*/*_Concentration of H‚Äö√á√áSO‚Äö√á√ë catalyst in alkyla-tion is kept between 90-98%, because H‚Äö√á√áSO‚Äö√á√ë having concentration?

Less than 90% promotes polymerisation

More than 98% promotes cracking

*/*_Dearomatisation of kerosene (by liquid sulphur dioxide extraction) is done to?

Improve its oxidation stability

*/*_Feed for reforming is generally?

Naphtha or straight run gasoline

*/*_Pick out the undesirable property for a solvent meant for dewaxing of lube oil.?

High solubility of wax in the solvent

*/*_Detergent is added as an additive in engine lubricating oil to?

Keep contaminants in suspension

*/*_Casing head gasoline is the liquid?

Gasoline separated from wet natural gas by compression

*/*_Catalyst used in catalytic polymerisation which produces polymer gasoline is?

H‚Äö√á√áSO‚Äö√á√ë

H‚Äö√á√âPO‚Äö√á√ë

%_Pick out the correct statement about catalytic polymerisation._%

H‚Äö√á√áSO‚Äö√á√ë polymerisation process gives gasoline rich in unsaturates

In H‚Äö√á√áSO‚Äö√á√ë polymerisation, H‚Äö√á√âPO‚Äö√á√ë is always used with 2% steam to prevent meta & ortho H‚Äö√á√âPO‚Äö√á√ë formation, which are inactive

%_Choose the correct statement._%

The aromatics have lower octane number than naphthenes with same number of carbon atoms

Octane number of i-octane is zero

Octane number of paraffins increases with increasing number of carbon atoms

Branched chain paraffins have higher octane number than straight chain paraffins with same number of carbon atoms

The aromatics have lower octane number than naphthenes with same number of carbon atoms

%_Choose the correct statement regarding thermal cracking._%

Moderate changes in operating temperature does not change the depth of cracking

Increased residence time results in the decreased severity of cracking

At low pressure, the yield of lighter hydrocarbons are more

Greater depth of cracking gives lower octane number gasoline

%_Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene._%

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

Smoking tendency of hydrocarbons increases in the order : paraffins ‚Äö√ú√≠ isoparaffins ‚Äö√ú√≠ naphthenes ‚Äö√ú√≠ 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

Smoking tendency of aromatics decreases with increase in its molecular weight

%_LSHS is a type of furnace oil, which_%

Is more viscous than high viscosity furnace oil (HVFO)

Stands for low sulphur heavy stock

Is an ideal fuel for metallurgical furnaces due to its lower sulphur content (< 1%)

_ Flash point of atmospheric distillation residue is determined by __________ apparates.$?

Pensky-Martens (closed cup type)

_ Sulphur content in lighter and heavier petroleum products is generally determined respectively by$?

Bomb method and quartz tube method

Quartz tube method and lamp method

_ In catalytic cracking, the$?

Gasoline obtained has very high amount of gum forming compounds

Gasoline obtained has a very low octane number

Pressure & temperature is very high

Gasoline obtained has very high aromatic content

Gasoline obtained has very high amount of gum forming compounds

281 + Mcqs in Petroleum Refinery Engineering in Chemical Engineering Page 2 McqOptions

51.	/_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.?
A.	1
B.	50
C.	5000
D.	10000
Answer» C. 5000

52.	/_Electrical desalting of crude oil removes the __________ impurities.?
A.	Oleophilic
B.	Oleophobic
C.	Both A & B
D.	Neither A nor B
Answer» C. Both A & B

54.	/_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?
A.	Molecular weight
B.	Aromatics content
C.	Both A & B
D.	Neither A nor B
Answer» D. Neither A nor B

55.	/_The coking process normally mostly used in Indian oil refineries is the __________ coking process.?
A.	Delayed
B.	Flexi
C.	Fluid
D.	Contact
Answer» B. Flexi

56.	/_H/C ratio (by weight) for the same number of carbon atoms is the highest in case of?
A.	Aromatics
B.	Paraffins
C.	Olefins
D.	Naphthenes
Answer» E.

57.	/_In a refinery petroleum crude is fractionated into gas fraction, light ends, intermediate distillates, heavy distillates, residues and by products. The group of products including gas oil, diesel oil and heavy fuel oil belongs to the fraction?
A.	Heavy distillates
B.	Intermediate distillates
C.	Light ends
D.	Residues
Answer» B. Intermediate distillates

58.	/_Dearomatisation of kerosene (by liquid sulphur dioxide extraction) is done to?
A.	Increase its smoke point
B.	Improve its oxidation stability
C.	Decrease the breathing loss
D.	None of these
Answer» C. Decrease the breathing loss

59.	/_The most suitable solvent for deasphalting vacuum residue is?
A.	Propane
B.	Methyl ethyl ketone
C.	Doctor's solution
D.	Methanol amine
Answer» C. Doctor's solution

60.	/_Naphthenic acid is a/an __________ compound.?
A.	Sulphur
B.	Nitrogen
C.	Oxygen
D.	None of these
Answer» D. None of these

61.	/_Feed for reforming is generally?
A.	Naphtha or straight run gasoline
B.	Reduced crude
C.	Vacuum gas oil
D.	Atmospheric gas oil
Answer» B. Reduced crude

62.	/_Pick out the undesirable property for a solvent meant for dewaxing of lube oil.?
A.	Complete miscibility with oil
B.	High solubility of wax in the solvent
C.	Both A & B
D.	Neither A nor B
Answer» D. Neither A nor B

66.	/_Boiling range of motor gasoline is an indication of the?
A.	Case of starting
B.	Rate of acceleration
C.	Vapour locking tendency
D.	All of the above
Answer» C. Vapour locking tendency

67.	/_Aromatics are desired constituents of?
A.	Lubricating oil
B.	Diesel
C.	Kerosene
D.	Petrol
Answer» E.

74.	%_Thermofer catalytic cracking process is a __________ process._%
A.	Fixed bed
B.	Moving bed
C.	Fluidised bed
D.	Non-catalytic
Answer» E.

75.	%_Flash point of an oil is determined by the_%
A.	Pensky Martens apparatus
B.	Ramsbottom apparatus
C.	Saybolt viscometer
D.	Conradson apparatus
Answer» B. Ramsbottom apparatus

63.	/_Detergent is added as an additive in engine lubricating oil to?
A.	Reduce deposit formation
B.	Keep contaminants in suspension
C.	Increase oxidation stability
D.	Prevent rusting
Answer» B. Keep contaminants in suspension

64.	/_Most widely used solvent for dewaxing is?
A.	Methyl-ethyl-ketone (MEK)
B.	Naphtha
C.	Petroleum ether
D.	Sodium plumbite
Answer» B. Naphtha

65.	/_Casing head gasoline is the liquid?
A.	Butane
B.	Propane
C.	Natural gas
D.	Gasoline separated from wet natural gas by compression
Answer» B. Propane

70.	%_Gasoline extracted from natural gas (by compression and cooling) is called the __________ gasoline._%
A.	Polymer
B.	Unleaded
C.	Casing head
D.	Straight run
Answer» C. Casing head

72.	%_Extractor temperature is maintained at -20¬¨‚àûC in Edeleanu process to reduce the __________ of kerosene._%
A.	Smoke point
B.	Paraffins
C.	Aromatics
D.	Naphthenes
Answer» C. Aromatics

76.	%_Mercapsol and Unisol processes are meant for the_%
A.	Dearomatisation of kerosene
B.	Removal of mercaptans
C.	Dewaxing
D.	Decoloration
Answer» C. Dewaxing

77.	%_Deoiling is the process of removal of oil from wax. It is done by the __________ process._%
A.	Solvent extraction
B.	Sweating
C.	Resettling
D.	All of the above
Answer» E.

78.	%_Sulphuric acid treatment of petroleum products removes the __________ materials._%
A.	Gum forming
B.	Color forming
C.	Asphaltic
D.	All of the above
Answer» E.

79.	%_Petroleum_%
A.	Is optically active
B.	Constitutes mainly of olefins
C.	Does not contain asphalt
D.	Does not contain aromatics
Answer» B. Constitutes mainly of olefins

80.	%_Higher vapour pressure of gasoline indicates_%
A.	Low flash point
B.	High breathing loss
C.	Both A & B
D.	Neither A nor B
Answer» E.

Explore topic-wise MCQs in Chemical Engineering.

*/*_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.?

*/*_Electrical desalting of crude oil removes the __________ impurities.?

*/*_Concentration of H‚Äö√á√áSO‚Äö√á√ë catalyst in alkyla-tion is kept between 90-98%, because H‚Äö√á√áSO‚Äö√á√ë having concentration?

*/*_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?

*/*_The coking process normally mostly used in Indian oil refineries is the __________ coking process.?

*/*_H/C ratio (by weight) for the same number of carbon atoms is the highest in case of?

*/*_In a refinery petroleum crude is fractionated into gas fraction, light ends, intermediate distillates, heavy distillates, residues and by products. The group of products including gas oil, diesel oil and heavy fuel oil belongs to the fraction?

*/*_Dearomatisation of kerosene (by liquid sulphur dioxide extraction) is done to?

*/*_The most suitable solvent for deasphalting vacuum residue is?

*/*_Naphthenic acid is a/an __________ compound.?

*/*_Feed for reforming is generally?

*/*_Pick out the undesirable property for a solvent meant for dewaxing of lube oil.?

*/*_Detergent is added as an additive in engine lubricating oil to?

*/*_Most widely used solvent for dewaxing is?

*/*_Casing head gasoline is the liquid?

*/*_Boiling range of motor gasoline is an indication of the?

*/*_Aromatics are desired constituents of?

*/*_Catalyst used in catalytic polymerisation which produces polymer gasoline is?

%_Pick out the correct statement about catalytic polymerisation._%

%_Gasoline extracted from natural gas (by compression and cooling) is called the __________ gasoline._%

%_Choose the correct statement._%

%_Extractor temperature is maintained at -20¬¨‚àûC in Edeleanu process to reduce the __________ of kerosene._%

%_Choose the correct statement regarding thermal cracking._%

%_Thermofer catalytic cracking process is a __________ process._%

%_Flash point of an oil is determined by the_%

%_Mercapsol and Unisol processes are meant for the_%

%_Deoiling is the process of removal of oil from wax. It is done by the __________ process._%

%_Sulphuric acid treatment of petroleum products removes the __________ materials._%

%_Petroleum_%

%_Higher vapour pressure of gasoline indicates_%

%_Gasoline yield in catalytic reforming of naphtha may be about __________ percent by weight._%

%_Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene._%

%_The most widely used crude topping column in refineries is the __________ column._%

%_Reforming converts_%

%_Crude oil is pumped by a __________ pump._%

%_LSHS is a type of furnace oil, which_%

_ The main reaction in reforming is the$?

_ Sweetening of petroleum product means the removal of$?

_ Flash point of atmospheric distillation residue is determined by __________ apparates.$?

_ Sulphur content in lighter and heavier petroleum products is generally determined respectively by$?

_ Pick out the additive property of a lube oil out of following.$?

_ Illuminating characteristics of kerosene is expressed by its$?

_ Phenols are added in gasoline to$?

_ Which of the following is not an important property of fuel oil/furnace oil?$?

_ Which of the following has the highest gum forming tendency in gosoline?$?

_ In catalytic cracking, the$?

_ Catalyst used in the catalytic polymerisation is$?

_ The most commonly used feed stock for the reforming reactor is$?

_ Cetane number of alpha methyl naphthalene is assumed to be$?

_ Which of the following contains maximum sulphur?$?

/_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.?

/_Electrical desalting of crude oil removes the __________ impurities.?

/_Concentration of H‚Äö√á√áSO‚Äö√á√ë catalyst in alkyla-tion is kept between 90-98%, because H‚Äö√á√áSO‚Äö√á√ë having concentration?

/_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?

/_The coking process normally mostly used in Indian oil refineries is the __________ coking process.?

/_H/C ratio (by weight) for the same number of carbon atoms is the highest in case of?

/_In a refinery petroleum crude is fractionated into gas fraction, light ends, intermediate distillates, heavy distillates, residues and by products. The group of products including gas oil, diesel oil and heavy fuel oil belongs to the fraction?

/_Dearomatisation of kerosene (by liquid sulphur dioxide extraction) is done to?

/_The most suitable solvent for deasphalting vacuum residue is?

/_Naphthenic acid is a/an __________ compound.?

/_Feed for reforming is generally?

/_Pick out the undesirable property for a solvent meant for dewaxing of lube oil.?

/_Detergent is added as an additive in engine lubricating oil to?

/_Most widely used solvent for dewaxing is?

/_Casing head gasoline is the liquid?

/_Boiling range of motor gasoline is an indication of the?

/_Aromatics are desired constituents of?

/_Catalyst used in catalytic polymerisation which produces polymer gasoline is?

81.	%_Gasoline yield in catalytic reforming of naphtha may be about __________ percent by weight._%
A.	85
B.	65
C.	50
D.	98
Answer» B. 65

83.	%_The most widely used crude topping column in refineries is the __________ column._%
A.	Bubble-cap
B.	Packed bed
C.	Fluidised bed
D.	Perforated plate
Answer» B. Packed bed

84.	%_Reforming converts_%
A.	Olefins into paraffins
B.	Naphthenes into aromatics
C.	Naphthenes into olefins
D.	Naphthenes into paraffin
Answer» C. Naphthenes into olefins

85.	%_Crude oil is pumped by a __________ pump._%
A.	Gear
B.	Centrifugal
C.	Screw
D.	Reciprocating
Answer» C. Screw

87.	_ The main reaction in reforming is the$?
A.	Dehydrogenation of naphthenes
B.	Hydrogenation of naphthenes
C.	Hydrocracking of paraffins
D.	Saturation of olefins
Answer» B. Hydrogenation of naphthenes

88.	_ Sweetening of petroleum product means the removal of$?
A.	Sulphur & its compounds
B.	Water
C.	Organic impurities
D.	Wax
Answer» B. Water

89.	_ Flash point of atmospheric distillation residue is determined by __________ apparates.$?
A.	Pensky-Martens (closed cup type)
B.	Abel
C.	Cleveland (open cup type)
D.	None of these
Answer» D. None of these

90.	_ Sulphur content in lighter and heavier petroleum products is generally determined respectively by$?
A.	Lamp method and bomb method
B.	Bomb method and lamp method
C.	Bomb method and quartz tube method
D.	Quartz tube method and lamp method
Answer» C. Bomb method and quartz tube method

91.	_ Pick out the additive property of a lube oil out of following.$?
A.	¬¨‚àûAPI gravity
B.	Specific gravity
C.	Viscosity
D.	Flashpoint
Answer» B. Specific gravity

92.	_ Illuminating characteristics of kerosene is expressed by its$?
A.	Smoke point
B.	Aniline point
C.	Luminosity number
D.	Aromatic content
Answer» D. Aromatic content