Q.1

Which of the following reactions is undesirable in the production of catalytically reformed gasoline ?

  • Dehydrogenation of naphthene
  • Dehydrogenation of lower paraffins
  • Dehydrocyclisation of higher paraffins
  • Isomerisation of paraffins
Q.2

'Solvent naphtha' used mostly as a solvent in paints and perfumery is produced by the __________ of virgin naphtha into small boiling range cuts.

  • steam reforming
  • distillation
  • desulphurisation
  • none of these
Q.3

True vapour pressure of a petroleum fraction __________ Reid vapour pressure.

  • is less than
  • is more than
  • is same as
  • may be either more or less than
Q.4

Increase in the specific gravity of petroleum products indicates

  • decrease in paraffin content.
  • increase in thermal energy per unit weight.
  • increase in aromatic content.
  • higher H/C ratio.
Q.5

Cetane number of alpha methyl naphthalene is assumed to be

  • 0
  • 100
  • 50
  • ∞
Q.6

Petroleum deposits are detected by the.

  • oil seepage at the surface of the earth.
  • measuremet of density, elasticity and magnetic & electric properties of the rock in the crust of the earth.
  • age & nature of rocks inside the crust of the earth.
  • all (a), (b) and (c)
Q.7

Which one is preferred for aircraft engine ?

  • High viscosity index lube oil.
  • Low viscosity index lube oil.
  • High freezing point aviation fuel.
  • None of these.
Q.8

Feedstock for polymerisation is

  • naphtha.
  • cracked gases rich in C2 & C4 olefins.
  • low boiling aromatics.
  • none of these.
Q.9

__________ base crude oil is also called asphaltic crude.

  • Paraffinic
  • Naphthenic
  • Mixed
  • Aromatic
Q.10

Which of the following is the most important property for a jet fuel ?

  • Cloud point
  • Pour point
  • Colour
  • Freezing point
Q.11

Thermofer catalytic cracking process is a __________ process.

  • fixed bed
  • moving bed
  • fluidised bed
  • non-catalytic
Q.12

Pressure & temperature maintained in catalytic cracking is about

  • 2atm & 500°C
  • 10atm & 500°C
  • 30atm & 200°C
  • 50atm. & 750°C
Q.13

Pick out the wrong statement.

  • Pensky-Marten apparatus is used for determining flash points above 50°C.
  • Characterisation factor of paraffinic crude oil is more than 12.
  • Abel apparatus is used for determining flash points below 50°C.
  • An oil having high susceptibility to change in viscosity with temperature changes, has a high viscosity index.
Q.14

Products drawn from the top to bottom of the crude oil distillation column has progressively increasing

  • boiling points
  • molecular weight
  • C/H ratio
  • all (a), (b) and (c)
Q.15

Good quality kerosene should have

  • low smoke point.
  • high smoke point.
  • high aromatics content.
  • low paraffins content.
Q.16

The most suitable solvent for deasphalting vacuum residue is

  • propane
  • methyl ethyl ketone
  • doctor's solution
  • methanol amine
Q.17

Which of the following has the highest flash point of all ?

  • Diesel
  • Kerosene
  • Petrol
  • Furnace oil
Q.18

Hydrocracking employs

  • high pressure & temperature.
  • low pressure & temperature.
  • high pressure and low temperature.
  • high temperature and low pressure.
Q.19

Which of the following processes is used for the production of petroleum coke ?

  • Stabilisation
  • Visbreaking
  • Cracking
  • Reforming
Q.20

Quinoline is a/an __________ compound.

  • sulphur
  • nitrogen
  • oxygen
  • none of these
Q.21

Methyl tertiary butyl ether (MTBE), a high octane (octane no. =gasoline blending component is produced by the simple additive reaction of isobutylene with

  • methyl alcohol
  • ethyl alcohol
  • methane
  • ethane
Q.22

LPG when brought to atmospheric pressure & temperature will be a

  • liquid lighter than water.
  • liquid heavier than water.
  • gas lighter than air.
  • gas heavier than air.
Q.23

Pick out the correct statement pertaining to catalytic cracking.

  • With increase in the reactor pressure, octane number of gasoline decreases.
  • With increase in the reactor temperature, gasoline yield decreases for a given conversion.
  • Percentage conversion increases with increase in the catalyst to oil ratio.
  • all (a), (b) and (c).
Q.24

Platforming is a __________ process.

  • moving bed
  • fluidised bed
  • non-regenerative & fixed bed
  • regenerative
Q.25

Which parameter is used for the grading of paraffin waxes ?

  • Specific gravity
  • Melting point
  • Viscosity
  • Penetration number
Q.26

1 centistoke is equal to __________ Redwood I seconds.

  • 1
  • 4.08
  • 0.408
  • 40.8
Q.27

Char value of Kerosene is the amount of charred oil deposition on the wick obtained after burning it in a standard wick lamp at a standard rate forhours. Char value of a good quality kerosene should be less than __________ mg/kg of kerosene.

  • 1
  • 20
  • 100
  • 500
Q.28

Asphalts are

  • low molecular weight & low boiling point compounds present in petroleum.
  • desirable in catalytic cracking feedstock, because they produce coke.
  • readily oxidisable and form carbonaceous sludge.
  • all (a), (b) & (c).
Q.29

Paraffins are desirable in lubricating oil, as it has got high

  • viscosity
  • viscosity index
  • smoke point
  • pour point
Q.30

The characterisation factor of crude petroleum oil is around

  • 3
  • 11
  • 22
  • 28
Q.31

Sour crude means the __________ bearing crude.

  • asphalt
  • sulphur compounds
  • wax
  • nitrogen compounds
Q.32

Crude oils containing more than __________ kg of total salts (expressed in terms of NaCl) per thousand barrel is called a 'salty crude'.

  • 1
  • 5
  • 15
  • 25
Q.33

Performance number of a liquid fuel is related to its

  • wax content
  • spontaneous ignition temperature
  • knocking tendency
  • sulphur content
Q.34

Pick out the correct statement.

  • Paraffins have higher octane number than corresponding iso-paraffin.
  • Paraffins have lower smoke point than aromatics.
  • Suitability of kerosene as a fuel & as an illuminant may be determined by char value test.
  • Aviation fuel should have very high cloud point.
Q.35

Which of the following is a naphthene ?

  • Butene
  • Butadiene
  • Cyclohexane
  • Acetylene
Q.36

Aromatics have the highes __________ of all the hydrocarbons of same carbon atoms.

  • smoke point
  • octane number
  • cetane number
  • viscosity
Q.37

Higher boiling fractions like atmospheric residue is distilled under vacuum at low temperature because at high temperature, there is a tendency of the predominance of

  • thermal cracking
  • gum formation
  • coking
  • discoloration
Q.38

Highest quality bitumen is produced from the __________ crude oil.

  • paraffinic
  • naphthenic
  • intermediate
  • mixed
Q.39

Smoke point of kerosene is the

  • time after which smoking starts on burning.
  • temperature at which smoking starts.
  • maximum height of flame (in mm) without causing smoking, when burnt in a standard lamp.
  • none of these.
Q.40

Cetane number of a diesel fuel is the measure of its

  • ignition delay
  • smoke point
  • viscosity
  • oxidation stability
Q.41

Aniline point of the diesel is a measure of its __________ content.

  • aromatic
  • paraffin
  • olefin
  • naphthene
Q.42

Reid vapour pressure of gasoline is the measure of its

  • pour point
  • cloud point
  • vapour locking tendency
  • carbon residue
Q.43

Naphtha yield in straight run distillation of crude oil may be about __________ percent.

  • 2
  • 6
  • 12
  • 18
Q.44

Crude petroleum oil is a __________ fuel.

  • primary
  • fossil
  • both (a) & (b)
  • secondary
Q.45

Molecular weight of crude oil is in the range of

  • 100-120
  • 230-250
  • 450-550
  • 600-850
Q.46

Which is the most ideal feed stock for 'coking' process used for the manufacture of petroleum coke ?

  • Naphtha
  • Vacuum residue
  • Light gas oil
  • Diesel
Q.47

The conductivity of crude oil-water mixture depends on the

  • pH value
  • water percentage
  • temperature
  • all (a), (b) and (c)
Q.48

Which parameter is used for the grading of paraffin waxes ?

  • Specific gravity
  • Melting point
  • Viscosity
  • Penetration number
Q.49

Presence of sulphur in gasoline

  • leads to corrosion.
  • increases lead susceptibility.
  • decreases gum formation.
  • helps during stabilisation.
Q.50

Which of the following additives improves the cetane number of diesel ?

  • Amyl nitrate
  • Ethyl mercaptan
  • Napthenic acid
  • Tetra ethyl lead
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