Q. Approximate value of the modulus of elasticity for steel is about __________ Γ— 106 kg/cm2.

  • (A) 0.2
  • (B) 2
  • (C) 40
  • (D) 75
πŸ’¬ Discuss
βœ… Correct Answer: (B) 2

Q. Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property?

  • (A) Silicon
  • (B) Phosphorus
  • (C) Sulphur
  • (D) None of these
πŸ’¬ Discuss
βœ… Correct Answer: (A) Silicon

Q. An alloy used as thermocouple material comprises of 40% nickel and 60% copper. It is called

  • (A) German silver
  • (B) Chromel
  • (C) Kanthal
  • (D) Constantan
πŸ’¬ Discuss
βœ… Correct Answer: (D) Constantan

Q. Brinell Hardness Number (BHN) for talc is approximately in the range of

  • (A) 1-5
  • (B) 20-30
  • (C) 100 -150
  • (D) 200 - 250
πŸ’¬ Discuss
βœ… Correct Answer: (B) 20-30

Q. Rubber lined vessels are corroded by the action of

  • (A) Aqua regia
  • (B) Chloroform
  • (C) Sulphuric acid (95%)
  • (D) All of the above
πŸ’¬ Discuss
βœ… Correct Answer: (D) All of the above

Q. The addition of antimony in tin-based alloys improves its

  • (A) Rupture strength and hot hardness
  • (B) Impact strength and bonding strength
  • (C) Deformation resistance
  • (D) Wear resistance
πŸ’¬ Discuss
βœ… Correct Answer: (C) Deformation resistance

Q. The heat treatment process applied to cold formed steel parts is

  • (A) Normalising
  • (B) Tempering
  • (C) Artificial ageing
  • (D) Solution annealing
πŸ’¬ Discuss
βœ… Correct Answer: (D) Solution annealing

Q. The softest material just next to talc in the Mho's scale is

  • (A) Quartz
  • (B) Fluorite
  • (C) Gypsum
  • (D) Feldspar
πŸ’¬ Discuss
βœ… Correct Answer: (C) Gypsum

Q. __________ can replace tungsten in high speed steel,

  • (A) Chromium
  • (B) Vanadium
  • (C) Cobalt
  • (D) Molybdenum
πŸ’¬ Discuss
βœ… Correct Answer: (D) Molybdenum

Q. Which of the following undergoes granular fracture?

  • (A) Wrought iron
  • (B) Steel
  • (C) Cast iron
  • (D) None of these
πŸ’¬ Discuss
βœ… Correct Answer: (B) Steel

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