Engineering Materials MCQs with answers Page - 7

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Q. The effect f rolling on steel is

  • (A) To elongate the inclusions in the direction of rolling giving the steel excellent properties
  • (B) Reduction in tensile strength
  • (C) Reduction in fatigue strength
  • (D) Reduction in hardness

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Q. Fatigue failure occurs when a part is subjected to

  • (A) Tensile stress
  • (B) Compressive stress
  • (C) Torsion
  • (D) Fluctuating stress

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Q. Heavy water is used in atomic power plants as

  • (A) Source of energy
  • (B) Moderator
  • (C) Lubricant
  • (D) Fuel

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Q. The surface hardness that can be obtained by nitriding is generally in the range

  • (A) 600 to 800 VPN
  • (B) Strength and hardness of steel is increased
  • (C) 400 to 600 VPN
  • (D) 1000 to 1100 VPN

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Q. Residual magnetism is

  • (A) Magnetism left in a sample after a decade
  • (B) Magnetism left in a sample after one year
  • (C) Flux density present in a material after magnetising force is removed
  • (D) The magnetic force required to fully demagnetise a sample

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Q. In cast irons

  • (A) Impact strength is high
  • (B) With static loading the strength in tension is higher than that in compression
  • (C) With static loading the strength in tension is lower than that in compression
  • (D) (A) and (B) above

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Q. When the atomic magnetic moments are randomly oriented in a solid, its magnetic behaviour is termed as

  • (A) polycrystalline
  • (B) anti-ferromagnetic
  • (C) paramagnetic
  • (D) semi-magnetic

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Q. Plastic are

  • (A) Good conductors of heat and bad conductors of electricity
  • (B) Good conductors of heat as well as electricity
  • (C) Bad conductors of heat and good conductors of electricity
  • (D) Bad conductors of heat as well as electricity

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Q. Which of the following does not contain copper as one of the alloying elements?

  • (A) Monel metal
  • (B) Perminivar
  • (C) Nichrome
  • (D) Manganin

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Q. When the metals are severely deformed in a particular direction, as in rolling or forging (on a macro scale), the mechanical properties may be

  • (A) Anisotropic
  • (B) Identical
  • (C) Isotropic
  • (D) Uniform

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