During burning of grain boundaries

Metallurgy Mcqs
BILAL KHATTAK0

A.regions enriched in carbon are formed in first state of burning
B.non-oxidized cavities and blow holes are formed during second stage
C.iron oxide inclusions are formed in third stage
D.All of the above

Related Mcqs:

  1. If dross and slag along with the liquid metal reach the mould cavity they produce the defect known as_______________?
  2. Hydrological types of burning are:
  3. Which of the following statements is not correct?
  4. Which of the following holes appear on the surface of the casting when it is machined?
  5. If ash content of coke used in cupola is high then
  6. Carbon steel is
  7. Ozone layer of upper atmosphere is being destroyed by:?
  8. What are the chief pollutants of the atmosphere which are most likely to deplete the ozone layer??
  9. Which of the following chemicals is responsible for the depletion of ozone layer in the atmosphere?
  10. Rust of iron is

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