I.O.F. Chargemen Mechanical Online Mega Test

100 Questions | Total Attempts: 233

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Mechanical Engineering Quizzes & Trivia

Questions and Answers
  • 1. 
    Which one of the following materials is used as the bonding material for grinding wheels
    • A. 

      Silicon carbide

    • B. 

      Sodium silicate

    • C. 

      Boron carbide

    • D. 

      Aluminium oxide

  • 2. 
    In reaming process
    • A. 

      The metal removal rate is high

    • B. 

      High surface finish is obtained

    • C. 

      High form of accuracy is obtained

    • D. 

      High degree of tolerance achieved

  • 3. 
    In the griding wheel have specification A60G7B23, B stands for the
    • A. 

      Resinoid bond

    • B. 

      Rubber bond

    • C. 

      Shellac bond

    • D. 

      Silicate bond

  • 4. 
    Wheel loading in grinding is defined as
    • A. 

      Types of wheel bond fracture

    • B. 

      Types of wheel grain fracture

    • C. 

      Sticking of small particle on grinding wheel

    • D. 

      None of the above

  • 5. 
    Helix angle of a fast helix drill is normally
    • A. 

      35

    • B. 

      60

    • C. 

      90

    • D. 

      5

  • 6. 
    A milling cutter having 8 teeth is rotating at 150 rpm. if the feed per tooth is 0.1 mm, the value of thew table speed in mm/min is
    • A. 

      120

    • B. 

      187

    • C. 

      125

    • D. 

      70

  • 7. 
    In turning of slender rods, it is necessory to keep the transverse force minimium mainly to
    • A. 

      Improve the surface finish

    • B. 

      Increase productivity

    • C. 

      Improve cutting efficiency

    • D. 

      Reduce vibrations and chatter

  • 8. 
    Among the conventional, machining process maximium specifiec energy is consumed in
    • A. 

      Grinding

    • B. 

      Drilling

    • C. 

      Planing

    • D. 

      Turnig

  • 9. 
    Which of the following is true regarding milling machine
    • A. 

      Up (climb) milling provides better surface finish while down milling provide longer tool life

    • B. 

      Up milling provides longer tool life while down milling provide better surface finish

    • C. 

      Up milling is provide both better tool life as well as better surface finish

    • D. 

      Down milling provide better surface finish as well as longer tool life

  • 10. 
    Which of the following is hardest materials next to diamond
    • A. 

      Aluminium oxide

    • B. 

      Silicon carbide

    • C. 

      Cubic boron nitride

    • D. 

      Cemented carbide

  • 11. 
    Consider the following statements regarding NC machine tools
    • A. 

      They reduce non productive time

    • B. 

      They reduce fixturing

    • C. 

      Niether 1 nor 2

    • D. 

      Both 1 and 2

  • 12. 
    The bottles from thermo plastic materials are made by
    • A. 

      Compression moulding

    • B. 

      Extrusion with mandrel

    • C. 

      Injection moulding

    • D. 

      blow moulding

  • 13. 
    The process of producing components in moulds without the application of pressure, is known as
    • A. 

      Moulding

    • B. 

      Laminating

    • C. 

      Casting

    • D. 

      Calendering

  • 14. 
    Which of the following materials used for car tyres as a standard material
    • A. 

      Styrene butadiene rubber

    • B. 

      Butyl rubber

    • C. 

      Nitrile rubber

    • D. 

      Any one of the above

  • 15. 
    In powder metallurgy, the operation carried out to improve the bearing property of a bush is called
    • A. 

      Infilteration

    • B. 

      Impregnation

    • C. 

      Plating

    • D. 

      Sintering

  • 16. 
    Deep hole drilling of small diameter say 0.2 mm is done with EDM by selecting the tool material as
    • A. 

      Copper wire

    • B. 

      Graphite

    • C. 

      Brass wire

    • D. 

      Tungston wire

  • 17. 
    Which one of the followng principle responcible for metal removal rate in ultra sonic machining
    • A. 

      Plastic shear

    • B. 

      Melting and vapourization

    • C. 

      Erosion and brittle fracture

    • D. 

      Corrosive reaction

  • 18. 
    Cold shortness is defined as the
    • A. 

      Fracture in room temperature below their recrystallization temperature

    • B. 

      Brittelness in room temperature below their recrystallization temperature

    • C. 

      Loss of ductility above recrystallization temperature

    • D. 

      Decrease of brittleness in room temperature

  • 19. 
    The compositions of some of the alloy steels are as under
    • A. 

      18 W 4 Cr 1 V

    • B. 

      12 Mo 1 W 4 Cr 1 V

    • C. 

      6 Mo 6 W 4 Cr 1 V

    • D. 

      18 W 8 Cr 1 V

  • 20. 
    The straigh grades of cemented carbide cutting tool materials contain
    • A. 

      Tunsten Carbide only

    • B. 

      Tungsten carbide and titanium carbide

    • C. 

      Tungsten carbide and cobalt

    • D. 

      Tungsten carbide and cobalt carbide

  • 21. 
    In a mechanical shaper the length of stroke is increased by
    • A. 

      increasing the centre distance of bull gear and crank pin

    • B. 

      Decreasing the centre distance of bull gear and crank pin

    • C. 

      Increasing the length of arm

    • D. 

      Decreasing the length of slot in the slotted lever

  • 22. 
    A Grinding wheel of 150mm diameter is rotating at 3000 rpm. The grinding speed is
    • A. 

      7.5 π m/s

    • B. 

      15π m/s

    • C. 

      45π m/s

    • D. 

      450π m/s

  • 23. 
    Trepanning is performed for
    • A. 

      Finishing a drilled hole

    • B. 

      Producing a Large hole without drilling

    • C. 

      Truing a hole for Alignment

    • D. 

      Enlarging a Drilled hole

  • 24. 
    A Lead Screw with half nuts in a lathe, Free to Rotate in both Direction has
    • A. 

      V-threads

    • B. 

      Whithworth threads

    • C. 

      Buttress threads

    • D. 

      ACME threads

  • 25. 
    A Dynameter is a device used for the measurement of
    • A. 

      Chip thickness ratio

    • B. 

      Forces during metal cutting

    • C. 

      Wear of the cutting tool

    • D. 

      Deflection of cutting tool