Engineering Materials Objective Questions with Answers - Set 21

Practice Test: Question Set - 21


1. Cupola produces following material
    (A) Cast iron
    (B) Pig iron
    (C) Wrought iron
    (D) Malleable iron

2. Beryllium bronze has
    (A) High yield point
    (B) High fatigue limit
    (C) Both (A) and (B)
    (D) None of these

3. The machinability of steel is increased by
    (A) Silicon and sulphur
    (B) Phosphorous, lead and sulphur
    (C) Sulphur, graphite and aluminium
    (D) Phosphorous and aluminium

4. Cold rolled steel sheets contain carbon of the following order
    (A) 0.1%
    (B) 0.2%
    (C) 0.4%
    (D) 0.6%

5. Drop forging dies contain carbon of the order of
    (A) 0.1 to 0.2%
    (B) 0.25 to 0.5%
    (C) 0.6 to 0.7%
    (D) 0.7 to 0.9%

6. The alloying element which reduces the formation of iron sulphide in steel is
    (A) Chromium
    (B) Nickel
    (C) Vanadium
    (D) Manganese

7. Preheating is essential in welding
    (A) Cast iron
    (B) High speed steel
    (C) All nonferrous materials
    (D) All of the above

8. Steel made from phosphate iron is
    (A) Brittle
    (B) Hard
    (C) Ductile
    (D) Tough

9. The crystal structure of brass is
    (A) F.C.C.
    (B) B.C.C.
    (C) H.C.P.
    (D) Orthorhombic crystalline structure

10. Corrosion resistance of steel is increased by adding
    (A) Chromium and nickel
    (B) Nickel and molybdenum
    (C) Aluminium and zinc
    (D) Tungsten and sulphur

11. Which of the following is used for bearing liner?
    (A) Gun metal
    (B) Bronze
    (C) Bell metal
    (D) Babbitt metal

12. Aluminium bronze contains aluminium and copper in the ratio of
    (A) 50 : 50
    (B) 40 : 60
    (C) 60 : 40
    (D) 10 : 90

13. Bronze contains
    (A) 70% copper and 30% zinc
    (B) 90% copper and 10% tin
    (C) 85 - 92% copper and rest tin with little lead and nickel
    (D) 70 - 75% copper and rest tin

14. Gun metal contains
    (A) 70% copper and 30% zinc
    (B) 90% copper and 10% tin
    (C) 85 - 92% copper and rest tin with little lead and nickel
    (D) 70 - 78% copper and rest tin

15. Perminvar alloy having constant permeability is an alloy of
    (A) Nickel, copper and iron
    (B) Nickel, copper and zinc
    (C) Copper, nickel and antimony
    (D) Iron, zinc and bismuth

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