Lakshya Education MCQs

Question: Which of the following material of construction may be recommended by a chemical engineer for handling a gaseous chlorine (dry or wet) stream in a fluid flow system?
A.High silicon iron, silicon rubber, Kel-F and teflon
B.Mild steel and stainless steel
C.Cast iron, tin and aluminium
D.Copper, nickel and monel
Answer: Option A

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Question 1. Brass tubes are used in the manufacture of tubes of evaporators used in sugar and salt industries, mainly because of its
  1.    High co-efficient of thermal expansion
  2.    Low thermal conductivity
  3.    High corrosion resistance
  4.    All of the above
Answer: Option C
Question 2. Rotary kilns in cement industry are lined with____bricks.
  1.    Fireclay
  2.    Silica
  3.    Lead
  4.    High alumina & high magnesia
Answer: Option D
Question 3. The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon.
  1.    0.2
  2.    2
  3.    4
  4.    8
Answer: Option C
Question 4. The ability of a material to absorb energy in the elastic range is a measure of its
  1.    Toughness
  2.    Resilience
  3.    Malleability
  4.    Brittleness
Answer: Option B
Question 5. The digester of a Gobar gas plant is a
  1.    Mild steel drum
  2.    Stainless steel vessel
  3.    Masonry well
  4.    Cast iron vessel
Answer: Option C
Question 6. Stainless steel contains
  1.    Chromium and nickel
  2.    Copper
  3.    Aluminium
  4.    Vanadium
Answer: Option A

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