Lakshya Education MCQs

Question: Cetane number of high speed diesel must be?
Options:
A.30
B.45
C.75
D.95
Answer: Option B

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Question 1. True boiling point apparatus is used for the
  1.    Determination of characterisation factor
  2.    Evaluation of oil stocks
  3.    Determination of true vapour pressure
  4.    None of these
Answer: Option D
Question 2. Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatisation by liquid SO₂ extraction (Edeleanu process), its smoke point may become __________ mm.
  1.    5
  2.    10
  3.    25
  4.    100
Answer: Option C
Question 3. Smoke point of kerosene expresses its
  1.    Burning characteristics
  2.    Luminosity characteristics
  3.    Aromatic content directly
  4.    Lamp wick wetting characteristics
Answer: Option A
Question 4. Flash point of an oil gives an idea of the
  1.    Nature of boiling point diagram of the system
  2.    Amount of low boiling fraction present
  3.    Explosion hazards
  4.    All of the above
Answer: Option A
Question 5. Flash point of an oil is determined by the
  1.    Pensky Martens apparatus
  2.    Ramsbottom apparatus
  3.    Saybolt viscometer
  4.    Conradson apparatus
Answer: Option A
Question 6. Iso-octane is used as a reference substance in the definition of octane number and it is assigned an octane number value of 100. Iso-octance is chemically known as
  1.    α-methyl naphthalene
  2.    2-2-4 tri methyl pentane
  3.    1, 3 butadiene
  4.    Tetra methyl ethylene
Answer: Option B

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