The terminology used for the bottom most product from the vacuum crude distillation unit is (A) Residual crude (B) Residuum (C) Reduced crude (D) Petrolatum

The terminology used for the bottom most product from the vacuum
crude distillation unit is
(A) Residual crude
(B) Residuum
(C) Reduced crude
(D) Petrolatum
by

1 Answer

Answer :

(B) Residuum
by

Related questions

Bottom product of atmospheric pressure crude oil distillation column is termed as (A) Reduced crude (B) Heavy ends (C) Asphalt (D) Residuum

Description : Bottom product of atmospheric pressure crude oil distillation column is termed as (A) Reduced crude (B) Heavy ends (C) Asphalt (D) Residuum

Last Answer : (A) Reduced crude

The vacuum maintained in vacuum distillation unit for reduced crude is about __________ mm Hg. (A) 1.2 (B) 12 (C) 120 (D) 700

Description : The vacuum maintained in vacuum distillation unit for reduced crude is about __________ mm Hg. (A) 1.2 (B) 12 (C) 120 (D) 700

Last Answer : (C) 120

Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil (A) Gives higher yield of petrol (B) Lower octane number of petrol (C) Higher sulphur content in the product (D) Higher gum forming material in petro

Description : Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil (A) Gives higher yield of petrol (B) Lower octane number of petrol (C) Higher sulphur content in the product (D) Higher gum forming material in petro

Last Answer : (A) Gives higher yield of petrol

Crude oil is subjected to vacuum distillation in the last stage, because (A) High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose (B) Lighter/low boiling products are prone to thermal decomposition (C) High purity products can be obtained thereby (D) None of these

Description : Crude oil is subjected to vacuum distillation in the last stage, because (A) High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose (B) Lighter/low ... prone to thermal decomposition (C) High purity products can be obtained thereby (D) None of these

Last Answer : (A) High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose

Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about __________ mm Hg (absolute). (A) 5-10 (B) 30-80 (C) 150-250 (D) 350-400

Description : Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about __________ mm Hg (absolute). (A) 5-10 (B) 30-80 (C) 150-250 (D) 350-400

Last Answer : (B) 30-80

Products drawn from the top to bottom of the crude oil distillation column has progressively increasing (A) Boiling points (B) Molecular weight (C) C/H ratio (D) All (A), (B) and (C)

Description : Products drawn from the top to bottom of the crude oil distillation column has progressively increasing (A) Boiling points (B) Molecular weight (C) C/H ratio (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Feed for reforming is generally (A) Naphtha or straight run gasoline (B) Reduced crude (C) Vacuum gas oil

Description : Feed for reforming is generally (A) Naphtha or straight run gasoline (B) Reduced crude (C) Vacuum gas oil

Last Answer : (A) Naphtha or straight run gasoline

Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because (A) Its calorific value is very less (B) Tar neutralises the residual acids present in pitch (C) It reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop (D) All (A), (B) and (C)

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Last Answer : (C) It reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop

The terminology 'BTX' used in coal tar distillation industry refers to (A) Benzol-toluol-xylol (B) Benzol-toluene-xylene (C) Benzene-toluol-xylol (D) Benzene-toluene-xylene

Description : The terminology 'BTX' used in coal tar distillation industry refers to (A) Benzol-toluol-xylol (B) Benzol-toluene-xylene (C) Benzene-toluol-xylol (D) Benzene-toluene-xylene

Last Answer : (D) Benzene-toluene-xylene

The main use of heavy gas oil produced by the vacuum distillation unit is as a (A) Blending component for kerosene (B) Blending component for petrol (C) Feedstock for fluid catalytic cracking unit (D) None of these

Description : The main use of heavy gas oil produced by the vacuum distillation unit is as a (A) Blending component for kerosene (B) Blending component for petrol (C) Feedstock for fluid catalytic cracking unit (D) None of these

Last Answer : (C) Feedstock for fluid catalytic cracking unit

In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be (A) At ground level (B) 2 metres above the ground (C) 5 metres above ground (D) 10 metres above ground

Description : In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be ... metres above the ground (C) 5 metres above ground (D) 10 metres above ground

Last Answer : (A) At ground level

Pressure maintained in the high pressure primary tower of a three stage crude oil distillation system is about __________ kg/cm2 . (A) 1.5 (B) 3 (C) 6 (D) 12

Description : Pressure maintained in the high pressure primary tower of a three stage crude oil distillation system is about __________ kg/cm2 . (A) 1.5 (B) 3 (C) 6 (D) 12

Last Answer : (B) 3

In the atmospheric pressure crude distillation, the content of __________ from lighter fraction to heavier ones. (A) Sulphur increases (B) Sulphur decreases (C) Nitrogen decreases (D) None of these

Description : In the atmospheric pressure crude distillation, the content of __________ from lighter fraction to heavier ones. (A) Sulphur increases (B) Sulphur decreases (C) Nitrogen decreases (D) None of these

Last Answer : (A) Sulphur increases

Naphtha yield in straight run distillation of crude oil may be about__________ percent.(A) 2(B) 6(C) 12(D) 18

Description : Naphtha yield in straight run distillation of crude oil may be about__________ percent. (A) 2 (B) 6 (C) 12 (D) 18

Last Answer : (B) 6

A typical yield of kerosene in straight run distillation of crude oil may be about __________ percent. (A) 4 (B) 10 (C) 18 (D) 26

Description : A typical yield of kerosene in straight run distillation of crude oil may be about __________ percent. (A) 4 (B) 10 (C) 18 (D) 26

Last Answer : (B) 10

A typical yield of diesel in straight run distillation of crude oil may be about __________ percent. (A) 8 (B) 18 (C) 28 (D) 35

Description : A typical yield of diesel in straight run distillation of crude oil may be about __________ percent. (A) 8 (B) 18 (C) 28 (D) 35

Last Answer : (A) 8

__________ chloride present in crude petroleum as impurity is the most prolific producer of HCl during distillation. (A) Magnesium (B) Potassium (C) Calcium (D) Sodium

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Last Answer : (A) Magnesium

Flash distillation is (A) Same as differential distillation (B) Used for multi-component systems like crude refining (C) Same as simple distillation (D) Most useful for handling binary systems

Description : Flash distillation is (A) Same as differential distillation (B) Used for multi-component systems like crude refining (C) Same as simple distillation (D) Most useful for handling binary systems

Last Answer : (B) Used for multi-component systems like crude refining

Light oil whose major component is Benzol, is obtained by the distillation of crude tar in the temperature range of __________ °C. (A) 80-170 (B) 200-300 (C) 250-270

Description : Light oil whose major component is Benzol, is obtained by the distillation of crude tar in the temperature range of __________ °C. (A) 80-170 (B) 200-300 (C) 250-270

Last Answer : (A) 80-170

Pick out the wrong statement. (A) LPG is also used as fuel for automobiles & small furnaces and for cutting & welding of metals (B) The minimum temperature, at which a petroleum oil vapor catches fire and continues to burn, is called its flash point (C) Each ton of petroleum oil on distillation produces about 30-50 Nm3 of gas (D) Maximum yield of naphthalene is obtained on distillation of crude oil

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The most commonly used feed stock for the reforming reactor is (A) Heavy fuel oil (B) Residuum (C) Straight run gasoline (D) Casing head gasoline

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Petrolatum is (A) Same as petroleum ether (B) Petroleum coke (C) A mixture of microcrystalline wax in viscous hydrocarbon liquids (D) None of these

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Last Answer : (C) A mixture of microcrystalline wax in viscous hydrocarbon liquids

. The main aim of cracking is to produce (A) Gasoline (B) Lube oil (C) Petrolatum (D) Coke

Description : . The main aim of cracking is to produce (A) Gasoline (B) Lube oil (C) Petrolatum (D) Coke

Last Answer : (A) Gasoline

The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by (A) Raising the temperature (B) Lowering the total pressure (C) Both (A) and (B) (D) Neither (A) nor (B)

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Last Answer : (C) Both (A) and (B

Pick out the wrong statement. (A) With decrease in feed temperature, the number of plates required for binary distillation decreases for a given ‘L/V’ ratio (B) The extraction per unit of total height for a short packed column is more effective than for a tall column, in case of liquid-liquid extraction(C) Natural draft cooling towers are made of ferroconcrete and its cross￾section is wider at the bottom(D) Vander wall adsorption is also called chemisorption

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A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state, (A) Composition of vapors and that of liquid do not vary throughout the column (B) Reboiler load and condenser load are minimum (C) The top and bottom compositions are unchanged with and without total reflux (D) The top and bottom compositions correspond to the maximum enrichment available

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Consider the following statements: 1. Carbyne is an allotrope of carbon. 2. Gasoline, used as a fuel in motor vehicles is a mixture of petrol and alcohol. 3. Petroleum is also known as 'liquid gold'. 4. The various components of crude oil are separated by fractional distillation. The correct statements are: (a) 1, 2 and 4 only (b) 1, 3 and 4 only (c) 1, 2, 3 and 4 (d) 1, 2 and 3 only

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Consider the following processes: 1. Evaporation 2. Fractional distillation 3. Distillation 4. Filtration The process(es) involved in the refining of crude oil is/ are: (a) 3 only (b) 2 and 3 (c) 3 only (d) 1 only

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Crude oil is separated into its components by: w) chemical reaction x) simple distillation y) fractional distillation z) settling

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Which of the following fractions of a crude oil will have the maximum gravity API (i.e. °API)? (A) Diesel (B) Gasoline (C) Atmospheric gas oil (D) Vacuum gas oil

Description : Which of the following fractions of a crude oil will have the maximum gravity API (i.e. °API)? (A) Diesel (B) Gasoline (C) Atmospheric gas oil (D) Vacuum gas oil

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Presence of H2S in raw water (to be chlorinated) results in the (A) Reduced softening capacity of zeolite (B) Increased dosage of chlorine to provide a disinfecting residual in the water (C) Easy removal of its hardness (D) None of these

Description : Presence of H2S in raw water (to be chlorinated) results in the (A) Reduced softening capacity of zeolite (B) Increased dosage of chlorine to provide a disinfecting residual in the water (C) Easy removal of its hardness (D) None of these

Last Answer : (B) Increased dosage of chlorine to provide a disinfecting residual in the water

Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about __________ mm Hg absolute. (A) 1 to 5 (B) 30 to 80

Description : Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about __________ mm Hg absolute. (A) 1 to 5 (B) 30 to 80

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Water-ethyl alcohol solution can be concentrated (in respect of alcohol concentration) by __________ distillation. (A) Atmospheric (B) Vacuum (C) High pressure (D) None of these

Description : Water-ethyl alcohol solution can be concentrated (in respect of alcohol concentration) by __________ distillation. (A) Atmospheric (B) Vacuum (C) High pressure (D) None of these

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Pick out the wrong statement. (A) Critical moisture content is not a property of the material itself (B) A sharp increase in pressure drop gives an indication of the flooding in a distillation column (C) Separation of components is not possible in liquid extraction, if selectivity is unity (D) Dehydration of ethyl alcohol is most economically done by molecular distillation at very high vacuum

Description : Pick out the wrong statement. (A) Critical moisture content is not a property of the material itself (B) A sharp increase in pressure drop gives an indication of the flooding in a ... unity (D) Dehydration of ethyl alcohol is most economically done by molecular distillation at very high vacuum

Last Answer : (D) Dehydration of ethyl alcohol is most economically done by molecular distillation at very high vacuum

Out of two equilibrium curves, first one lies above the diagonal and the second lies below the diagonal in the x-y plot. It means that separation by distillation is(A) Not possible in the second case unless vacuum is applied(B) Not possible in the second case unless high pressure is applied(C) More readily done in the second case compared to first one(D) None of these

Description : Out of two equilibrium curves, first one lies above the diagonal and the second lies below the diagonal in the x-y plot. It means that separation by distillation is (A) Not possible in the second ... (C) More readily done in the second case compared to first one (D) None of these

Last Answer : (C) More readily done in the second case compared to first one

Use of packed towers for distillation is generally limited to the (A) Small sizes (B) Multi-component distillation (C) High pressure operation (D) Vacuum distillation

Description : Use of packed towers for distillation is generally limited to the (A) Small sizes (B) Multi-component distillation (C) High pressure operation (D) Vacuum distillation

Last Answer : (A) Small sizes

Concentration of hydrogen peroxide is done by(A) Crystallisation(B) Vacuum crystallisation(C) Atmospheric distillation(D) Dehydration

Description : Concentration of hydrogen peroxide is done by (A) Crystallisation (B) Vacuum crystallisation (C) Atmospheric distillation (D) Dehydration

Last Answer : (B) Vacuum crystallisation

Glycerine is recovered from lye by (A) Evaporation followed by vacuum distillation (B) Liquid extraction technique (C) Extractive distillation technique (D) None of these

Description : Glycerine is recovered from lye by (A) Evaporation followed by vacuum distillation (B) Liquid extraction technique (C) Extractive distillation technique (D) None of these

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Plate efficiency in a distillation column is reduced due to the __________ of liquid. (A) Entrainment (B) Foaming (C) Weeping & dumping (D) All (A), (B) & (C)

Description : Plate efficiency in a distillation column is reduced due to the __________ of liquid. (A) Entrainment (B) Foaming (C) Weeping & dumping (D) All (A), (B) & (C)

Last Answer : (D) All (A), (B) & (C)

Inside the distillation column, the (A) Driving force for the vapour flow is the pressure drop (B) Liquids are not always at their bubble points (C) Pressure increases gradually from bottom to the top of the column (D) None of these

Description : Inside the distillation column, the (A) Driving force for the vapour flow is the pressure drop (B) Liquids are not always at their bubble points (C) Pressure increases gradually from bottom to the top of the column (D) None of these

Last Answer : (A) Driving force for the vapour flow is the pressure drop

In an operating distillation column, the (A) Vapors and liquids are at their dew point and bubble point respectively (B) Driving force for the liquid flow is its specific weight (C) Driving force for the vapor flow is the pressure drop, as the pressure decreases gradually from the bottom to the top of the column (D) Highest temperature is encountered at the top of the column

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Description : High pressure at the bottom of a distillation tower handling heat sensitive materials results in (A) Thermal decomposition of bottoms (B) Increased relative volatility (C) Erosion of the tower (D) Very efficient operation

Last Answer : (A) Thermal decomposition of bottoms

According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a bottom fraction containing 98 mol% B ? Assume that relative volatility (αAB = 2) does not change appreciably in the column. (A) 5 (B) 9 (C) 12 (D) 28

Description : According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a ... in the column. (A) 5 (B) 9 (C) 12 (D) 28

Last Answer : (C) 12

Distillation at reduced pressure is used for liquids which (a) Have high boiling points (b) Have low boiling points (c) Have high volatility (d) Decompose before their boiling points

Description : Distillation at reduced pressure is used for liquids which (a) Have high boiling points (b) Have low boiling points (c) Have high volatility (d) Decompose before their boiling points

Last Answer : Ans:(d)

Pick out the wrong statement. (A) A pale color of petroleum product indicates lower viscosity (B) Color of petroleum products indicates the degree of refinement (C) Lighter petroleum distillates are lighter in color than the heavier residual oils (D) Fluorescence of oils helps to detect its adulteration

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Is there any way to remove residual product left in pipes after a batch operation?

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A vacuum cleaner works on the principle of pressure difference. On the moon it will – (1) work as efficiently as on the earth (2) not work at all (3) work with reduced efficiency (4) work with increased efficiency

Description : A vacuum cleaner works on the principle of pressure difference. On the moon it will – (1) work as efficiently as on the earth (2) not work at all (3) work with reduced efficiency (4) work with increased efficiency

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A vacuum cleaner works on the principle of pressure difference. On the moon it will (1) work as efficiently as on the earth (2) not work at all (3) work with reduced efficiency (4) work with increased efficiency

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For which of the following unit operations, Lewis number is ofsignificance?(A) Adsorption(B) Binary distillation(C) Gas absorption(D) Humidification

Description : For which of the following unit operations, Lewis number is ofsignificance? (A) Adsorption (B) Binary distillation (C) Gas absorption (D) Humidification

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Which of the following unit operations makes use of Thiele-Geddes equation? (A) Liquid-liquid extraction (B) Solid-liquid extraction (C) Multi-component absorption with chemical reaction (D) Multi-component distillation

Description : Which of the following unit operations makes use of Thiele-Geddes equation? (A) Liquid-liquid extraction (B) Solid-liquid extraction (C) Multi-component absorption with chemical reaction (D) Multi-component distillation

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