Discussion
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- Question
18/8 steel is a/an __________ stainless steel.
Options- A. austenitic
- B. ferritic
- C. martensitic
- D. none of these
- Correct Answer
- austenitic
- 1. Softness of silver can be converted into hardness by alloying it with small quantity of
Options- A. copper & nickel
- B. zinc
- C. aluminium
- D. tin Discuss
- 2. Austenitic manganese steel used for making jaws of crushing machines contains about __________ percent manganese.
Options- A. 1.5-2
- B. 3.5-4.5
- C. 7-9
- D. 12-14 Discuss
- 3. The addition of antimony in tin-based alloys improves its
Options- A. rupture strength and hot hardness.
- B. impact strength and bonding strength.
- C. deformation resistance.
- D. wear resistance. Discuss
- 4. Aluminium as a material of construction suffers from the disadvantage of
Options- A. very high cost.
- B. rather low tensile strength.
- C. very low strength to weight ratio.
- D. scarce availability. Discuss
- 5. Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (l/20th of ordinary metals)?
Options- A. Invar
- B. Constantan
- C. Chromel
- D. Alumel Discuss
- 6. Liquid ammonia is shipped in __________ containers.
Options- A. steel
- B. aluminium
- C. glass
- D. lead lined Discuss
- 7. A suitable material of construction to use with fuming sulphuric acid is
Options- A. carbon steel
- B. stainless steel type 304
- C. nickel
- D. monel Discuss
- 8. The hardest material just prior to diamond in Mho's scale is
Options- A. topax
- B. carborundum
- C. corrundum
- D. calcite Discuss
- 9. Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with
Options- A. karbate
- B. lead or glass
- C. fireclay bricks
- D. PVC Discuss
- 10. Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets.
Options- A. chromium
- B. nickel
- C. tungsten
- D. cobalt Discuss
Materials and Construction problems
Search Results
Correct Answer: copper & nickel
Correct Answer: 12-14
Correct Answer: deformation resistance.
Correct Answer: rather low tensile strength.
Correct Answer: Invar
Correct Answer: glass
Correct Answer: monel
Correct Answer: corrundum
Correct Answer: lead or glass
Correct Answer: cobalt
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