Petroleum Refinery Engineering Quiz 4

1 / 50

Pick out the additive property of lube oil out of following ?

Flashpoint

Specific gravity

Viscosity

?API gravity

2 / 50

Operating condition in the electrical dehydrators for crude oil is about______?

6.5 kgf/Cm2 & 95?C

50 atm. and 150?C

1 atm. & 110 ?C

20 kgf/cm2 & 110?C

3 / 50

Reforming___________?

Improves the quality & yield of gasoline

Does not much affect the molecular weight of the feed

All A., B. and C.

Uses naphtha as feedstock

4 / 50

Pick out the correct statement?

Suitability of kerosene as a fuel & as an illuminant may be determined by char value test

Aviation fuel should have very high cloud point

Paraffins have lower smoke point than aromatics

Paraffins have higher octane number than corresponding iso-paraffin

5 / 50

Performance number of a liquid fuel is related to its ___________?

Wax content

Knocking tendency

Sulphur content

Spontaneous ignition temperature

6 / 50

Pick out the wrong statement?

High viscosity index means a large change in viscosity with change in temperature

Multigrade lubricating oils have high viscosity index

Paraffinic oil has very high viscosity index

Naphthenic oil has very low viscosity index

7 / 50

Pick out the wrong statement ?

Higher specific gravity of petroleum products means higher C/H ratio

Hydrocarbons of high specific gravity (e.g., aromatics) possess the maximum thermal energy per unit weight

Hydrocarbons of low specific gravity (e.g., paraffins) possess the maximum thermal energy per unit volume

Aromatics have lower specific gravity than corresponding paraffins

8 / 50

Pick out the wrong statement ?

Lighter petroleum distillates are lighter in color than the heavier residual oils

Color of petroleum products indicates the degree of refinement

Fluorescence of oils helps to detect its adulteration

A pale color of petroleum product indicates lower viscosity

9 / 50

Pour point of a petrofuel is_________?

5?C below the temperature at which oil ceases to flow

None of these

Multiple of 5?F

Multiple of 3?F

10 / 50

Paraffin base crude oil as compared to asphalt base crude gives_____?

Higher yield of straight run gasoline

Poorer yield of lube oil

Lower viscosity index lube oil

Higher octane number gasoline

11 / 50

Presence of aromatics in ___________?

All A., B. and C.

Diesel increases its cetane number

Kerosene increases its smoke point

Petrol increases its octane number

12 / 50

Reforming converts__________?

Naphthenes into paraffin

Olefins into paraffins

Naphthenes into aromatics

Naphthenes into olefins

13 / 50

Petroleum coke is used mainly in the ___________ ?

Blast furnace for reduction of iron ore

Discoloration of yellow glycerine

Sugar refining

Manufacture of carbon electrode

14 / 50

Pick out the correct statement about catalytic polymerisation ?

Both A. and B.

Neither A. nor B.

H2SO4 polymerisation process gives gasoline rich in unsaturates

In H2SO4 polymerisation, H3PO4 is always used with 2% steam to prevent meta & ortho H3PO4 formation, which are inactive

15 / 50

Pick out the wrong statement ?

Catalytic cracking is endothermic, but the regeneration of catalyst is exothermic

Rate of decomposition of olefins in catalytic cracking is slightly slower than the thermal cracking

None of these

Iso-paraffin crack faster than n-paraffin.

16 / 50

Pour point and freezing point is equal for___________?

Crude petroleum

Diesel

Water

Petrol

17 / 50

Olefins are__________?

Saturated hydrocarbons

None of these

Present in substantially good quantity in crude petroleum

Unsaturated cyclic compounds (hydrocarbons)

18 / 50

Pick out the wrong statement?

Lead susceptibility of petrol produced by catalytic process is more than that produced by thermal cracking

Higher temperature is employed in visbreaking than in thermal cracking

Pyrolysis is a mild thermal cracking process

Operating pressure and temperature in thermal cracking process is more than that in catalytic cracking process

19 / 50

Presence of predominantly large quantity of aromatics (polynuclear) is not desirable in aviation fuel, because it has___________?

High self-ignition temperature

High pour point and low smoke point

Low viscosity index

All A., B. and C.

20 / 50

Removal of light fractions from crude oil is called its _______?

Dehydration

Sweetening

Stabilisation

Visbreaking

21 / 50

Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about ________ ?C ?

140

22 / 50

Reid vapour pressure of gasoline is the measure of its__________?

Cloud point

Vapour locking tendency

Carbon residue

Pour point

23 / 50

Phenols are added in gasoline to______?

Improve the octane number

Increase its pour point

Reduce its viscosity

Act as an antioxidant

24 / 50

Products drawn from the top to bottom of the crude oil distillation column has progressively increasing _____?

All A., B. and C.

Molecular weight

C/H ratio

Boiling points

25 / 50

Older crude petroleum ___________?

Is light and better

Gives more distillates

All A., B. and C.

Gives less tar

26 / 50

Refractive index of a petrofuel which is the ratio of velocity of light in air to its velocity in the petrofuel gives an indication if its__________?

Molecular weight

Aromatics content

Neither ?a? nor ?b?

Both A. & B.

27 / 50

Percentage of straight run gasoline in a typical crude oil may be around_________?

28 / 50

Petrolatum is___________?

A mixture of microcrystalline wax in viscous hydrocarbon liquids

Same as petroleum ether

None of these

Petroleum coke

29 / 50

Pick out the correct statement pertaining to catalytic cracking ?

With increase in the reactor pressure, octane number of gasoline decreases

Percentage conversion increases with increase in the catalyst to oil ratio

All A., B. and C.

With increase in the reactor temperature, gasoline yield decreases for a given conversion

30 / 50

Research octane number refers to the_____?

Low octane number motor fuels

High octane number aviation fuels

Unleaded motor fuels

High octane number motor fuels

31 / 50

Quinoline is a/an _________ compound ?

None of these

Nitrogen

Sulphur

Oxygen

32 / 50

Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene ?

Smoking tendency of aromatics decreases with increase in its molecular weight

Smoking tendency of hydrocarbons increases in the order: paraffins ? isoparaffins ? naphthenes ? aromatics

Smoking tendency of paraffins increases with decrease in its molecular weight

Smoking tendency of naphthenes decreases with its increasing molecular weight & also on addition of double bond

33 / 50

Presence of sulphur in gasoline_____?

Helps during stabilisation

Leads to corrosion

Decreases gum formation

Increases lead susceptibility

34 / 50

Paraffins are desirable in lubricating oil, as it has got high_______?

Pour point

Smoke point

Viscosity index

Viscosity

35 / 50

Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatization by liquid SO2 extraction (Edeleanu process), its smoke point may become _________ mm?

100

36 / 50

Pressure maintained in the high pressure primary tower of a three stage crude oil distillation system is about _______ kg/cm2?

1.5

37 / 50

Pick out the undesirable property for a solvent meant for dewaxing of lube oil ?

Both A. and B.

Complete miscibility with oil

Neither A. nor B.

High solubility of wax in the solvent

38 / 50

Pressure & temperature maintained in catalytic cracking is about___________?

50 atm & 750?C

2 atm & 500?C

10 atm & 500?C

30 atm & 200?C

39 / 50

Petroleum is believed to have originated from ________ sources?

Both A. and B.

Neither A. nor B.

Animal

Vegetable

40 / 50

Petroleum _________ ?

Does not contain asphalt

Does not contain aromatics

Is optically active

Constitutes mainly of olefins

41 / 50

Platforming is a _____ process?

Moving bed

Fluidised bed

Non-regenerative & fixed bed

Regenerative

42 / 50

Pick out the wrong statement ?

All the alkylation processes use very high temperature (> 1000?C)

Catalytic alkylation processes use HF, AlCl3 & H2SO4 as Catalysts

Gasoline having an octane number of 90 can be produced by alkylation process

Alkylation produces a larger iso-paraffin (having higher octane number) from the reaction of an olefin with smaller iso-paraffin

43 / 50

Polymerisation___________?

Causes aromatics to combine with each other

Produces i-octane from cracked gases containing i-butane and butene

Is aimed at producing lubricating oil

Causes olefins to combine with each other

44 / 50

Operating temperature and pressure in catalytic reforming is about______?

15-45 Kgf/cm2 & 450-550?C

50 ? 75 kgf/cm2 & 600 ? 800?C

1-5 Kgf/cm2 & 200?C

5-10 kgf/cm2 & 150 ? 250?C

45 / 50

Pyrolysis of kerosene or natural gasoline is done to produce mainly the_____?

Diesel

Olefins and aromatics

Stabilised gasoline

Lighter paraffins

46 / 50

Pick out the wrong statement?

Gross calorific value (GCV) of petrofuels is equal to (12400 ? 2100 ?2) where, ? is the specific gravity of the fuel at 15.5?C

Aromatics have higher specific gravity than paraffins

Heavier petrofuels have higher GCV on weight basis (i.e., Kcal/kg) but lower GCV on volume basis (i.e., Kcal/litre)

Higher specific gravity of petrofuels means higher C/H ratio

47 / 50

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 ?

Petrol

Naphtha

Kerosene

Heavy fuel oil

48 / 50

Penetration test determines the ______ of the grease?

Lubricating properties (e.g. oilness)

Service temperature

Stiffness

Variation in viscosity with temperature

49 / 50

Pick out the wrong statement ?

Abel apparatus is used for determining flash points below 50?C

Characterisation factor of paraffinic crude oil is more than 12

An oil having high susceptibility to change in viscosity with temperature changes, has a high viscosity index

Pensky-Marten apparatus is used for determining flash points above 50?C

50 / 50

Octane numbers of motor gasoline used in India and America are respectively_________?

87 & 94

94 & 100

83 & 100

94 & 87

Provide Your Information

NameEmailPhone Number

Your score is

The average score is 0%