Q.1

Liquefied Petroleum Gas (LPG) is mainly a mixture of

  • propane & butane
  • methane & ethane
  • high boiling olefins
  • high boiling naphthenes
Q.2

Which of the following factors does not govern the mechanism of petroleum formation from organic sources ?

  • pH of the soil
  • Bacterial action
  • Heat
  • Pressure
Q.3

Petroleum coke is commercially produced by the __________ process.

  • hydrocracking
  • visbreaking
  • fluid catalytic cracking
  • delayed coking
Q.4

In case of liquid petrofuels, momentary combustion is observed at its

  • flash point.
  • preheating temperature corresponding to viscosity of 25 centistokes.
  • flame temperature.
  • fire point.
Q.5

Older crude petroleum

  • is light and better.
  • gives more distillates.
  • gives less tar.
  • all (a), (b) and (c).
Q.6

Which one of the following processes aims at producing higher yield of gaseous unsaturated hydrocarbons and aromatics like benzene & toluene ?

  • Reforming
  • Pyrolysis
  • Alkylation
  • Hydrocracking
Q.7

Which of the following is the most widely used cracking process in oil refineries ?

  • Dubbs process.
  • T.C.C. moving bed process.
  • Fluidised bed catalytic cracking process.
  • Houdry's fixed bed process.
Q.8

Catalyst used in the catalytic polymerisation is

  • phosphoric acid on kieselghur
  • aluminium chloride
  • nickel
  • vanadium pentaoxide
Q.9

The main aim of cracking is to produce

  • gasoline
  • lube oil
  • petrolatum
  • coke
Q.10

The main purpose of recycling the byproduct hydrogen gas in the reformer reactor is to

  • obviate catalyst poisoning.
  • maintain the reaction temperature.
  • sustain the reactor pressure.
  • hydrogenate the feed stock.
Q.11

The main reaction in reforming is the

  • dehydrogenation of naphthenes.
  • hydrogenation of naphthenes.
  • hydrocracking of paraffins.
  • saturation of olefins.
Q.12

Carbon percentage (by weight) in crude petroleum may be about

  • 65
  • 75
  • 85
  • 95
Q.13

With increase in the number of carbon and hydrogen atoms in hydrocarbon molecules, the density of petroleum products

  • decreases
  • increases
  • remains same
  • unpredictable from the data
Q.14

Flash point of diesel/kerosene (>50°C) is determined by the

  • Abel apparatus
  • Pensky-Martens apparatus
  • Saybolt chromometer
  • none of these
Q.15

Ethyl mercaptan is a/an __________ compound.

  • sulphur
  • nitrogen
  • oxygen
  • none of these
Q.16

Water separometer index (modified) (WSIM) of a petrofuel is the measure of its

  • emulsification tendency.
  • water separation characteristics.
  • water content.
  • water absorbing capacity from atmosphere.
Q.17

The vacuum maintained in vacuum distillation unit for reduced crude is about __________ mmHg.

  • 1.2
  • 12
  • 120
  • 700
Q.18

Extractor temperature is maintained at -20°C in Edeleanu process to reduce the __________ of kerosene.

  • smoke point
  • paraffins
  • aromatics
  • naphthenes
Q.19

Cracking is

  • an exothermic reaction.
  • an endothermic reaction.
  • favoured at very low temperature.
  • none of these.
Q.20

Hydrogen content in petroleum products varies fromto(by weight). As a result the difference between gross and net heating value of petroleum fuels varies in the range of __________ kcal/kg.

  • 600-750
  • 250-350
  • 1000-1500
  • 2000-2500
Q.21

Natural gasoline is produced

  • from oil wells
  • in oil refineries
  • by natural gas stripping
  • none of these
Q.22

Main constituent of natural gas is

  • CH4
  • C2H2
  • C2H4
  • C2H6
Q.23

Pick out the wrong statement.

  • Multigrade lubricating oils have high viscosity index.
  • Paraffinic oil has very high viscosity index.
  • Naphthenic oil has very low viscosity index.
  • High viscosity index means a large change in viscosity with change in temperature.
Q.24

Water content in the crude oil as it comes out of oil well may be upto __________ percent.

  • 2
  • 5
  • 10
  • 25
Q.25

Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about __________ mm Hg (absolute).

  • 5-10
  • 30-80
  • 150-250
  • 350-400
Q.26

Crude oil produced by Indian oil fields are predominantly __________ in nature.

  • paraffinic
  • naphthenic
  • asphaltic
  • mixed base
Q.27

In solutizer sweetening process, solutizer solution used is

  • methanol in Unisol process.
  • naphthenic acid in Mercapsol process.
  • both (a) and (b).
  • neither (a) nor (b).
Q.28

Polymerisation

  • produces i-octane from cracked gases containing i-butane and butene.
  • causes olefins to combine with each other.
  • causes aromatics to combine with each other.
  • is aimed at producing lubricating oil.
Q.29

Octane number (unleaded) of gasoline produced by isomerisation of butane may be about

  • 45
  • 55
  • 70
  • 90
Q.30

The best method of determining sulphur in crude oil is by the __________ method.

  • Kjeldah
  • Duma
  • Bomb calorimeter
  • Junkar's calorimeter
Q.31

Which of the following gasolines (unleaded) has the least octane number ?

  • Catalytically cracked gasoline
  • Straight run gasoline
  • Catalytically reformed gasoline
  • Polymer gasoline
Q.32

Diesel index is defined as

  • (°API) x (Aniline Point, °F)/100
  • (°API) x (Aniline Point, °C)/100
  • (°API) x (100)/Aniline Point, °F
  • (°API) x (100)/Aniline Point, °C
Q.33

Petroleum liquid fuels having flash point greater than 66°C is considered as safe during storage and handling. Which of the following has flash point > 66°C ?

  • Naphtha
  • Petrol
  • Kerosene
  • Heavy fuel oil
Q.34

The general formula of naphthenes is

  • CnH2n + 2
  • CnH2n-6 (where, n ≥ 6)
  • CnHn-4
  • same as that for olefins i.e. CnH2n
Q.35

The order of preference for feedstock to a catalytic reformer is

  • catalytic naphtha - coking naphtha - virgin naphtha.
  • coking naphtha - virgin naphtha - catalytic naphtha.
  • virgin naphtha - catalytic naphtha - coking naphtha.
  • virgin naphtha - coking naphtha - catalytic naphtha.
Q.36

Smoke point of a good burning kerosene may be around __________ mm.

  • 0-5
  • 20-25
  • 60-75
  • 100-120
Q.37

Visbreaking

  • uses natural gas as feed.
  • is carried out at atmospheric pressure.
  • produces fuel oil of lower viscosity.
  • produces gasoline only.
Q.38

The most important property for a jet fuel is its

  • viscosity
  • freezing point
  • calorific value
  • flash point
Q.39

Which of the following processes consumes hydrogen ?

  • Fluid catalytic cracking
  • Visbreaking
  • Propane deasphalting
  • None of these
Q.40

Research octane number refers to the

  • low octane number motor fuels.
  • high octane number motor fuels.
  • high octane number aviation fuels.
  • unleaded motor fuels.
Q.41

Which of the following contains maximum sulphur ?

  • Diesel
  • Petrol
  • Kerosene
  • Fuel oil
Q.42

Both asphalt and wax are produced by __________ base crude oils.

  • naphthenic
  • asphalt
  • paraffin
  • mixed
Q.43

In a refinery petroleum crude is fractionated into gas fraction, light ends, intermediate distillates, heavy distillates, residues and by products. The group of products including gas oil, diesel oil and heavy fuel oil belongs to the fraction

  • heavy distillates
  • intermediate distillates
  • light ends
  • residues
Q.44

Catalyst used in alkylation process is

  • sulphuric acid
  • nickel
  • silica gel
  • alumina
Q.45

Feed for reforming is generally

  • naphtha or straight run gasoline.
  • reduced crude.
  • vacuum gas oil.
  • atmospheric gas oil.
Q.46

The condesate obtained on compression of wet natural gas is termed as

  • liquefied natural gasoline
  • natural gasoline
  • liquid natural gas
  • none of these
Q.47

Maximum viscosity of tar/PCM/fuel oil for easy and efficient atomisation in conventional burner is __________ centistokes (orRedwood I seconds).

  • 5
  • 25
  • 50
  • 100
Q.48

The solvent used in Barisol dewaxing process is

  • hexane
  • furfural
  • benzol and ethylene dichloride
  • methyl ethyl ketone (MEK)
Q.49

Tetraethyl lead is added to the petrol to increase its octane number, because its octane number is

  • more than 100
  • round about 100
  • between 50 and 100
  • less than 25
Q.50

Which of the following is not a sulphur compound present in petroleum ?

  • Thiophenes
  • Mercaptans
  • Sulphones
  • Pyroles
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