Materials and Construction MCQs with answers Page - 17

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Q. Pick out the wrong statement

  • (A) Hardening makes the steel more brittle
  • (B) High alloy steels contain more than 50% alloying element
  • (C) 18/8 stainless steel is a magnetic steel
  • (D) Both B and C

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Q. A material capable of undergoing large permanent deformation, when subjected to tension is termed as

  • (A) Friable
  • (B) Ductile
  • (C) Brittle
  • (D) None of these

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Q. Which one occupies the lowermost position in the electromotive series of metals?

  • (A) Aluminium
  • (B) Noble metals (Ag, Pt, Au)
  • (C) Zinc
  • (D) Alkali metals (K, Na, Li)

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Q. Carbon is present in the uncombined (graphitic) form in case of

  • (A) Cast iron
  • (B) Steel
  • (C) Ferroalloy
  • (D) None of these

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Q. Constantan is an alloy of

  • (A) Cu (55%) & Sn (45%)
  • (B) Cu (55%) & Ni (45%)
  • (C) Pt (95%) & Rh (10%)
  • (D) Fe (80%) & Ni (20%)

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Q. Constituents of stellite are

  • (A) Zinc, copper and nickel
  • (B) Cobalt, chromium and tungsten
  • (C) Zinc, aluminium and nickel
  • (D) Nickel, cobalt and vanadium

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Q. Polythene (low or high density) containers are not corroded by

  • (A) Sulphuric acid (10%) at room temperature
  • (B) Nitric acid (95%) at room temperature
  • (C) Sulphur trioxide at 60°C
  • (D) Any of these

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Q. An alloy of iron containing 4% carbon is called

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

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Q. German silver used for decorative purposes contains maximum percentage of

  • (A) Silver
  • (B) Copper
  • (C) Zinc
  • (D) Nickel

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Q. Carbon percentage is the same in cast iron and

  • (A) Wrought iron
  • (B) Pig iron
  • (C) Mild steel
  • (D) High silicon (14%) iron

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