Discussion
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- Question
Acetylene gas holder is made of
Options- A. copper
- B. cast iron
- C. steel
- D. monel metal
- Correct Answer
- steel
- 1. Shock resisting steels should possess high
Options- A. hardness
- B. toughness
- C. tensile strength
- D. wear resistance Discuss
- 2. Presence of nickel in steel improves its
Options- A. corrosion resistance.
- B. cutting ability.
- C. wear resistance.
- D. all (a), (b) and (c). Discuss
- 3. 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
- 4. 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
- 5. 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
- 6. 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
- 7. 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
- 8. 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
- 9. 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
- 10. 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
Materials and Construction problems
Search Results
Correct Answer: toughness
Correct Answer: corrosion resistance.
Correct Answer: steel or cement-brick lined.
Correct Answer: prevent the action of water.
Correct Answer: Cu (55%) & Ni (45%).
Correct Answer: Invar
Correct Answer: rather low tensile strength.
Correct Answer: deformation resistance.
Correct Answer: 12-14
Correct Answer: copper & nickel
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