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MCQs

Total Questions : 96 | Page 8 of 10 pages
Question 71. Which of the following is an application of leaded bronze?
  1.    Washing machine
  2.    Extractor fan
  3.    Vacuum cleaner
  4.    Aero engine
 Discuss Question
Answer: Option D. -> Aero engine
Answer: (d).Aero engine
Question 72. Which of the following is a tarnish resistant alloy?
  1.    Soft solder
  2.    Bronze
  3.    Aluminum-tin
  4.    Pewter
 Discuss Question
Answer: Option D. -> Pewter
Answer: (d).Pewter
Question 73. Soft solder is a _______ tin alloy.
  1.    Eutectic
  2.    Eutectoid
  3.    Peritectic
  4.    Peritectoid
 Discuss Question
Answer: Option A. -> Eutectic
Answer: (a).Eutectic
Question 74. What effect does cobalt have on steel?
  1.    Increases hardenability
  2.    Decreases hardenability
  3.    Changes color
  4.    No change
 Discuss Question
Answer: Option B. -> Decreases hardenability
Answer: (b).Decreases hardenability
Question 75. What is the melting point of titanium?
  1.    885°C
  2.    1680°C
  3.    1989°C
  4.    3287°C
 Discuss Question
Answer: Option B. -> 1680°C
Answer: (b).1680°C
Question 76. The alpha-beta titanium alloy is heat treatable up to _______
  1.    220°C
  2.    320°C
  3.    430°C
  4.    540°C
 Discuss Question
Answer: Option C. -> 430°C
Answer: (c).430°C
Question 77. An iron with high-silicon content is a _______
  1.    White iron
  2.    Grey iron
  3.    Malleable iron
  4.    Pig iron
 Discuss Question
Answer: Option B. -> Grey iron
Answer: (b).Grey iron
Question 78. Decomposition of cementite to form ferrite and graphite is known as _______
  1.    Decomposition of cast irons
  2.    Production of cast irons
  3.    Growth of cast irons
  4.    Prevention of growth of cast irons
 Discuss Question
Answer: Option C. -> Growth of cast irons
Answer: (c).Growth of cast irons
Question 79. What is the effect of phosphorus and sulphur in cast irons?
  1.    Induces brittleness
  2.    Increases strength
  3.    Destabilizes cementite
  4.    No effect
 Discuss Question
Answer: Option A. -> Induces brittleness
Answer: (a).Induces brittleness
Question 80. Which of the following cast irons cannot be machined?
  1.    White cast iron
  2.    Grey cast iron
  3.    Malleable cast iron
  4.    Spheroidal graphite cast iron
 Discuss Question
Answer: Option A. -> White cast iron
Answer: (a).White cast iron

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