Discussion
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- Question
The relief or clearance at the cutting edge of a flat drill varies from
Options- A. 3° to 8°
- B. 20° to 30°
- C. 60° to 90°
- D. 90° to 120°
- Correct Answer
- 3° to 8°
- 1. The specific cutting energy used for establishing the machinability of the metal depends upon its
Options- A. coefficient of friction
- B. microstructure
- C. work hardening characteristics
- D. all of these Discuss
- 2. Which of the following statement is correct in regard to centreless grinding?
Options- A. The workpiece is supported throughout its entire length as grinding takes place.
- B. It is a continuous process and adopted for production work.
- C. It requires no holding device for the work.
- D. all of the above Discuss
- 3. The tool life is said to be over if
Options- A. poor surface finish is obtained
- B. there is sudden increase in cutting forces and power consumption
- C. overheating and fuming due to heat of friction starts
- D. all of the above Discuss
- 4. In __________ operation, the cutting force is maximum when the tooth begins its cut and reduces it to minimum when the tooth leaves the work.
Options- A. up milling
- B. down milling
- C. face milling
- D. end milling Discuss
- 5. The time (in minutes) for a drilling a hole is given by
where h is the
Options- A. length of the drill
- B. drill diameter
- C. flute length of the drill
- D. cone height of the drill Discuss
- 6. When the shear angle is large
Options- A. path of shear is short and chip is thin
- B. path of shear is large and chip is thick
- C. path of shear is short and chip is thick
- D. path of shear is large and chip is thin Discuss
- 7. In drilling aluminium, a drill with
Options- A. zero helix angle is used
- B. low helix angle is used
- C. high helix angle is used
- D. any helix angle can be used Discuss
- 8. Internal or external threads of different pitches can be produced by
Options- A. pantograph milling machine
- B. profiling machine
- C. planetary milling machine
- D. piano-miller Discuss
- 9. In drilling softer materials, the cutting speed is __________ as compared to harder materials.
Options- A. same
- B. low
- C. high Discuss
- 10. Gear finishing operation is called
Options- A. shaping
- B. milling
- C. hobbing
- D. burnishing Discuss
Production Engineering problems
Search Results
Correct Answer: all of these
Correct Answer: all of the above
Correct Answer: all of the above
Correct Answer: down milling
Correct Answer: cone height of the drill
Correct Answer: path of shear is short and chip is thin
Correct Answer: high helix angle is used
Correct Answer: planetary milling machine
Correct Answer: high
Correct Answer: burnishing
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