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MCQs

Total Questions : 1798 | Page 3 of 180 pages
Question 21. The cutting fluid mostly used for machining steel is
  1.    Water
  2.    Soluble oil
  3.    Dry
  4.    Heavy oils
 Discuss Question
Answer: Option B. -> Soluble oil
Question 22. The tool life is said to be over if
  1.    Poor surface finish is obtained
  2.    There is sudden increase in cutting forces and power consumption
  3.    Overheating and fuming due to heat of friction starts
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 23. The point angle of a drill, for drilling stainless steel, is
  1.    90°
  2.    118°
  3.    135°
  4.    150°
 Discuss Question
Answer: Option C. -> 135°
Question 24. Chip breakers are used to
  1.    Increase tool life
  2.    Remove chips from bed
  3.    Break the chips into short segments
  4.    To minimize heat generation
 Discuss Question
Answer: Option C. -> Break the chips into short segments
Question 25. In American Standard Association (ASA) system, if the tool nomenclature is 8-6-5-5-10-15-2 mm, then the side rake angle will be
  1.    5°
  2.    6°
  3.    8°
  4.    10°
 Discuss Question
Answer: Option B. -> 6°
Question 26. Negative rakes are used for
  1.    Carbide tools
  2.    Heavy loads
  3.    Harder materials
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 27. Which of the following operations is carried out at a minimum cutting velocity if the machines are equally rigid and the tool work materials are the same?
  1.    Turning
  2.    Grinding
  3.    Boring
  4.    Milling
 Discuss Question
Answer: Option D. -> Milling
Question 28. Internal or external threads of different pitches can be produced by
  1.    Pantograph milling machine
  2.    Profiling machine
  3.    Planetary milling machine
  4.    Piano miller
 Discuss Question
Answer: Option C. -> Planetary milling machine
Question 29. A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen and is used for fusion welding of steel and cast iron, is
  1.    Carburizing flame
  2.    Oxidizing flame
  3.    Oxy-acetylene flame
  4.    Neutral flame
 Discuss Question
Answer: Option D. -> Neutral flame
Question 30. A shaft has a dimension, φ9 +0.025⁺⁰∙⁰⁰⁹, the respective values of fundamental deviation and tolerance are
  1.    −0.025, ±0.008
  2.    −0.025, 0.016
  3.    −0.009, ± 0.008
  4.    −0.009, 0.016
 Discuss Question
Answer: Option D. -> −0.009, 0.016

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