Lakshya Education MCQs

Question: In metal machining, the work-tool contact zone is a zone where heat is generated due to
Options:
A. Plastic deformation of metal
B. Burnishing friction
C. Friction between the moving chip and the tool face
D. None of the above
Answer: Option B
Explanation :

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More Questions on This Topic :

Question 1. The different spindle speeds on a lathe form
  1.     Arithmetical progression
  2.     Geometrical progression
  3.     Harmonical progression
  4.     Any one of these
Answer: Option B
Question 2. The percentage of carbon in gray cast iron is in the range of
  1.     0.25 to 0.75 percent
  2.     1.25 to 1.75 percent
  3.     3 to 4 percent
  4.     8 to 10 percent
Answer: Option C
Question 3. A better machinable metal is one which gives
  1.     Lower chip-tool contact area and larger shear angle
  2.     Higher chip-tool contact area and smaller shear angle
  3.     Lower chip-tool contact area and smaller shear angle
  4.     Higher chip-tool contact area and larger shear angle
Answer: Option A
Question 4. The snag grinding is done
  1.     To produce good surface finish and high degree of accuracy
  2.     To remove considerable amount of metal without regard to accuracy of the finished surface
  3.     To grind exterior cylindrical surfaces
  4.     Any one of the above
Answer: Option B
Explanation :
Question 5. The operation of smoothing and squaring the surface around a hole is known as
  1.     Counter-sinking
  2.     Counter-boring
  3.     Trepanning
  4.     Spot facing
Answer: Option D
Explanation :
Question 6. A diamond locating pin is used in jigs and fixtures because
  1.     Diamond is very hard and wear resistant
  2.     It occupies very little space
  3.     It helps in assembly with tolerance on centre distance
  4.     It has a long life
Answer: Option C
Explanation :

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