Mem- Heat Treatment Practice Test

24 Questions | Total Attempts: 177

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Mem- Heat Treatment Practice Test

Dear Students please take this test as a practice for Heat Treatment Chapter.


Questions and Answers
  • 1. 
    Rapid quenching can be obtained by cooling in______________
    • A. 

      Air             

    • B. 

        oil                   

    • C. 

      Water              

    • D. 

      Brine   

  • 2. 
    A steel piece after hardening is heated to 300 degree celsius and then cooled in oil. The property imparted to the steel piece will be
    • A. 

       Softness          

    • B. 

      Toughness

    • C. 

      Hardness         

    • D. 

      Annealing

  • 3. 
    Annealing is done
    • A. 

      To harden the surface  

    • B. 

      For surface smoothness 

    • C. 

      For relieving stresses  

    • D. 

      To improve microstructure for good surface finish

  • 4. 
    Slowest cooling rate is obtained when steel is quenched in ____________
    • A. 

      Air      

    • B. 

       brine     

    • C. 

       fused salt      

    • D. 

      Water  

  • 5. 
    The effect of austenitic grain size development during heat treatment is
    • A. 

      Lower internal stress 

    • B. 

      Greater toughness     

    • C. 

      Lower hardenability

    • D. 

      All of the above

  • 6. 
    Hardness and tensile strength in austenite stainless steel can be increased by
    • A. 

      Hardening and cold working    

    • B. 

      Normalizing         

    • C. 

      Martempering  

    • D. 

      Full annealing

  • 7. 
    During dielectric heating the heat is generated primarily due to _____________
    • A. 

      Due to molecular friction resulting from oscillating molecules and ions caused by the applied alternating electric field.

    • B. 

      Option 2

    • C. 

      Option 3

    • D. 

      Option 4

  • 8. 
    Carbon percentage in steel for carburizing is usually ______
    • A. 

      0.1-0.2%       

    • B. 

      0.2-0.35%        

    • C. 

      0.4-0.6%        

    • D. 

        0.7-0.9%

  • 9. 
    In which process steel is heated below the critical temperature___________
    • A. 

      Sub-critical annealing

    • B. 

      Full annealing

    • C. 

      Stress releiving

    • D. 

      Spherodizing annealing

  • 10. 
    Annealing improves_________
    • A. 

      Grain size

    • B. 

      Mechanical properties

    • C. 

      Electrical properties

    • D. 

      All of above

  • 11. 
    Austempering is the heat treatment process used to obtain greater________
    • A. 

      Hardness

    • B. 

      Toughness

    • C. 

      Brittleness

    • D. 

      Ductility

  • 12. 
    Spherodise annealing used to produce spheroidal or globular form of __________________ from plates of cementite in steel
    • A. 

      Carbide in ferrite

    • B. 

      Option 2

    • C. 

      Option 3

    • D. 

      Option 4

  • 13. 
    Which of the following hardening process is generally used for non-ferous materials?
    • A. 

      Cyaniding       

    • B. 

       Flame hardening

    • C. 

      Pack carburizing      

    • D. 

       Age hardening

  • 14. 
    Killed steel is___________
    • A. 

      Steel which has been shaped on a power hammer 

    • B. 

      Steel with less than normal percentage of carbon

    • C. 

      Steel that has lost its properties due to excessive alloying

    • D. 

      That steel which is deoxidised in the ladle with silicon and aluminium

  • 15. 
    The process of reheating the martenstic steel to reduce its brittleness without any significant loss in its hardness is ___________
    • A. 

      Normalizing

    • B. 

      Annealing

    • C. 

      Quenching

    • D. 

      Tempering

  • 16. 
    In stress relief annealing, steel is heated to a temperature between ______
    • A. 

       200⁰C to 250⁰C

    • B. 

       300⁰C to 325⁰C

    • C. 

      385⁰C to 440⁰C

    • D. 

      500⁰C to 550⁰C

  • 17. 
    Hardenability of a material can be measured using __________ test.
    • A. 

      Jominy end-quench            

    • B. 

      Charpy        

    • C. 

       Rockwell              

    • D. 

      Izod

  • 18. 
    In stress relief annealing, steel is heated to a temperature between ______
    • A. 

      200⁰C to 250⁰C

    • B. 

      300⁰C to 325⁰C

    • C. 

      385⁰C to 440⁰C

    • D. 

      500⁰C to 550⁰C

  • 19. 
    During dielectric heating the heat is generated primarily due to _____________
    • A. 

      Eddy currents

    • B. 

      Stray magnetic fields

    • C. 

      High voltage        

    • D. 

      High power consumption

  • 20. 
    Identify the type of furnace.
    • A. 

      Box type

    • B. 

      Muffle type

    • C. 

      Open hearth

    • D. 

      Blast type

  • 21. 
    Identify the type of furnace.
    • A. 

      Box type

    • B. 

      Muffle type

    • C. 

      Open hearth

    • D. 

      Blast type

  • 22. 
    Identify the type of heat treatment process
    • A. 

      Flame hardening  

    • B. 

      Induction hardening  

    • C. 

      Carburizing  

    • D. 

      Nitriding

  • 23. 
    Identify the type of heat treatment process
    • A. 

      Flame hardening  

    • B. 

      Induction hardening  

    • C. 

      Pack Carburizing  

    • D. 

      Nitriding

  • 24. 
    Identify the type of heat treatment process
    • A. 

      Flame hardening  

    • B. 

      Induction hardening  

    • C. 

      Pack Carburizing  

    • D. 

      Nitriding

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