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MCQs

Total Questions : 96 | Page 9 of 10 pages
Question 81. Which of these are applications of grey cast iron?
  1.    Camshafts, engine blocks
  2.    Wear plates, pump linings
  3.    Brake shoes, pedals
  4.    Gears, rocker arms
 Discuss Question
Answer: Option A. -> Camshafts, engine blocks
Answer: (a).Camshafts, engine blocks
Question 82. Compared to copper, how is the electrical conductivity of aluminum?
  1.    Higher
  2.    Lower
  3.    Equal
  4.    Zero
 Discuss Question
Answer: Option A. -> Higher
Answer: (a).Higher
Question 83. _______ is coated onto aluminum to improve its soldering ability.
  1.    Magnesium
  2.    Lithium
  3.    Tin
  4.    Copper
 Discuss Question
Answer: Option C. -> Tin
Answer: (c).Tin
Question 84. Which aluminum alloy is known as aircraft aluminum?
  1.    6061
  2.    6063
  3.    7068
  4.    7075
 Discuss Question
Answer: Option D. -> 7075
Answer: (d).7075
Question 85. Which of these is not a property of duralumin?
  1.    High strength
  2.    1/3 the weight of steel
  3.    Excellent casting and forging abilities
  4.    Poor machinability
 Discuss Question
Answer: Option D. -> Poor machinability
Answer: (d).Poor machinability
Question 86. Which of the following is not a classification of aluminum alloys?
  1.    Crucible alloys
  2.    Wrought alloys
  3.    Cast alloys
  4.    Heat-treatable alloys
 Discuss Question
Answer: Option A. -> Crucible alloys
Answer: (a).Crucible alloys
Question 87. How much copper is present in deoxidized copper?
  1.    > 99.9%
  2.    > 99.85%
  3.    > 99.5%
  4.    > 99.35%
 Discuss Question
Answer: Option B. -> > 99.85%
Answer: (b).> 99.85%
Question 88. Which copper grade is used to manufacture semiconductors and particle accelerator components?
  1.    High conductivity copper
  2.    Deoxidised copper
  3.    Oxygen-free copper
  4.    Arsenic deoxidized copper
 Discuss Question
Answer: Option C. -> Oxygen-free copper
Answer: (c).Oxygen-free copper
Question 89. Brass is an alloy of copper and ______
  1.    Zinc
  2.    Tin
  3.    Tin and zinc
  4.    Nickel
 Discuss Question
Answer: Option A. -> Zinc
Answer: (a).Zinc
Question 90. What is the melting point of Copper?
  1.    419
  2.    600
  3.    1084
  4.    2562
 Discuss Question
Answer: Option C. -> 1084
Answer: (c).1084

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