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Engineering Materials problems


  • 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 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
  • 3. The quenching of steel from the upper critical point results in a fine grained structure.

  • Options
  • A. Agree
  • B. Disagree
  • Discuss
  • 4. 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
  • 5. Tungsten when added to steel __________ the critical temperature.

  • Options
  • A. does not effect
  • B. lowers
  • C. raises
  • Discuss
  • 6. 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
  • 7. 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
  • 8. Thermoplastic materials are those materials which

  • Options
  • A. are formed into shape under heat and pressure and results in a permanently hard product
  • B. do not become hard with the application of heat and pressure and no chemical change occurs
  • C. are flexible and can withstand considerable wear under suitable conditions
  • D. are used as a friction lining for clutches and brakes
  • Discuss
  • 9. Which of the following has a fine gold colour and is used for imitation jewellery?

  • Options
  • A. Silicon bronze
  • B. Aluminium bronze
  • C. Gun metal
  • D. Babbit metal
  • Discuss
  • 10. The hardness and tensile strength in austenitic stainless steel can be increased by

  • Options
  • A. hardening and cold working
  • B. normalising
  • C. martempering
  • D. full annealing
  • Discuss

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