A. pH of the soil
B. Bacterial action
C. Heat
D. Pressure
Correct Answer: pH of the soil ✔
Last Updated: March 02, 2019
Related MCQs
- Maximum viscosity of tar/PCM/fuel oil for easy and efficient atomisation in conventional burner is __________ centistokes (or 100 Redwood I seconds) ?
- Aromatics have the highest __________ of all the hydrocarbons of same carbon atoms?
- Lane and Garton classification of petroleum is based on its __________?
- Road grade bitumen is produced from vacuum residue by its __________?
- Products drawn from the top to bottom of the crude oil distillation column has progressively increasing __________?
- 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-octane is chemically known as __________?
- Cetane number of a diesel fuel is the measure of its__________?
- Water content in the crude oil as it comes out of oil well may be upto __________ percent?
- Tetraethyl lead is added to the petrol to increase its octane number, because its octane number is __________?
- Aniline point is the temperature at which__________?
- Asphalts are __________?
- “Breathing loss” on storage of gasoline occurs due to the __________?
- Thermofor catalytic cracking process is a __________ process?
- __________ treatment is done for appreciable improvement in viscosity index of lubricating oil?
- Water separometer index (modified) (WSIM) of a petrofuel is the measure of its__________?
- Sweetening of petroleum product means the removal of __________?
- Aniline point of high speed diesel may be about __________ °C ?
- Which of the following theories of origin of petroleum does not explain the presence of nitrogen & sulphur compounds in crude oil ?
- Octane number (unleaded) of reformed gasoline may be upto __________?
- Which of the following gasoline (unleaded) has the least octane number ?
- A multigrade lubricating oil means an oil having high __________?
- Reforming__________?
- Feed for reforming is generally__________?
- H/C ratio (by weight) for the same number of carbon atoms is the highest in case of__________?
- Highest quality bitumen is produced from the __________ crude oil?
- Molecular weight of petrol may be about __________?
- A typical yield of kerosene in straight run distillation of crude oil may be about __________ percent?
- Casing head gasoline is the liquid __________?
- The pressure (kg/cm2) and temperature (°C) maintained in electrical desalters for crude oil are respectively__________?
- A good lubricant should have high __________ ?
- Name the hydrocarbon having the poorest oxidation stability ?
- Phenols are added in gasoline to__________?
- Paraffin base crude oil as compared to asphalt base crude gives__________?
- Flash point of an oil gives an idea of the__________?
- 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?
- The reservoir rock containing petroleum has__________?
- Which is an anticing compound ?
- Polymerisation__________?
- Which of the following constituents present in petroleum is responsible for ash formation ?
- Aniline point is a property of the__________?
- Clay treatment of petroleum products __________?
- The main reaction in reforming is the __________?
- Percentage of straight run gasoline in a typical crude oil may be around__________?
- Gasoline yield in catalytic reforming of naphtha may be about __________ percent by weight?
- The terminology used for the bottom most product from the vacuum crude distillation unit is__________?
- Waxes present in petroleum products__________?
- Pyrolysis of kerosene or natural gasoline is done to produce mainly the__________?
- Which of the following is the most important property for a jet fuel ?
- Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm2 is maintained during cracking mainly to__________?
- Crude oil is transported inland from oil field to refineries, mainly by the __________?
- Flash point of atmospheric distillation residue is determined by __________ apparatus?