The tool life is said to be over if

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

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. Soft materials can not be economically ground due to
  2. A tool used to withdraw a drill from the sleeve is called
  3. The process of removing metal by a cutter which is rotated in the same direction of travel of workpiece,…
  4. The lead screw of a lathe has _________ threads.
  5. In which of the following milling machine, the table can be tilted in a vertical plane by providing…
  6. The tool may fail due to
  7. In a planer
  8. In DC arc welding, if leads are arranged in work as Negative pole of the welding arc and electrode as…
  9. Ultrasonic machining is best suited for
  10. The floating position of the holding fixture in a rotary transfer device is used to
  11. For softer materials, the point angle of the drill is kept
  12. The cutting speed for drilling aluminium, brass and bronze with carbon steel drills is _________ cutting…
  13. In Oxyacetylene gas welding, temperature at the inner cone of the flame is around
  14. The facing is an operation of
  15. The ratio between two consecutive spindle speeds for a six-speed drilling machine using drills of diameter…
  16. The chamfering is an operation of
  17. The aluminium oxide abrasive is chiefly used for grinding
  18. Which of the following parameters govern the value of shear angle in continuous chip formation?
  19. The high cutting speed and large rake angle of the tool will result in the formation of
  20. The grooving is an operation of
  21. EDM machining is applied for
  22. The maximum possible draft in cold rolling of sheet increases with the
  23. A grinding wheel is said to be of _________ if it holds the abrasive grains more securely.
  24. The actual feed in centerless grinders is given by (where d = Dia. of regulating wheel, n = Revolutions…
  25. In _________ operation, the cutting force is maximum when the tooth begins its cut and reduces it to…
  26. In oblique cutting of metals, the cutting edge of the tool is
  27. The width of cutting edge of a parting off tool varies from
  28. Which among the NC operations given below are continuous path operations? Arc Welding (AW), Drilling…
  29. In a shaper, the length of stroke is increased by
  30. The main purpose of a boring operation, as compared to drilling, is to