H/C ratio (by weight) for the same number of carbon atoms is the highest in case of
Octane number of n-heptane is assumed to be
In catalytic cracking, the
Deoiling is the process of removal of oil from wax. It is done by the __________ process.
Which of the following is the easiest to crack?
Isomerisation converts the __________ tot-paraffins.
A petroleum well is called 'dry', if it contains
Penetration test determines the __________ of the grease.
Higher viscosity of lubricating oil usually signifies
Pick out the wrong statement.
Which is almost absent in crude petroleum?
Removal of light fractions from crude oil is called its
The doctor's solution comprises of sodium plumbite in
Carbon/hydrogen ratio (by weight) is maximum (out of following) for
Main boring diameter for petroleum well is 20-cms in diameter, while the depth of the oil well may be about __________ kms.
Liquefied Petroleum Gas (LPG) in domestic use cylinders is in the liquid form. The density of LPG in liquid form is about __________ of that of water (i.e. 1 gm/c.c).
Which of the following has the lowest flash point of all?
The characterisation factor of a crude oil is calculated as 12.It means that; it is
Which of the following theories of origin of petroleum does not explain the presence of nitrogen & sulphur compounds in crude oil?
Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about __________ mm Hg absolute.
LPG stands for
"Breathing loss" on storage of gasoline occurs due to the
Smoke volatility index is equal to smoke point plus
Mercaptans are added to liquefied petroleum gas (LPG) to
Flash point of a liquid petroleum fuel gives an idea about its
Clay treatment of petroleum products
Pyrolysis of kerosene or natural gasoline is done to produce mainly the
Straight run petrol as compared to methyl/ethyl alcohol has
Crude oil is subjected to vacuum distillation in the last stage, because
__________ treatment is done for appreciable improvement in viscosity index of lubricating oil.
Waxy crudes are treated with chemical additives mainly to
Aniline point is the
Pressure maintained in the high pressure primary tower of a three stage crude oil distillation system is about __________ kg/cm2 .
The reservoir rock containing petroleum has
Fuel oil is subjected to visbreaking to reduce its
Aniline point test of an oil qualitatively indicates the __________ content of an oil.
Which of the following processes in oil refinery does not employ 'cracking' ?
Sweetening of petroleum product means the removal of
Naphthenic acid is a/an __________ compound.
Pick out the wrong statement.
Liquefied petroleum Gas (LPG) used for the household cooking comprises mainly of
The catalytic cracking of heavier petroleum fraction is done to produce mainly
Ethyl mercaptan is added to the Doctor negative LPG for facilitating the detection of its leakage (by bad odour) to the extent of about __________ ppm.
CnH2n is the general formula for
Cetane number of high speed diesel must be ≥
Which of the following has the highest octane number ?
Higher vapour pressure of gasoline indicates
Which of the following has the minimum °API gravity of all?
Which of the following petroleum products contain minimum sulphur ?
Octane number (unleaded) of reformed gasoline may be upto