Q. Dispersion hardening materials can be produced with the help of followinf process

  • (A) forging
  • (B) rolling
  • (C) powder metallurgy
  • (D) none of the above
πŸ’¬ Discuss
βœ… Correct Answer: (C) powder metallurgy

Q. in case of carbonitriding by diffusion of which elements the surface become harder of the metal

  • (A) only carbon
  • (B) carbon and nitrogen
  • (C) only nitrogen
  • (D) none of the above
πŸ’¬ Discuss
βœ… Correct Answer: (B) carbon and nitrogen

Q. in case of flame hardening the heat source in the form of

  • (A) lpg gas flame
  • (B) furnace oil flame
  • (C) oxy-acetelene flame
  • (D) none of the above
πŸ’¬ Discuss
βœ… Correct Answer: (C) oxy-acetelene flame

Q. in jominy end quench test sample is quenched by

  • (A) water
  • (B) oil
  • (C) brine water
  • (D) all of the above
πŸ’¬ Discuss
βœ… Correct Answer: (A) water

Q. martempering is also known as

  • (A) marheating
  • (B) marcooling
  • (C) marquenching
  • (D) none of the above
πŸ’¬ Discuss
βœ… Correct Answer: (C) marquenching

Q. In martempering heat treatment, the final phase which obtain

  • (A) ferrite
  • (B) austenite
  • (C) pearlite
  • (D) none of the above
πŸ’¬ Discuss
βœ… Correct Answer: (D) none of the above

Q. In petenting process, which is the final phase obtainafter completion of heat treatment

  • (A) pearlite
  • (B) bainite
  • (C) martensite
  • (D) austenite
πŸ’¬ Discuss
βœ… Correct Answer: (A) pearlite

Q. which of the following metal alloy is suitable for the precipitation hardenable alloy.

  • (A) al-zn
  • (B) al-ni
  • (C) al-cr
  • (D) al-cu
πŸ’¬ Discuss
βœ… Correct Answer: (D) al-cu

Q. Pearlite is harder than ferrite,this statement is-------

  • (A) true
  • (B) false
  • (C) not applicable
  • (D) none of the above
πŸ’¬ Discuss
βœ… Correct Answer: (A) true

Q. Cementite is harder than pearlite,this statement id -------

  • (A) false
  • (B) true
  • (C) not applicable
  • (D) none of the above
πŸ’¬ Discuss
βœ… Correct Answer: (B) true

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