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Mechanical Engineering :: Workshop Technology

  1. The process used to improve fatigue resistance of the metal by setting up compressive stresses in its surface, is known as

  2. A.
    hot piercing
    B.
    extrusion
    C.
    cold peening
    D.
    cold heading

  3. Fin is a casting defect which is due to thin projections of metal not intended as a part of casting.

  4. A.
    Correct
    B.
    Incorrect

  5. The process of increasing the cross-section of a bar at the expense of its length, is called

  6. A.
    drawing down
    B.
    upsetting
    C.
    spinning
    D.
    peening

  7. In TIG arc welding, the welding zone is shielded by an atmosphere of

  8. A.
    helium gas
    B.
    argon gas
    C.
    either (a) or (b)
    D.
    none of these

  9. The metal extrusion process is generally used for producing

  10. A.
    uniform solid sections
    B.
    uniform hollow sections
    C.
    uniform solid and hollow sections
    D.
    varying solid and hollow sections

  11. The operation of giving impressions of figures, letters or designs on sheet metal parts, is known as embossing.

  12. A.
    Correct
    B.
    Incorrect

  13. In a gas welding of mild steel using an oxy-acetylene flame, the total amount of acetylene consumed is 10 litre. The oxygen consumption from the cylinder is

  14. A.
    5 litre
    B.
    10 litre
    C.
    15 litre
    D.
    20 litre

  15. The sand used for making cores is

  16. A.
    green sand
    B.
    dry sand
    C.
    loam sand
    D.
    oil sand

  17. Sand wash is a casting defect which

  18. A.
    results in a mismatching of the top and bottom parts of a casting
    B.
    results in general enlargement of the casting
    C.
    occurs near the ingates as rough lumps on the surface of a casting
    D.
    occurs as sand patches on the upper surface of a casting

  19. Cold working distorts grain structure and does not provide an appreciable reduction in size.

  20. A.
    Correct
    B.
    Incorrect