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  • Question
  • 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

  • Correct Answer
  • to maintain the balls at a fixed distance apart 


  • Machine Design problems


    Search Results


    • 1. 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
    • 2. A crankshaft is a __________ shaft.

    • Options
    • A. transmission
    • B. machine
    • Discuss
    • 3. The load cup of a screw jack is made separate from the head of the spindle to

    • Options
    • A. enhance the load carrying capacity of the jack
    • B. reduce the effort needed for lifting the working load
    • C. prevent the rotation of load being lifted
    • D. reduce the value of frictional torque
    • Discuss
    • 4. Surface endurance limit of gear material is dependent upon its

    • Options
    • A. elastic strength
    • B. yield strength
    • C. brinell hardness number
    • D. toughness
    • Discuss
    • 5. Circumferential joint in boilers is used to get the required length of a boiler.

    • Options
    • A. True
    • B. False
    • Discuss
    • 6. The centre distance between two meshing involute gears is equal to

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 7. The toughness of a material __________ when it is heated.

    • Options
    • A. increases
    • B. decreases
    • C. does not change
    • Discuss
    • 8. 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
    • 9. Which of the following material has the maximum ductility?

    • Options
    • A. Mild steel
    • B. Copper
    • C. Zinc
    • D. Aluminium
    • Discuss
    • 10. 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


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