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Mechanical Engineering :: Manufacturing and Production Technology

  1. Which type of motor is not used in axis or spindle drives of CNC machine tools?

  2. A.

     Induction motor

    B.

     DC servo motor

    C.

     Stepper motor

    D.

     Linear servo motor


  3. In a metal arc welding process, a gas metal arc welding with magnetized flux is used and can be done in all the positions i.e. flat position, vertical position or inclined position.

  4. A.

     Globular transfer

    B.

     Spray transfer

    C.

     GMAW practice

    D.

     Dip transfer


  5. The maximum possible draft in cold rolling of sheet increases with the

  6. A.

     Increase in coefficient of friction

    B.

     Decrease in coefficient of friction

    C.

     Decrease in roll radius

    D.

     Decrease in roll velocity


  7. Allowance in limits and fits refers to

  8. A.

     Maximum clearance between shaft and hole

    B.

     Minimum clearance between shaft and hole

    C.

     Difference between maximum and minimum sizes of hole

    D.

     Difference between maximum and minimum sizes of shaft


  9. The purpose of jigs and fixtures is to

  10. A.

     Increase machining accuracy

    B.

     Facilitate interchangeability

    C.

     Decrease expenditure on quality control

    D.

     All of these


  11. Which of the following process is used for preparing parts having large curved surfaces and thin sections?

  12. A.

     Hot machining

    B.

     Ultrasonic machining

    C.

     ECM process

    D.

     Chemical milling


  13. The work or surface speed for cylindrical grinding varies from

  14. A.

     5 to 10 m/min

    B.

     10 to 20 m/min

    C.

     20 to 30 m/min

    D.

     40 to 60 m/min


  15. The operation of machining several surfaces of a workpiece simultaneously is called

  16. A.

     Profile milling

    B.

     Gang milling

    C.

     Saw milling

    D.

     Helical milling


  17. Two plates of the same metal having equal thickness are to be butt welded with electric arc. When the plate thickness changes, welding is achieved by

  18. A.

     Adjusting the current

    B.

     Adjusting the duration of current

    C.

     Changing the electrode size

    D.

     Changing the electrode coating


  19. Down milling is also called

  20. A.

     Conventional milling

    B.

     Climb milling

    C.

     End milling

    D.

     Face milling