Engineering Materials MCQs with answers Page - 3

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Q. Which of the following is a composite material?

  • (A) Y-alloy
  • (B) High speed steel
  • (C) Tungsten carbide
  • (D) Fibre reinforced plastic

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Q. A material which undergoes no deformation till its yield point is reached and then it flows at a constant stress is known as

  • (A) Rigid plastic
  • (B) Elastic
  • (C) Rigid
  • (D) Plastic

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Q. In carbon steel castings

  • (A) The percentage of carbon is less than 1.7%
  • (B) The percentage of carbon is between 1.7% to 2%
  • (C) The percentage for alloying elements is controlled
  • (D) (A) and (C) above

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Q. Nickel is used in

  • (A) cutting tools
  • (B) automatic voltage regulators
  • (C) electrodes of thermionic valves
  • (D) pressure sensitive elements

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Q. In order to improve machinability of steels, the treatment generally done is

  • (A) Cyniding
  • (B) Tempering
  • (C) Spheroidising
  • (D) Annealing

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Q. Induction hardening is the process of

  • (A) Electrical hardening process
  • (B) Hardening surface for wear resistance
  • (C) Hardening the core
  • (D) Selective hardening

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Q. "Troosite" is obtained when

  • (A) Quenching steel during transformation
  • (B) A fully hardened steel is finally drawn at about 677?C
  • (C) Steel is rapidly quenched in oil
  • (D) When alloy steels are rapidly quenched in water

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Q. Cast iron containing 6.6% carbon is

  • (A) Black in colour containing only pearlite
  • (B) Black in colour containing only ferrite
  • (C) Gray in colour containing pearite and ferrite only
  • (D) Whitish containing cementite only

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Q. The main alloy for corrosion resistance in stainless steel is

  • (A) Manganese
  • (B) Carbon
  • (C) Vanadium
  • (D) Chromium

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Q. A steel having ferrite and pearite is

  • (A) Soft
  • (B) Hard
  • (C) Ductile
  • (D) (A) and (B) above

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