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    Engineering Materials Objective Questions with Answers - Set 22

    Practice Test: Question Set - 22


    1. The alloy used for making electrical resistances and heating elements is
      (A) Nichrome
      (B) Invar
      (C) Magnin
      (D) Elinvar

    2. Permalloy is a
      (A) Kind of stainless steel
      (B) None ferrous alloy
      (C) Polymer
      (D) Nickel and iron alloy having high permeability

    3. Phosphor bronze contains
      (A) 0.5% of phosphorous
      (B) 1% phosphorous
      (C) 2.5% phosphorous
      (D) None of the above

    4. Free cutting steels
      (A) Are used where ease in machining is the criterion
      (B) Contain carbon in free form
      (C) Require least cutting force
      (D) Do not exist

    5. Delta metal is an alloy of
      (A) Copper, zinc and iron
      (B) Iron, nickel and copper
      (C) Iron, lead and tin
      (D) Iron, aluminium and magnesium

    6. Addition of copper to aluminium results in
      (A) Improvement of casting characteristics
      (B) Improvement of corrosion resistance
      (C) One of the best known age and precipitation hardening systems
      (D) Improving machinability

    7. Addition of lead and bismuth to aluminium results in
      (A) Improvement of casting characteristics
      (B) Improvement of corrosion resistance
      (C) One of the best known age and precipitation hardening systems
      (D) Improving machinability

    8. Cast iron is a
      (A) Ductile material
      (B) Malleable material
      (C) Brittle material
      (D) Tough material

    9. Addition of silicon to aluminium results in
      (A) Improvement of casting characteristics
      (B) Improvement of corrosion resistance
      (C) One of the best known age and precipitation hardening systems
      (D) Improving machinability

    10. White metal contains
      (A) 63 to 67% nickel and 30% copper
      (B) 88% copper and 10% tin and rest zinc
      (C) Alloy of tin, lead and cadmium
      (D) Silver and chromium

    11. German silver contains
      (A) 1% silver
      (B) 2.5% silver
      (C) 5% silver
      (D) 10% silver

    12. Smelting is the process of
      (A) Removing the impurities like clay, sand etc. from the iron ore by washing with water
      (B) Expelling moisture, carbon dioxide, sulphur and arsenic from the iron ore by heating in shallow kilns
      (C) Reducing the ore with carbon in the presence of a flux
      (D) All of the above

    13. Babbitt metal is a
      (A) Lead base alloy
      (B) Tin base alloy
      (C) Copper base alloy
      (D) Both (A) and (C) above

    14. Duralumin contains
      (A) 94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
      (B) 92.5% aluminium, 40% copper, 2% nickel, and 1.5% Mg
      (C) 10% aluminium and 90% copper
      (D) 90% magnesium and 9% aluminium with some copper

    15. Which of the following material has maximum ductility?
      (A) Mild steel
      (B) Copper
      (C) Nickel
      (D) Aluminium

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    Item Reviewed: Engineering Materials Objective Questions with Answers - Set 22 Rating: 5 Reviewed By: Pranab Debnath
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