37252. Percentage of straight run gasoline in a typical crude oil may be around
37253. Road grade bitumen is produced from vacuum residue by its
37254. 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).
37255. 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.
37256. CnH2n is the general formula for
37257. Natural gas recovered along with crude oil from oil wells is called wet natural gas which has a higher __________ compared to the dry natural gas.
37258. Power factor of high speed motor compared to a low speed motor will be
37259. H/C ratio (by weight) for the same number of carbon atoms is the highest in case of
37260. Which of the following theories of origin of petroleum does not explain the presence of nitrogen & sulphur compounds in crude oil?
37261. Higher vapour pressure of gasoline indicates
37262. 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-octance is chemically known as
37263. Pour point of a petrofuel is
37264. In catalytic cracking, the
37265. LPG stands for
37266. "Breathing loss" on storage of gasoline occurs due to the
37267. Which is an anticing compound ?
37268. The terminology used for the bottom most product from the vacuum crude distillation unit is
37269. Which of the following is the easiest to crack?
37270. Flash point of a liquid petroleum fuel gives an idea about its
37271. Clay treatment of petroleum products
37272. Presence of predominantly large quantity of aromatics (polynuclear) is not desirable in aviation fuel, because it has
37273. Catalyst used in isomerisation process is
37274. __________ treatment is done for appreciable improvement in viscosity index of lubricating oil.
37275. A multigrade lubricating oil means an oil having high
37276. Most widely used solvent for dewaxing is
37277. Liquefied Petroleum Gas (LPG) is mainly a mixture of
37278. Water content in the crude oil as it comes out of oil well may be upto __________ percent.
37279. Waxy crudes are treated with chemical additives mainly to
37280. __________ chloride present in crude petroleum as impurity is the most prolific producer of HCl during distillation.
37281. Molecular weight of petrol may be about
37282. Which of the following factors does not govern the mechanism of petroleum formation from organic sources ?
37283. Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about __________ mm Hg (absolute).
37284. Octane number of n-heptane is assumed to be
37285. Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about __________ mm Hg absolute.
37286. Which of the following petroleum products contain minimum sulphur ?
37287. Concentration of H2SO4 catalyst in alkyla-tion is kept between 90-98%, because H2SO4 having concentration
37288. High aniline point of a petrofuel (say diesel) indicates that
37289. Which of the following reactions is undesirable in the production of catalytically reformed gasoline ?
37290. Good quality kerosene should have
37291. The most suitable solvent for deasphalting vacuum residue is
37292. Paraffins are desirable in lubricating oil, as it has got high
37293. Cetane number of a diesel fuel is the measure of its
37294. Maximum viscosity of tar/PCM/fuel oil for easy and efficient atomisation in conventional burner is __________ centistokes (or 100 Redwood I seconds).
37295. Thermofer catalytic cracking process is a __________ process.
37296. 1 centistoke is equal to __________ Redwood I seconds.
37297. 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
37298. Which is the most ideal feed stock for 'coking' process used for the manufacture of petroleum coke ?
37299. Which of the following gasolines (unleaded) has the least octane number ?
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