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MCQs

Total Questions : 96 | Page 7 of 10 pages
Question 61. Beryllium is a ductile material, before turning brittle at ______
  1.    100°C
  2.    200°C
  3.    400°C
  4.    500°C
 Discuss Question
Answer: Option D. -> 500°C
Answer: (d).500°C
Question 62. How much carbon is present in cast irons?
  1.    Less than 0.05%
  2.    Up to 1.5%
  3.    1.5% to 2%
  4.    More than 2%
 Discuss Question
Answer: Option D. -> More than 2%
Answer: (d).More than 2%
Question 63. Which element causes cementite to behave in a stable manner?
  1.    Silicon
  2.    Sulphur
  3.    Manganese
  4.    Carbon
 Discuss Question
Answer: Option B. -> Sulphur
Answer: (b).Sulphur
Question 64. If the iron surface contains graphite, it is known as ________
  1.    Alloy cast iron
  2.    White iron
  3.    Grey iron
  4.    Spheroidal graphite
 Discuss Question
Answer: Option C. -> Grey iron
Answer: (c).Grey iron
Question 65. Iron obtained from broken ______ is known as white iron.
  1.    Cementite
  2.    Graphite
  3.    Pearlite
  4.    Bainite
 Discuss Question
Answer: Option A. -> Cementite
Answer: (a).Cementite
Question 66. Cast iron is a _____ alloy.
  1.    Eutectic
  2.    Eutectoid
  3.    Peritectic
  4.    Peritectoid
 Discuss Question
Answer: Option A. -> Eutectic
Answer: (a).Eutectic
Question 67. How much antimony does a lead-base alloy contain?
  1.    13%
  2.    12%
  3.    74%
  4.    0.75%
 Discuss Question
Answer: Option A. -> 13%
Answer: (a).13%
Question 68. Plain tin bronze contains _____ of copper.
  1.    85%
  2.    88%
  3.    75%
  4.    90%
 Discuss Question
Answer: Option A. -> 85%
Answer: (a).85%
Question 69. ________ types of bearing alloys contain powdered copper and tin.
  1.    Plain tin bronze
  2.    Phosphorus bronze
  3.    Leaded bronze
  4.    Sintered bronze
 Discuss Question
Answer: Option D. -> Sintered bronze
Answer: (d).Sintered bronze
Question 70. Which type of bearing bronze is the weakest?
  1.    Plain tin bronze
  2.    Phosphorus bronze
  3.    Leaded bronze
  4.    Sintered bronze
 Discuss Question
Answer: Option C. -> Leaded bronze
Answer: (c).Leaded bronze

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