Discussion
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- Question
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
- Correct Answer
- 25 to 31 m/min
- 1. In centreless grinders, the regulating wheel is inclined at
Options- A. 0° to 8°
- B. 9° to 15°
- C. 16° to 20°
- D. 21° to 25° Discuss
- 2. In __________ operation, the chip thickness is minimum at the beginning of the cut and it reaches to the maximum when the cut terminates.
Options- A. conventional milling
- B. climb milling
- C. face milling
- D. end milling Discuss
- 3. The tail stock and the carriage of a lathe may be guided on same or different guideway.
Options- A. True
- B. False Discuss
- 4. Spot facing is an operation of smoothing and squaring the surface around a hole.
Options- A. True
- B. False Discuss
- 5. Ceramic cutting tools are
Options- A. made by cold pressing of aluminium oxide powder
- B. available in the form of tips
- C. brittle and have low bending strength
- D. all of these Discuss
- 6. 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
- 7. 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
- 8. The tool life is __________ cutting speed.
Options- A. independent of
- B. dependant upon Discuss
- 9. 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
- 10. 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 Discuss
Production Engineering problems
Search Results
Correct Answer: 0° to 8°
Correct Answer: conventional milling
Correct Answer: True
Correct Answer: True
Correct Answer: all of these
Correct Answer: 20 mm
Correct Answer: 1 in 20
Correct Answer: dependant upon
Correct Answer: all of these
Correct Answer: shear zone
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