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    Engineering Materials Objective Questions with Answers - Set 23

    Practice Test: Question Set - 23


    1. Acidic solution is one which has pH value
      (A) Greater than 7
      (B) Less than 7
      (C) Equal to 7
      (D) pH value has nothing to do with neutral solution

    2. Basic solution is one which has pH value
      (A) Greater than 7
      (B) Equal to 7
      (C) Less than 7
      (D) pH value has nothing to do with basic solution

    3. Pearlite is a combination of
      (A) Ferrite and cementite
      (B) Cementite and gamma iron
      (C) Ferrite and austenite
      (D) Ferrite and iron graphite

    4. Austenite is a combination of
      (A) Ferrite and cementite
      (B) Cementite and gamma iron
      (C) Ferrite and austenite
      (D) Ferrite and iron graphite

    5. Specify the sequence correctly
      (A) Grain growth, recrystallization, stress relief
      (B) Stress relief, grain growth, recrystallization
      (C) Stress relief, recrystallization, grain growth
      (D) Grain growth, stress relief, recrystallization

    6. The transistor is made of
      (A) Silver
      (B) Gold
      (C) Copper
      (D) Germanium

    7. Thermoplastic materials are those materials which
      (A) Are formed into shape under heat and pressure and results in a permanently hard product
      (B) Do not become hard with the application of heat and pressure and no chemical change occurs
      (C) Are flexible and can withstand considerable wear under suitable conditions
      (D) Are used as a friction lining for clutches and brakes

    8. The percentage of carbon in cast iron varies from
      (A) 0.1 to 0.5
      (B) 0.5 to 1
      (C) 1 to 1.7
      (D) 1.7 to 4.5

    9. The hardness and tensile strength in austenitic stainless steel can be increased by
      (A) Hardening and cold working
      (B) Normalizing
      (C) Martempering
      (D) Full annealing

    10. An alloy steel which is work hardenable and which is used to make the blades of bulldozers, bucket wheel excavators and other earth moving equipment contain iron, carbon and
      (A) Chromium
      (B) Silicon
      (C) Manganese
      (D) Magnesium

    11. Beryllium bronze contains
      (A) 60% copper and 40% beryllium
      (B) 80% copper and 20% beryllium
      (C) 97.75% copper and 2.25% beryllium
      (D) 99% copper and 1% beryllium

    12. Cast iron is manufactured in
      (A) Blast furnace
      (B) Cupola
      (C) Open hearth furnace
      (D) Bessemer converter

    13. The lower critical point for all steels is
      (A) 600°C
      (B) 700°C
      (C) 723°C
      (D) 913°C

    14. The hardness of steel increases if it contains
      (A) Pearlite
      (B) Ferrite
      (C) Cementite
      (D) Martensite

    15. The cupola is used to manufacture
      (A) Pig iron
      (B) Cast iron
      (C) Wrought iron
      (D) Steel

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    Item Reviewed: Engineering Materials Objective Questions with Answers - Set 23 Rating: 5 Reviewed By: Pranab Debnath
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