Lakshya Education MCQs

Question: Choose the correct statement regarding thermal cracking.
A.Moderate changes in operating temperature does not change the depth of cracking
B.Increased residence time results in the decreased severity of cracking
C.At low pressure, the yield of lighter hydrocarbons are more
D.Greater depth of cracking gives lower octane number gasoline
Answer: Option D

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More Questions on This Topic :

Question 1. Solvent used in Edeleanu process is
  1.    Furfural
  2.    Propane
  3.    Liquid SO₂
  4.    Phenol
Answer: Option C
Question 2. In sweetening process, solutizer agent used with caustic alkali is
  1.    Potassium isobutyrate
  2.    Sodium plumbite
  3.    Methanol
  4.    Phenol
Answer: Option A
Question 3. In catalytic alkylation, higher iso-butane to olefin ratio gives
  1.    Low final boiling point product
  2.    Higher yield
  3.    Both A & B
  4.    Neither A nor B
Answer: Option A
Question 4. Aniline point is the temperature at which
  1.    Equal weight of diesel & the aniline are completely miscible
  2.    Equal weight of aniline & the test sample are completely miscible
  3.    Equal volume of aniline & the test sample are completely miscible
  4.    Aniline vaporises
Answer: Option C
Question 5. Which of the following tests is not done for transformer oil?
  1.    Flash point and acid value
  2.    Aniline point
  3.    Dielectric strength
  4.    Copper strip corrosion test
Answer: Option B
Question 6. Which of the following is the most widely used cracking process in oil refineries?
  1.    Dubbs process
  2.    T.C.C. moving bed process
  3.    Fluidised bed catalytic cracking process
  4.    Houdry's fixed bed process
Answer: Option C

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