Discussion
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- Question
When the grinding wheel is marked by the letters from I to P, it indicates that the grinding wheel is of hard grade.
Options- A. True
- B. False
- Correct Answer
- False
- 1. In which of the following machine, the work remains stationary and the tool is rotated?
Options- A. Vertical boring machine
- B. Horizontal boring machine
- C. Precision boring machine
- D. Jig boring machine Discuss
- 2. A grinding wheel becomes glazed (i.e. cutting edge takes a glass-like appearance) due to
Options- A. wear of bond
- B. breaking of abrasive grains
- C. wear of abrasive grains
- D. cracks on grinding wheel Discuss
- 3. Chip breakers are used to
Options- A. increase tool life
- B. remove chips from bed
- C. break the chips into short segments
- D. to minimise heat generation Discuss
- 4. Ultra-sonic machining is best suited for
Options- A. tool steels
- B. sintered carbides
- C. glass
- D. all of these Discuss
- 5. A 15 mm drilling machine means that it can drill a hole
Options- A. ofmaximumdiameter 15 mm
- B. in 15 mm thick plates
- C. having cross-sectional area of 15 mm2
- D. none of these Discuss
- 6. The tool material, for faster machining, should have
Options- A. wear resistance
- B. red hardness
- C. toughness
- D. all of these Discuss
- 7. The chamfering is an essential operation after
Options- A. knurling
- B. rough turning
- C. boring
- D. thread cutting Discuss
- 8. An open structure of a grinding wheel is used for
Options- A. soft materials
- B. tough materials
- C. ductile materials
- D. all of these Discuss
- 9. The tap used to cut threads in a blind hole is
Options- A. taper tap
- B. second tap
- C. bottoming tap
- D. any one of these Discuss
- 10. Low helix angle drills are preferred for drilling holes in
Options- A. plastics
- B. copper
- C. cast steel
- D. carbon steel Discuss
Production Engineering problems
Search Results
Correct Answer: Horizontal boring machine
Correct Answer: wear of abrasive grains
Correct Answer: break the chips into short segments
Correct Answer: all of these
Correct Answer: ofmaximumdiameter 15 mm
Correct Answer: all of these
Correct Answer: thread cutting
Correct Answer: all of these
Correct Answer: bottoming tap
Correct Answer: plastics
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