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MCQs

Total Questions : 1977 | Page 9 of 198 pages
Question 81. Chromel (Nichrome) is an alloy of
  1.    Chromium and molybdenum
  2.    Nickel and chromium
  3.    Molybdenum and nickel
  4.    Chromium and aluminium
 Discuss Question
Answer: Option B. -> Nickel and chromium
Question 82. The metals occuring at the lower most position in the electromotive series
  1.    Do not resist corrosion
  2.    Resist corrosion very strongly
  3.    Are very brittle
  4.    Are heat insulators
 Discuss Question
Answer: Option B. -> Resist corrosion very strongly
Question 83. Atmospheric corrosion of metals result from their
  1.    Slow oxidation
  2.    Fast oxidation
  3.    Fast hydration
  4.    Slow dehydration
 Discuss Question
Answer: Option A. -> Slow oxidation
Question 84. Condenser tubes are not made of
  1.    Cartridge brass
  2.    Muntz brass
  3.    Wood metal
  4.    Aluminium brass alloy
 Discuss Question
Answer: Option C. -> Wood metal
Question 85. Which of the following is the most prone to atmospheric corrosion?
  1.    Silver
  2.    Iron
  3.    Tin
  4.    Copper
 Discuss Question
Answer: Option B. -> Iron
Question 86. Bronze is an alloy of copper and
  1.    Lead
  2.    Tin
  3.    Nickel
  4.    Zinc
 Discuss Question
Answer: Option B. -> Tin
Question 87. Material of construction of pipe generally used for conveying water in India is
  1.    Stainless steel
  2.    Cast iron
  3.    Wrought iron
  4.    Lead lined steel
 Discuss Question
Answer: Option B. -> Cast iron
Question 88. Centrifugal pump made of pyrex or glass can't be used to pump
  1.    Milk and fruit juices
  2.    Alkaline solutions
  3.    Dilute H₂SO₄ at room temperature
  4.    Brine
 Discuss Question
Answer: Option B. -> Alkaline solutions
Question 89. Tank furnace used for melting of glass is made of
  1.    Mild steel
  2.    Cast iron
  3.    Refractory blocks
  4.    Stainless steel
 Discuss Question
Answer: Option C. -> Refractory blocks
Question 90. Babbit metal used for making bearings should have
  1.    High-co-efficient of friction between journal and bearing
  2.    Ability to retain lubricant on its surface
  3.    Low co-efficient of friction between journal and bearing
  4.    Both B & C
 Discuss Question
Answer: Option A. -> High-co-efficient of friction between journal and bearing

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