Petro QB Unit 1 - chemical engging PDF

Preview

Summary

chemical engging...

Description

PETROLEUM REFINING QUESTION BANK (UNIT 1) 1. The first crude oil refinery of India is located at Naharkatiya

Digboi

Kochi

Madras

2. CnH2n is the general formula for Olefins Naphthenes

Both (A) and (B)

3. The general formula of naphthenes is CnH2n + 2 CnHn-4

CnH2n-6 (where, n ≥ 6) Same as that for olifins i.e. CnH2n

Neither (A) nor (B)

4. 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. Unsaturated hydrocarbon content Calorific value Quantity of propane Quality of butane 5. LPG stands for Liquid petroleum gas Liquid petrol gas

Liquefied petrol gas Liquefied petroleum gas

6. Molecular weight of crude petroleum may be around 50 250 1500 5000 7. Which is almost absent in crude petroleum? Olefins Mercaptans Naphthenes Cycloparaffins 8. LPG when brought to atmospheric pressure & temperature will be a Liquid lighter than water Liquid heavier than water Gas lighter than air Gas heavier than air 9. Feedstock for the production of biodiesel is herbal plants LSHS (low sulphur heavy stock)

used vegetable oils Bagasse

10. Hydrogen percentage (by weight) in crude petroleum may be about 5 15 25 35 11. Liquefied Petroleum Gas (LPG) is mainly a mixture of Propane & butane

Methane & ethane

High boiling olefins

High boiling naphthenes

12. Presence of aromatics in Diesel increases its cetane number

Kerosene increases its smoke point

Petrol increases its octane number

All (a), (b) and (c)

13. Which method is used for distilling high-boiling fractions of petroleum crude? Atmospheric distillation

Vacuum distillation

Thermal cracking

Coking

14. Which of the hydrocarbon are the most desirable in kerosene? Paraffins

Isoparaffins

Naphthenes

Aromatic

15. The viscosity of a hydrocarbon liquids Remain unaffected with change in density Decreases with increase in density Increases with increase in density None of the above 16. Crude oil is in the form of ____________ emulsion of oil and brine emulsion of oil and impurities emulsion of brine and impurities emulsion of impurities and moisture 17. It is necessary to mention the temperature at which specific gravity is calculated, because Mass of the substance changes with temperature Rigidity of the substance changes with temperature Density of the substance changes with temperature None of the mentioned 18. Crude oil is transported inland from oil field to refineries, mainly by the Road tankers Rail tankers Underground pipelines None of these 19. The yield of straight run LPG from crude oil is about __________ weight percent. 20-25 1-1.5 10-15 0.1-0.2 20. Petroleum deposits are detected by the. Oil seepage at the surface of the earth Measurement of density, elasticity and magnetic & electric properties of the rock in the crust of the earth Age & nature of rocks inside the crust of the earth All (a), (b) and (c) 21. Stabilization of gasoline (petrol) means Removal of dissolved gases from it Increasing its oxidation stability Improving its lead susceptibility Increasing its vapor pressure

22. With increase in density, the viscosity of petroleum products Increases Decreases Remain same Either (a) or (b) 23. __________ converts n-paraffins to i-paraffins Alkylation Polymerization Isomerization

None of these

24. Specific gravity of a petroleum product gives an indication of its Degree of refinement Hydrocarbon content type (aromatic or paraffinic) Ease of atomization Sulphur content 25. A good lubricant should have high Viscosity index Pour point

Volatility None of these

26. Gasoline yield in catalytic reforming of naphtha may be about ______ percent by weight 85 65 50 98

27. Percentage of straight run gasoline in a typical crude oil may be around 6 18 38 52

28. Which of the following is desirable in petrol(gasoline) but undesirable in kerosene? Paraffins Aromatics Mercaptans Naphthenic acid 29. Main constituent of natural gas is CH4 C2H2 C2H4

C2H6

30. Hydrogen percentage (by weight) in crude petroleum may be about 5 15 25 35

31. With increase in the number of carbon and hydrogen atoms in hydrocarbon molecules, the density of petroleum products Decreases Increases Remains same Unpredictable from data 32. Which of the following has the lowest cetane number? Aromatics i-paraffins Naphthene Olefins 33. Which is the most undesirable component in kerosene? Paraffins Isoparaffins Naphthenes Aromatics

34. Good quality kerosene should have Low smoke point High aromatics content

High smoke point Low paraffins content

35. Cetane number of a diesel fuel is the measure of its Ignition delay Smoke point Viscosity Oxidation stability 36. The proper arrangement of the petroleum fractions in order of their boiling points is lubricating oil > diesel > petrol > LPG lubricating oil > petrol > diesel > LPG petrol > lubricating oil > diesel > LPG petrol > diesel > LPG > lubricating oil 37. The condensate obtained on compression of wet natural gas is termed as Liquefied natural gasoline Natural gasoline Liquid natural gas None of these...