Quiz  /  Machine Drawing Gate & PSU MCQ Questions With Answers

  • 1. 
    Guest's theory is used for....

  • Brittle materials
  • Ductile materials
  • Elastic materials
  • Plastic materials

  • 2. 
    The number of slots in a 25mm castle nut is

  • 6
  • 8
  • 4
  • 2

  • 3. 
    The notch sensitivity q is expressed in terms of fatigue stress concentration factor 'Kf' and theoretical stress concentration factor 'Kt' as ...

  • (Kf + 1) / (Kt + 1)
  • (Kf - 1) / (Kt - 1)
  • (Kt + 1) / (Kf + 1)
  • (Kt - 1) / (Kf - 1)

  • 4. 
    In the levers of third type, the mechanical advantage is ________ one.

  • Equal to
  • More than
  • Less than
  • None of these

  • 5. 
    In Vickers hardness testing, the pyramid indentor apex is...

  • 40*
  • 122*
  • 136*
  • 152*

  • 6. 
    Flywheels are used in punching and shear operation.

  • False
  • True

  • 7. 
    If the centre distance of the mating gears having involute teeth is varied limits the velocity ratio...

  • Increases
  • Decreases
  • Remains unchanged
  • None of these

  • 8. 
    Rankine Gordon formula for buckling is valid for...

  • Short and long column
  • Long column
  • Short column
  • very long column

  • 9. 
    In nitrated parts, the origins of the fatigue cracks will occur at..

  • Surface
  • Just below the surface
  • Within the core
  • None of the above

  • 10. 
    A screw will be self locking, if....

  • Friction angle is less than helix angle
  • Friction angle is more than helix angle
  • Friction angle is equal to helix angle
  • Efficiency of screw is 100%

  • 11. 
    A column of length L is fixed at both ends. The equivalent length of the column is....

  • L
  • L/3
  • L/2
  • 3L

  • 12. 
    Surface endurance limit of gear material is dependent upon its...

  • Elastic strength
  • Yield strength
  • Toughness
  • Brinell hardness number

  • 13. 
    The size of a gear is usually specified by...

  • Pressure angle
  • Pitch circle diameter
  • circular pitch
  • Diametral pitch

  • 14. 
    The steel widely used for motor car crankshafts is.....

  • Nickel steel
  • High speed steel
  • Nickel chrome steel
  • Chrome steel

  • 15. 
    The helix angle for double helical gears may be made up to...........

  • 75*
  • 60*
  • 45*
  • 90*
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