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MCQs

Total Questions : 1977 | Page 5 of 198 pages
Question 41. Galvanising is not a zinc diffusion process. A zinc diffusion process is termed as
  1.    Sheradising
  2.    Parkerising
  3.    Anodising
  4.    None of these
 Discuss Question
Answer: Option A. -> Sheradising
Question 42. Nitriding of steel is a process for
  1.    Case hardening
  2.    Spheroidising
  3.    Normalising
  4.    Annealing
 Discuss Question
Answer: Option A. -> Case hardening
Question 43. The loss of strength in compression which occurs, when there is a gain of strength in tension due to over loading is called
  1.    Bauschinger effect
  2.    Hooke's effect
  3.    Hysterisis
  4.    Relaxation
 Discuss Question
Answer: Option A. -> Bauschinger effect
Question 44. Duralumin is an alloy of
  1.    Aluminium, copper and manganese
  2.    Aluminium, nickel and silicon
  3.    Aluminium and nickel
  4.    None of these
 Discuss Question
Answer: Option A. -> Aluminium, copper and manganese
Question 45. Duriron is
  1.    Acid resistant, brittle and very hard
  2.    High silicon iron
  3.    Prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 46. Which of the following crystal structures characterises the austenitic stainless steel?
  1.    Simple hexagonal
  2.    Body centred cubic
  3.    Face centred cubic
  4.    None of these
 Discuss Question
Answer: Option C. -> Face centred cubic
Question 47. Which of the following is a light alloy?
  1.    Monel metal
  2.    Dow metal
  3.    German silver
  4.    Babbit metal
 Discuss Question
Answer: Option B. -> Dow metal
Question 48. Which of the following has no effect on the carbide forming tendency in steels?
  1.    Molybdenum
  2.    Phosphorus
  3.    Chromium
  4.    Vanadium
 Discuss Question
Answer: Option B. -> Phosphorus
Question 49. Which of the following has a very high carbide forming tendency in steels?
  1.    Silicon
  2.    Chromium
  3.    Nickel
  4.    Vanadium
 Discuss Question
Answer: Option D. -> Vanadium
Question 50. Cast irons are generally specified by their
  1.    Carbon content
  2.    Tensile strength
  3.    Hardness
  4.    Manufacturing proces
 Discuss Question
Answer: Option B. -> Tensile strength

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