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  • Question
  • 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

  • Correct Answer
  • supplies heat to reduce ore and melt the iron 


  • Engineering Materials problems


    Search Results


    • 1. Crystal structure of a material is, generally, examined by

    • Options
    • A. naked eye
    • B. optical microscope
    • C. metallurgical microscope
    • D. X-ray techniques
    • Discuss
    • 2. The number of slots in a 25 mm castle nut is

    • Options
    • A. 2
    • B. 4
    • C. 6
    • D. 8
    • Discuss
    • 3. 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
    • 4. 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
    • 5. For maximum power, the velocity of the belt will be

    • Options
    • A.
    • B.
    • C.
    • D. none of these
    • Discuss
    • 6. The quenching of steel from the upper critical point results in a fine grained structure.

    • Options
    • A. Agree
    • B. Disagree
    • Discuss
    • 7. 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
    • 8. Tungsten when added to steel __________ the critical temperature.

    • Options
    • A. does not effect
    • B. lowers
    • C. raises
    • Discuss
    • 9. The property of a material due to which it breaks with little permanent distortion, is called

    • Options
    • A. brittleness
    • B. ductility
    • C. malleability
    • D. plasticity
    • Discuss
    • 10. Free carbon in iron makes the metal

    • Options
    • A. soft and gives a coarse grained crystalline structure
    • B. soft and gives a fine grained crystalline structure
    • C. hard and gives a coarse grained crystalline structure
    • D. hard and gives a fine grained crystalline structure
    • Discuss


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