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Mechanical Engineering :: Manufacturing and Production Technology

  1. Cold working of steel is defined as working

  2. A.

     At its recrystallisation temperature

    B.

     Above its recrystallisation temperature

    C.

     Below its recrystallisation temperature

    D.

     At two thirds of the melting temperature of the metal


  3. Hot rolling of mild steel is carried out

  4. A.

     At recrystallization temperature

    B.

     Between 100⁰C to 150⁰C

    C.

     Between recrystallization temperature

    D.

     Above recrystallization temperature


  5. In centerless grinders, the regulating wheel is inclined at

  6. A.

     0° to 8°

    B.

     9° to 15°

    C.

     16° to 20°

    D.

     21° to 25°


  7. If the flame of the welding torch is directed towards the progress of welding, then what will you call the welding technique?

  8. A.

     Forehand welding

    B.

     Flux cored ARC welding

    C.

     Electro slag welding

    D.

     Pulsed spray welding


  9. In DC arc welding, if leads are arranged in work as Negative pole of the welding arc and electrode as Positive pole of the welding arc, the arrangement is known as

  10. A.

     Fusion

    B.

     Reverse polarity

    C.

     Forward welding

    D.

     Direct polarity


  11. What is the welding defect caused due to improper control and poor removal of slog between passes called?

  12. A.

     Mismatch

    B.

     Under fill

    C.

     Crack

    D.

     Porosity


  13. Crater wear is mainly due to the phenomenon known as

  14. A.

     Adhesion of metals

    B.

     Oxidation of metals

    C.

     Diffusion of metals

    D.

     All of these


  15. The main purpose of spheroidising treatment is to improve

  16. A.

     Hardenability of low carbon steels

    B.

     Machinability of low carbon steels

    C.

     Hardenability of high carbon steels

    D.

     Machinability of high carbon steels


  17. Gear finishing operation is called

  18. A.

     Shaping

    B.

     Milling

    C.

     Hobbing

    D.

     Burnishing


  19. The chuck preferred for quick setting and accurate centering of a job is

  20. A.

     Four jaw independent chuck

    B.

     Collect chuck

    C.

     Three jaw universal chuck

    D.

     Magnetic chuck