Home / Mechanical Engineering / Workshop Technology :: section-8

Mechanical Engineering :: Workshop Technology

  1. Aluminium is the best material for making patterns because it is

  2. A.

     Light in weight

    B.

     Easy to work

    C.

     Corrosion resistant

    D.

     All of these


  3. In submerged arc welding, an arc is produced between a

  4. A.

     Carbon electrode and the work

    B.

     Metal electrode and the work

    C.

     Bare metal electrode and the work

    D.

     Two tungsten electrodes and the work


  5. Rotary swaging

  6. A.

     Is extensively used for making bolts and rivets

    B.

     Is used for reducing the diameters of round bars and a tube by rotating dies which open and close rapidly on the work

    C.

     Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface

    D.

     Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part


  7. When a pattern is made in three parts, the top part, is known as a

  8. A.

     Drag

    B.

     Cheek

    C.

     Cope

    D.

     None of these


  9. An oxidising process used for aluminium and magnesium articles is called

  10. A.

     Galvanizing

    B.

     Anodizing

    C.

     Parkerising

    D.

     Sherardizing


  11. Cast iron and steel pipes are produced by

  12. A.

     Slush casting

    B.

     Investment casting

    C.

     True centrifugal casting

    D.

     Die casting


  13. Which of the following methods can be used for manufacturing 2 meter long seamless metallic tubes?

  14. A.

     Drawing

    B.

     Extrusion

    C.

     Rolling

    D.

     Extrusion and rolling


  15. In arc welding, the temperature of heat produced by the electric arc is of the order of

  16. A.

     3000°C to 4000°C

    B.

     4000°C to 5000°C

    C.

     5000°C to 6000°C

    D.

     6000°C to 7000°C


  17. The adhesiveness is the property of sand due to which

  18. A.

     It evolves a great amount of steam and other gases

    B.

     The sand grains stick together

    C.

     It clings to the sides of a moulding box

    D.

     None of these


  19. Seam welding is a

  20. A.

     Continuous spot welding process

    B.

     Multi-spot welding process

    C.

     Arc welding process

    D.

     Process used for joining round bars