Materials and Construction MCQs with answers Page - 1

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Q. Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (l/20th of ordinary metals)?

  • (A) Alumel
  • (B) Chromel
  • (C) Constantan
  • (D) Invar

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Q. In drop forging process, the forging is done by dropping the __________ at high velocity.

  • (A) Hammer
  • (B) Workpiece
  • (C) Die with hammer
  • (D) Weight on hammer

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Q. Most of the common metals have __________ crystal structure.

  • (A) Cubic
  • (B) Hexagonal
  • (C) Orthorhombic
  • (D) None of these

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Q. Chrome vanadium steels usually contain 0.8 to 1.1% Cr, 0.25 to 0.35% C and < 0.25% V. It is

  • (A) Used for making axle & shafts of aeroplanes, automobiles and locomotives
  • (B) Having poor fatigue resistance
  • (C) Having poor toughness
  • (D) Not helpful in producing cleaner steel due to oxidising action of vanadium

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Q. Liners of a ball mill are never made of

  • (A) Alloy steel
  • (B) Lead
  • (C) Cast iron
  • (D) Rubber or ceramic material

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Q. Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines?

  • (A) Silicon steel
  • (B) Chromium steel
  • (C) Molybdenum steel
  • (D) None of these

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Q. Steel tower used for the storage of oleum

  • (A) Is lined with lead
  • (B) Need not be lined
  • (C) Is lined with rubber
  • (D) Is lined with acid-proof bricks

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Q. Iron alloyed with carbon upto 2% is called

  • (A) Pig iron
  • (B) Wrought iron
  • (C) High carbon steel
  • (D) None of these

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Q. A suitable material of construction to use with fuming sulphuric acid is

  • (A) Carbon steel
  • (B) Stainless steel type 304
  • (C) Nickel
  • (D) Monel

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Q. Gas holder of a gobar (cowdung) gas plant is made of

  • (A) Aluminium
  • (B) Mild steel
  • (C) Tin
  • (D) Molybdenum stainless steel

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