Material of Construction for Chemical Plant Questions Online - Set 23 - ObjectiveBooks

Material of Construction for Chemical Plant Questions Online - Set 23

Practice Test: Question Set - 23

1. H2SO4 (< 50% concentration) is corrosive to
    (A) Aluminium, mild steel, stainless steel, concrete & tin
    (B) Copper, cast iron & high silicon iron (14% Si)
    (C) Rubber (butyl and hard), silicone rubber & Teflon
    (D) Glass, graphite, porcelain & stoneware

2. Percentage elongation of a material is a measure of its
    (A) Ductility
    (B) Brittleness
    (C) Toughness
    (D) Malleability

3. 'Hypersil' is a __________ steel.
    (A) High speed
    (B) Silicon
    (C) Molybdenum
    (D) Tungsten

4. Which of the following is a non-magnetic material?
    (A) Cobalt
    (B) Zinc
    (C) Nickel
    (D) None of these

5. Presence of silicon in steel
    (A) Is in the form of free Si
    (B) Indicates that steel is not deoxidized properly
    (C) Decreases the blow holes formation tendency in castings
    (D) None of these

6. 18/8 steel is a/an __________ stainless steel.
    (A) Austenitic
    (B) Ferritic
    (C) Martensitic
    (D) None of these

7. Which of the following is not a nickel based alloy?
    (A) Inconel
    (B) Hastelloys
    (C) Nimonics
    (D) Babbitt metal

8. Work hardening of a material
    (A) Decreases its tensile strength
    (B) Decreases its ductility
    (C) Increases its ductility
    (D) Does not affect its ductility

9. Which of the following is an alloy of nickel and copper?
    (A) Hastelloy
    (B) Duriron
    (C) Monel
    (D) Inconel

10. German silver in an alloy of
    (A) Copper, nickel and zinc
    (B) Copper, aluminium and silver
    (C) Silver, zinc and aluminium
    (D) Silver, nickel and zinc

11. Concentrated HCl at 30°C can be stored in a vessel made of
    (A) PTFE and porcelain
    (B) Cast iron and aluminium
    (C) Stainless steel and high silicon cast iron
    (D) None of these

12. Fermenter used in the production of penicillin by deep fermentation process is a __________ lined steel vessel
    (A) Rubber
    (B) Monel
    (C) Glass
    (D) Nickel

13. Which of the following alloying elements is present in maximum percentage in high speed steel?
    (A) Molybdenum
    (B) Chromium
    (C) Tungsten
    (D) Vanadium

14. Addition of __________ in steel can help in increasing the depth of hardness.
    (A) Nickel
    (B) Chromium
    (C) Vanadium
    (D) Tungsten

15. When the steel is subjected to normalizing, its __________ decreases.
    (A) Yield point
    (B) Ductility
    (C) Ultimate tensile strength (UTS)
    (D) None of these

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