A. Multiple of 3°F
B. Multiple of 5°F
C. 5°C below the temperature at which oil ceases to flow
D. None of these
Correct Answer: 5°C below the temperature at which oil ceases to flow ✔
Last Updated: March 02, 2019
Related MCQs
- 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)?
- Higher pressure in the reforming reactor__________?
- __________ base crude oil is also called asphaltic crude?
- The most suitable solvent for deasphalting vacuum residue is__________?
- Smoke point of kerosene is the__________?
- Which of the following petroleum products contain minimum sulphur ?
- Ethyl mercaptan is a/an __________ compound?
- The main purpose of recycling the byproduct hydrogen gas in the reformer reactor is to __________?
- Electrical desalting of crude oil removes the __________ impurities?
- Increase in the specific gravity of petroleum products indicates__________?
- The average boiling point of aviation turbine fuel is closest to that of__________?
- Aromatics are desired constituents of__________?
- Testing of the knocking characteristics of petrofuels is done in a __________ engine ?
- The solvent used in Barisol dewaxing process is__________?
- Sour crude means the __________ bearing crude?
- Quinoline is a/an __________ compound ?
- During electrical desalting of crude oil, the electrical conductivity of a mixture of crude oil and water (which ranges between 3 to 8% water) __________ with increase in the amount of water?
- Tetra-ethyl lead is added in gasoline to __________?
- Which of the following categories of gasoline has the highest lead susceptibility ?
- The amount of tetraethyl lead added to improve the octane number of motor gasoline is around __________ c.c per gallon of petrol?
- Main boring diameter for petroleum well is 20-30 cms in diameter, while the depth of the oil well may be about __________ kms?
- The order of preference for feedstock to a catalytic reformer is __________ ?
- Deoiling of wax is done by its __________?
- Which of the following processes is used for the production of petroleum coke ?
- Olefins are__________?
- Octane number of gasoline produced by two stage fluidised catalytic cracking process is__________?
- Feedstock for polymerisation is__________?
- Which of the following is an additive used for improving the cetane number of diesel ?
- Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil__________?
- Which of the following is the most widely used cracking process in oil refineries ?
- Presence of aromatics in __________?
- The main aim of cracking is to produce __________?
- Dearomatization of kerosene (by liquid sulphur dioxide extraction) is done to__________?
- Visbreaking__________?
- Flash point of an oil is determined by the __________?
- Catalyst used in catalytic polymerisation which produces polymer gasoline is__________?
- Hydrogen percentage (by weight) in crude petroleum may be about __________?
- An upper limit of oil content is limited to about __________ percent for achieving efficient and satisfactory level of wax sweating?
- 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 ?
- Solvent used for dewaxing of petroleum products are__________?
- The general formula of naphthenes is__________?
- Methyl tertiary butyl ether (MTBE), a high octane (octane no. = 115) gasoline blending component is produced by the simple additive reaction of isobutylene with __________?
- Extractor temperature is maintained at -20°C in Edeleanu process to reduce the __________ of kerosene?
- Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about __________ mm Hg absolute?
- Paraffins are desirable in lubricating oil, as it has got high__________?
- Platforming is a __________ process?
- With increase in the molecular weight of aromatic present in kerosene, its smoking tendency ?
- Which of the following is a non-regenerative fixed bed catalytic reforming process ?
- Presence of predominantly large quantity of aromatics (polynuclear) is not desirable in aviation fuel, because it has__________?
- Which of the following is desirable in petrol (gasoline) but undesirable in kerosene ?
- Which of the following factors does not govern the mechanism of petroleum formation from organic sources ?