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Mechanical Engineering :: Manufacturing and Production Technology

  1. The factor considered for evaluation of machinability is

  2. A.

     Cutting forces and power consumption

    B.

     Tool life

    C.

     Type of chips and shear angle

    D.

     All of these


  3. When the temperature of a solid metal increases,

  4. A.

     Strength of the metal decreases but ductility increases

    B.

     Both strength and ductility of the metal decreases

    C.

     Both strength and ductility of the metal increases

    D.

     Strength of the metal increases but ductility decreases


  5. In lapping operation, the amount of metal removed is

  6. A.

     0.005 to 0.01 mm

    B.

     0.01 to 0.1 mm

    C.

     0.05 to 0.1 mm

    D.

     0.5 to 1 mm


  7. In metal machining, the zone where the maximum heat is generated due to the plastic deformation of metal, is called

  8. A.

     Friction zone

    B.

     Work-tool contact zone

    C.

     Shear zone

    D.

     None of these


  9. Which of the following operations can be performed with milling cutters?

  10. A.

     Cutting key ways on shafts

    B.

     Cutting external screw threads

    C.

     Cutting teeth of spur gears

    D.

     All of these


  11. Volume of a cube of side ‘l’ and volume of a sphere of radius ‘r’ are equal. Both the cube and the sphere are solid and of same material. They are being cast. The ratio of the solidification time of the cube to the same of the sphere is

  12. A.

     (4π/6)³ × (r/l)⁶

    B.

     (4π/6) × (r/l)²

    C.

     (4π/6)² × (r/l)³

    D.

     (4π/6)² × (r/l)⁴


  13. The maximum production of small and slender parts is done by

  14. A.

     Watch maker's lathe

    B.

     Sliding head stock automatic lathe

    C.

     Multi-spindle automatic lathe

    D.

     Capstan lathe


  15. The method of centre less grinding used to produce taper is

  16. A.

     In-feed grinding

    B.

     Through feed grinding

    C.

     End feed grinding

    D.

     Any one of these


  17. In a milling operation, two side milling cutters are mounted with a desired distance between them so that both sides of a workpiece can be milled simultaneously. This set up is called

  18. A.

     Gang milling

    B.

     Straddle milling

    C.

     String milling

    D.

     Side milling


  19. A tool used to withdraw a drill from the sleeve is called

  20. A.

     Drill remover

    B.

     Drill puller

    C.

     Drift

    D.

     Drill drawer