Discussion
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- Question
Ceramic recuperators are generally made of
Options- A. silicon carbide.
- B. calcium carbide.
- C. fireclay bricks.
- D. high alumina bricks.
- Correct Answer
- silicon carbide.
- 1. Heavy duty bearings are usually made of
Options- A. white metal
- B. phosphorous bronze
- C. monel
- D. zinc Discuss
- 2. White cast iron is not
Options- A. malleable
- B. whitish in color
- C. brittle
- D. strong and hard Discuss
- 3. Invar used in thermocouples is an alloy of nickel and
Options- A. iron
- B. copper
- C. chromium
- D. lead Discuss
- 4. Which of the following stainless steels is non-magnetic?
Options- A. Ferritic
- B. Martensitic
- C. Austenitic
- D. None of these Discuss
- 5. German silver in an alloy of
Options- A. copper, nickel and zinc.
- B. copper, aluminium and silver.
- C. silver, zinc and aluminium.
- D. silver, nickel and zinc. Discuss
- 6. The metals occuring at the lower most position in the electromotive series
Options- A. do not resist corrosion.
- B. resist corrosion very strongly.
- C. are very brittle.
- D. are heat insulators. Discuss
- 7. Constantan is an alloy of
Options- A. Cu (55%) & Sn (45%).
- B. Cu (55%) & Ni (45%).
- C. Pt (95%) & Rh (10%).
- D. Fe (80%) & Ni (20%). Discuss
- 8. The main purpose of galvanising iron sheets is to
Options- A. harden the surface.
- B. increase its glossiness and lustre.
- C. prevent the action of water.
- D. prevent the action of oxygen. Discuss
- 9. Sulphur melting pit in the sulphuric acid plant is made of
Options- A. lead lined stainless steel.
- B. cast iron.
- C. steel or cement-brick lined.
- D. hard wood. Discuss
- 10. Presence of nickel in steel improves its
Options- A. corrosion resistance.
- B. cutting ability.
- C. wear resistance.
- D. all (a), (b) and (c). Discuss
Materials and Construction problems
Search Results
Correct Answer: white metal
Correct Answer: malleable
Correct Answer: iron
Correct Answer: Austenitic
Correct Answer: copper, nickel and zinc.
Correct Answer: resist corrosion very strongly.
Correct Answer: Cu (55%) & Ni (45%).
Correct Answer: prevent the action of water.
Correct Answer: steel or cement-brick lined.
Correct Answer: corrosion resistance.
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