Green Construction Materials Exam Questions - Set 13 - ObjectiveBooks

Green Construction Materials Exam Questions - Set 13

Practice Test: Question Set - 13

1. Softening of hardened steel is done by its
    (A) Normalizing
    (B) Tempering
    (C) Annealing
    (D) Carburizing

2. Which of the following crystal structures characterizes the ferritic stainless steel?
    (A) Face centered cubic
    (B) Body centred cubic
    (C) Simple hexagonal
    (D) None of these

3. Pick out the wrong statement.
    (A) Alloys are harder than their component elements
    (B) Presence of silicon in steel decreases its electrical resistance
    (C) Karbate is an acid resistant material of construction
    (D) Nichrome, a steel alloyed with 10% Ni and 20% Cr can be used upto a temperature of 1100°C

4. Which is the purest form of iron?
    (A) Wrought iron
    (B) Pig iron
    (C) Bessemer iron
    (D) Grey iron

5. The 'bomb' in the bomb calorimeter is made of
    (A) Molybdenum stainless steel
    (B) Mild steel
    (C) High silicon iron (14% Si)
    (D) Copper

6. Slow plastic deformation of metals under a constant stress is termed as __________ failure.
    (A) Fatigue
    (B) Endurance
    (C) Creep
    (D) None of these

7. Hardened steel is softened by
    (A) Normalizing
    (B) Tempering
    (C) Annealing
    (D) Carburizing

8. Stainless steel contains
    (A) Chromium and nickel
    (B) Copper
    (C) Aluminium
    (D) Vanadium

9. Which has the maximum melting point out of the following?
    (A) Steel
    (B) Cast iron
    (C) Stainless steel
    (D) Wrought iron

10. Chilled iron castings are
    (A) Easily machinable
    (B) Soft on surface
    (C) Highly wear resistant
    (D) None of these

11. Cast iron vessels are not suitable for the storage of
    (A) Freon
    (B) H2SO4 (95%) at room temperature
    (C) H2SO4 (fuming)
    (D) Wet SO2

12. Brass container is suitable for storing
    (A) Aqueous ammonia
    (B) Beer
    (C) H2SO4 (95%)
    (D) Phosphoric acid (95%)

13. Carbon supply in pack carburizing process is in the form of
    (A) Charcoal
    (B) Calcium carbide
    (C) Hydrocarbon oil
    (D) Graphite

14. Which of the following is a low melting point metal?
    (A) Stainless steel
    (B) Wrought iron
    (C) Tin
    (D) Copper

15. Maximum consumption of copper is in
    (A) Utensil manufacture
    (B) Electrical industry
    (C) Industrial equipment manufacture
    (D) Small scale industries

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