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  • Question
  • Which of the following material has the maximum ductility?


  • Options
  • A. Mild steel
  • B. Copper
  • C. Zinc
  • D. Aluminium

  • Correct Answer
  • Mild steel 


  • Machine Design problems


    Search Results


    • 1. In a flange coupling, the flanges are coupled together by means of

    • Options
    • A. bolts and nuts
    • B. studs
    • C. headless taper bolts
    • D. none of these
    • Discuss
    • 2. The toughness of a material __________ when it is heated.

    • Options
    • A. increases
    • B. decreases
    • C. does not change
    • Discuss
    • 3. The centre distance between two meshing involute gears is equal to

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 4. The ball bearings are provided with a cage

    • Options
    • A. to reduce friction
    • B. to facilitate slipping of balls
    • C. to prevent the lubricant from flowing out
    • D. to maintain the balls at a fixed distance apart
    • Discuss
    • 5. Which of the following statement is wrong?

    • Options
    • A. The power transmitted by V-belts is less than flat belts for the same coefficient of friction, arc of contact and allowable tension in the belts
    • B. The V-belt drive is used with large centre distance
    • C. The V-belt may be operated in either direction with tight side of the belt at the top or bottom
    • D. The ratio of driving tensions in V-belt drive is more than flat belt drives
    • Discuss
    • 6. According to Unwin's formula, the relation between the diameter of rivet hole (d) and the thickness of plate (t) is given by (where d and t are in mm)

    • Options
    • A. d = t
    • B. d = 1.6 t
    • C. d = 2 t
    • D. d = 6 t
    • Discuss
    • 7. The application of third type levers is found in

    • Options
    • A. handle of a hand pump
    • B. hand wheel of a punching press
    • C. lever of a loaded safety valve
    • D. a pair of tongs
    • Discuss
    • 8. Two shafts A and B under pure torsion are of identical length and identical weight and are made of the same material. The shaft A is solid and the shaft B is hollow. We can say that

    • Options
    • A. shaft B is better than shaft A
    • B. shaft A is better than shaft B
    • C. both the shafts are equally good
    • Discuss
    • 9. The constant factor in case of R10 series of preferred numbers is

    • Options
    • A. 1.06
    • B. 1.12
    • C. 1.26
    • D. 1.58
    • Discuss
    • 10. The sleeve or muff coupling is designed as a

    • Options
    • A. dun cylinder
    • B. thick cylinder
    • C. solid shaft
    • D. hollow shaft
    • Discuss


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