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Mechanical Engineering :: Manufacturing and Production Technology

  1. In order to have interference fit, it is essential that the lower limit of the shaft should be

  2. A.

     Greater than the upper limit of the hole

    B.

     Lesser than the upper limit of the hole

    C.

     Greater than the lower limit of the hole

    D.

     Lesser than the lower limit of the hole


  3. The common welding error that occurs due to wrong speed, faulty preparation, and high / low current, improper electrode size is called?

  4. A.

     Distortion

    B.

     Warping

    C.

     Porous weld

    D.

     Poor fusion


  5. The angle on which the strength of the tool depends is

  6. A.

     Rake angle

    B.

     Cutting angle

    C.

     Clearance angle

    D.

     Lip angle


  7. It is required to cut screw threads of 2 mm pitch on a lathe. The lead screw has a pitch of 6 mm. If the spindle speed is 60 r.p.m., then the speed of lead screw will be

  8. A.

     10 r.p.m.

    B.

     20 r.p.m.

    C.

     120 r.p.m.

    D.

     180 r.p.m.


  9. The tool made of cemented carbide wear out faster at

  10. A.

     Slow speeds

    B.

     Medium speeds

    C.

     Fast speeds

    D.

     Very fast speeds


  11. A set of eight form relieved milling cutters for each module is provided to enable cutting of gears of different

  12. A.

     Materials

    B.

     Types of gears

    C.

     Number of teeth

    D.

     Width of gears


  13. A grinding wheel is said to be of _________ if the abrasive grains can be easily dislodged.

  14. A.

     Soft grade

    B.

     Medium grade

    C.

     Hard grade

    D.

     None of these


  15. Dielectric is used in

  16. A.

     Electrochemical machining

    B.

     Ultrasonic machining

    C.

     Electro discharge machining

    D.

     Laser machining


  17. In electro-discharge machining, dielectric is used to

  18. A.

     Help in the movement of the sparks

    B.

     Control the spark discharges

    C.

     Act as coolant

    D.

     All of these


  19. The hard grade grinding wheels are denoted by the letters

  20. A.

     A to H

    B.

     I to P

    C.

     Q to Z

    D.

     A to P