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MCQs

Total Questions : 1535 | Page 151 of 154 pages
Question 1501. 5. Cast iron contains carbon
  1.    = 2%
  2.    < 0.8%
  3.    < 2%
  4.    > 2%
 Discuss Question
Answer: Option D. -> > 2%
Question 1502. 6. Spherodite is the structure obtained by
  1.    Quenching austenite
  2.    Quenching austenite and then heating into the range of 200° to 375°C
  3.    Quenching austenite and then heating into the range of 375° to 660°C
  4.    Quenching austenite and then heating into the range of 660° to 700°C
 Discuss Question
Answer: Option A. -> Quenching austenite
Question 1503. 7. The following structure is obtained by austempering process of heat treatment
  1.    Troostite
  2.    Martensite
  3.    Sorbite
  4.    Bainite
 Discuss Question
Answer: Option D. -> Bainite
Question 1504. 8. Steels are primarily designated according to
  1.    Iron content
  2.    Carbon content
  3.    Alloying elements
  4.    Hardness
 Discuss Question
Answer: Option C. -> Alloying elements
Question 1505. 9. The structure obtained by heating a steel above critical point and then quenching in water is
  1.    Martensite
  2.    Sorbite
  3.    Acicular
  4.    Bainite
 Discuss Question
Answer: Option C. -> Acicular
Question 1506. 0. Sorbite is the structure obtained by
  1.    Quenching austenite
  2.    Quenching austenite and then heating into the range of 200° to 375°C
  3.    Quenching austenite and then heating into the range of 375°-660°C
  4.    Quenching austenite and then heating into the range of 600°-700°C
 Discuss Question
Answer: Option A. -> Quenching austenite
Question 1507. 1. Toughness of a material means
  1.    Strength
  2.    Machinability
  3.    Stress relieving
  4.    Softening
 Discuss Question
Answer: Option A. -> Strength
Question 1508. 3. The constituents of Hayness stellite, having superior performance than HSS are
  1.    Tungsten, chromium and vanadium
  2.    Tungsten, chromium and cobalt
  3.    Tungsten, molybdenum and cobalt
  4.    Cobalt, nickel and aluminium
 Discuss Question
Answer: Option B. -> Tungsten, chromium and cobalt
Question 1509. 4. Line A1 on iron-carbon diagram indicates
  1.    The begining of transition from austenite to ferrite
  2.    Completion of austenite transition to ferrite and pearlite
  3.    Limit of carbon solubility in austenite
  4.    All or the above
 Discuss Question
Answer: Option B. -> Completion of austenite transition to ferrite and pearlite
Question 1510. 2. White cast iron is produced by the following operation on grey cast iron
  1.    Rapid cooling
  2.    Slow cooling
  3.    Rapid heating
  4.    Tempering
 Discuss Question
Answer: Option C. -> Rapid heating

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