __________ cutting speed.
Options- A. independent of
- B. dependant upon Discuss
- 3. The taper on the lathe spindle is
Options- A. 1 in 10
- B. 1 in 15
- C. 1 in 20
- D. 1 in 30 Discuss
- 4. A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through-hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is
Options- A. 0.2 mm
- B. 10 mm
- C. 20 mm
- D. 100 mm Discuss
- 5. The average cutting speed for turning mild steel with a high speed steel tool is
Options- A. 15 to 19 m/min
- B. 25 to 31 m/min
- C. 60 to 90 m/min
- D. 90 to 120 m/min Discuss
- 6. In a shaper
Options- A. tool is stationary and work reciprocates
- B. work is stationary and tool reciprocates
- C. tool moves over stationary work
- D. tool moves over reciprocating work Discuss
- 7. The operation of making a cone-shaped enlargement of the end of a hole is known as
Options- A. counter-sinking
- B. counter-boring
- C. trepanning
- D. spot facing Discuss
- 8. The method of grinding used to produce internal cylindrical holes and tapers, is
Options- A. internal cylindrical grinding
- B. form grinding
- C. external cylindrical grinding
- D. surface grinding Discuss
- 9. For turning small taper on long workpiece, the suitable method is
Options- A. by a form tool
- B. by setting over the tail stock
- C. by a taper turning attachment
- D. by swivelling the compound rest Discuss
- 10. The shear velocity is the velocity of
Options- A. tool relative to the workpiece
- B. chip relative to the tool
- C. tool along the tool face
- D. none of these Discuss
Production Engineering problems
Search Results
Correct Answer: all of these
Correct Answer: dependant upon
Correct Answer: 1 in 20
Correct Answer: 20 mm
Correct Answer: 25 to 31 m/min
Correct Answer: work is stationary and tool reciprocates
Correct Answer: counter-sinking
Correct Answer: internal cylindrical grinding
Correct Answer: by setting over the tail stock
Correct Answer: none of these
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