Steel cannot be hardened unless it is heated

Engineering Materials Mcqs
BILAL KHATTAK0

A.Above the lowest critical point
B.Above the middle critical point
C.Above the highest critical point
D.Between the first and second critical point
E.Between the second and third critical point

Related Mcqs:

  1. The time of day when the relative humidity reaches a maximum value is usually ___________?
  2. For normalizing, steel is heated to
  3. In a series circuit with unequal resistances, the __________?
  4. Range’ is the measurement between:
  5. The essential gradient of any hardened steel is
  6. When piece of 0.2% carbon steel is heated above third critical point the steel is a solid solution of carbon in gamma iron and called
  7. Steel balls for ball bearings are hardened to
  8. A steel specimen is heated to 730?C and cooled at the slowest possible rate in the furnace. Which property will be imparted to the steel piece?
  9. The process of reheating the hardened steel to some temperature below the critical range, followed by any rate of cooling is known as
  10. In normalising steel is heated 40-50 C

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