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


  • Options
  • A. 2
  • B. 4
  • C. 6
  • D. 8

  • Correct Answer


  • Tags: Bank Exams

    Machine Design problems


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    • 1. A sliding bearing in which the working surfaces are completely separated from each other by lubricant is called zero film bearing.

    • Options
    • A. True
    • B. False
    • Discuss
    • 2. When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as

    • Options
    • A. angular bevel gears
    • B. crown bevel gears
    • C. internal bevel gears
    • D. mitre gears
    • Discuss
    • 3. For maximum power, the velocity of the belt will be

    • Options
    • A.
    • B.
    • C.
    • D. none of these
    • Discuss
    • 4. The number of rivets in shear shall be equal to the number of rivets in crushing.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss
    • 5. A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called

    • Options
    • A. castle nut
    • B. jam nut
    • C. ring nut
    • D. sawn nut
    • Discuss
    • 6. Crystal structure of a material is, generally, examined by

    • Options
    • A. naked eye
    • B. optical microscope
    • C. metallurgical microscope
    • D. X-ray techniques
    • Discuss
    • 7. The coke in the charge of blast furnace

    • Options
    • A. controls the grade of pig iron
    • B. acts as an iron-bearing mineral
    • C. supplies heat to reduce ore and melt the iron
    • D. forms a slag by combining with impurities
    • Discuss
    • 8. The quenching of steel from the upper critical point results in a fine grained structure.

    • Options
    • A. Agree
    • B. Disagree
    • Discuss
    • 9. Closed packed hexagonal space lattice is found in

    • Options
    • A. zinc, magnesium, cobalt, cadmium, antimony and bismuth
    • B. gamma-iron, aluminium, copper, lead, silver and nickel
    • C. alpha-iron, tungsten, chromium and molybdenum
    • D. none of the above
    • Discuss
    • 10. Tungsten when added to steel __________ the critical temperature.

    • Options
    • A. does not effect
    • B. lowers
    • C. raises
    • Discuss


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