Which is the most ideal feed stock for 'coking' process used for the manufacture of petroleum coke? (A) Naphtha (B) Vacuum residue (C) Light gas oil (D) Diesel

Which is the most ideal feed stock for 'coking' process used for the
manufacture of petroleum coke?
(A) Naphtha
(B) Vacuum residue
(C) Light gas oil
(D) Diesel
by

1 Answer

Answer :

(B) Vacuum residue
by

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Last Answer : (D) Atmospheric residue

Which of the following fuels is generally not used in thermal power plant boiler firing? (A) Furnace oil, light diesel oil and tar/PCM (B) Pulverised coking coal (C) Coal middling from washeries (D) B.F. gas, coke oven gas and L.D. converter gas

Description : Which of the following fuels is generally not used in thermal power plant boiler firing? (A) Furnace oil, light diesel oil and tar/PCM (B) Pulverised coking coal (C) Coal middling from washeries (D) B.F. gas, coke oven gas and L.D. converter gas

Last Answer : (B) Pulverised coking coal

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Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas? (A) Water (B) Naphtha (C) Tar (D) Coal/coke oven gas

Description : Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas? (A) Water (B) Naphtha (C) Tar (D) Coal/coke oven gas

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Petroleum coke is commercially produced by the __________ process. (A) Hydrocracking (B) Visbreaking (C) Fluid catalytic cracking (D) Delayed coking

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Description : 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 (A) Thermal cracking (B) Gum formation (C) Coking (D) Discoloration

Last Answer : (C) Coking

Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition? (A) Electrolysis of water (B) Cryogenic removal of H2 from coke oven gas (C) Steam reforming of naphtha (D) Natural gas cracking

Description : Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition? (A) Electrolysis of water (B) Cryogenic removal of H2 from coke oven gas (C) Steam reforming of naphtha (D) Natural gas cracking

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

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Last Answer : (A) Iron-steam reaction

Which of the following is the costliest source of getting hydrogen on commercial scale for the manufacture of nitrogenous fertiliser? (A) Coal gasification (B) Steam reforming of naphtha (C) Electrolysis of water (D) Coke oven gas

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Which of the following has the highest viscosity of all (at a given temperature)? (A) Naphtha (B) Fuel oil (C) Light diesel oil (D) Petrol

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Last Answer : (B) Fuel oil

Maximum use of petroleum coke is in (A) Adsorption refining operation (B) Fuel gas manufacture (C) Carbon electrode manufacture (D) Iron ore reduction

Description : Maximum use of petroleum coke is in (A) Adsorption refining operation (B) Fuel gas manufacture (C) Carbon electrode manufacture (D) Iron ore reduction

Last Answer : (C) Carbon electrode manufacture

Pick out the wrong statement. (A) Percentage of ash in coke produced from medium coking coal is more than that in coal (B) The calorific value (kcal/Nm3 ) of coke oven gas reduces on removal of hydrogen from it by cryogenic method (C) Ash is normally removed as 'fly-ash' in Kopper-Totzek process of coal gasification (D) Coal based fertiliser plants in India at Talcher (Orissa) and Ramagundam (A.P) employ Kopper-Totzek process of coal gasification

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Last Answer : (C) Ash is normally removed as 'fly-ash' in Kopper-Totzek process of coal gasification

The order of preference for feedstock to a catalytic reformer is (A) Catalytic naphtha - coking naphtha - virgin naphtha (B) Coking naphtha - virgin naphtha - catalytic naphtha (C) Virgin naphtha - catalytic naphtha - coking naphtha (D) Virgin naphtha - coking naphtha - catalytic naphtha

Description : The order of preference for feedstock to a catalytic reformer is (A) Catalytic naphtha - coking naphtha - virgin naphtha (B) Coking naphtha - virgin naphtha - catalytic naphtha (C) Virgin naphtha - catalytic naphtha - coking naphtha (D) Virgin naphtha - coking naphtha - catalytic naphtha

Last Answer : (B) Coking naphtha - virgin naphtha - catalytic naphtha

Which of the following petroleum products contain minimum sulphur? (A) Naphtha (B) Kerosene (C) LSHS (D) Furnace oil

Description : Which of the following petroleum products contain minimum sulphur? (A) Naphtha (B) Kerosene (C) LSHS (D) Furnace oil

Last Answer : (A) Naphtha

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? (A) Naphtha (B) Petrol (C) Kerosene (D) Heavy fuel oil

Description : 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? (A) Naphtha (B) Petrol (C) Kerosene (D) Heavy fuel oil

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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

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Which of the following has the lowest viscosity (at a given temperature) of all? (A) Naphtha (B) Kerosene (C) Diesel (D) Lube oil

Description : Which of the following has the lowest viscosity (at a given temperature) of all? (A) Naphtha (B) Kerosene (C) Diesel (D) Lube oil

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Which of the following has maximum hydrogen/carbon ratio (by weight)? (A) Naphtha (B) Gasoline (C) Diesel (D) Fuel oil

Description : Which of the following has maximum hydrogen/carbon ratio (by weight)? (A) Naphtha (B) Gasoline (C) Diesel (D) Fuel oil

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Mixed gas' used in steel plants is a mixture of (A) B.F. gas and coke oven gas (B) Coke oven gas and converter gas (C) Coke oven gas and L.P.G (D) Blast furnace gas and naphtha vapor

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Last Answer : (A) B.F. gas and coke oven gas

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Description : Preheating of coal charge for the coke ovens reduces the (A) Time of carbonisation (B) Yield of gas and tar (C) Fuel consumption in coking (D) All (A), (B) and (C)

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

Which of the following is the costliest method for commercial production of hydrogen for ammonia synthesis? (A) H2 separation from coke oven gas(B) Steam reforming of naphtha(C) Cracking of natural gas(D) Electrolysis of water

Description : Which of the following is the costliest method for commercial production of hydrogen for ammonia synthesis? (A) H2 separation from coke oven ga (B) Steam reforming of naphtha (C) Cracking of natural gas (D) Electrolysis of water

Last Answer : (D) Electrolysis of water

Naphthalene is removed from coke oven gas by (A) Scrubbing with wash oil (a petroleum product) (B) Adsorbing on bog iron bed (C) Absorbing in vetro-coke solution (D) None of these

Description : Naphthalene is removed from coke oven gas by (A) Scrubbing with wash oil (a petroleum product) (B) Adsorbing on bog iron bed (C) Absorbing in vetro-coke solution (D) None of these

Last Answer : (A) Scrubbing with wash oil (a petroleum product)

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

H2S present in naphtha reformed gas is removed by absorbing with (A) Ethanolamine (B) K2CO3 (C) HCl (D) Vacuum gas oi

Description : H2S present in naphtha reformed gas is removed by absorbing with (A) Ethanolamine (B) K2CO3 (C) HCl (D) Vacuum gas oi

Last Answer : (A) Ethanolamine

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

Last Answer : (C) Atmospheric gas oil

Most widely used solvent for dewaxing is (A) Methyl-ethyl-ketone (MEK) (B) Naphtha (C) Petroleum ether (D) Sodium plumbite

Description : Most widely used solvent for dewaxing is (A) Methyl-ethyl-ketone (MEK) (B) Naphtha (C) Petroleum ether (D) Sodium plumbite

Last Answer : (A) Methyl-ethyl-ketone (MEK)

Choose the correct statement. (A) Coking tendency increases with increasing molecular weight (B) Coking tendency decreases with increasing molecular weight (C) Higher pressure enhances coke formation (D) Coking is an exothermic reaction

Description : Choose the correct statement. (A) Coking tendency increases with increasing molecular weight (B) Coking tendency decreases with increasing molecular weight (C) Higher pressure enhances coke formation (D) Coking is an exothermic reaction

Last Answer : (A) Coking tendency increases with increasing molecular weigh

Beehive coke oven (A) Facilitates by-products recovery (B) Takes 2-3 days for coking of coal but requires no external fuel for heating (C) Gives larger yield of coke (around 85%) as compared to by-product ovens (D) Produces coke with very poor strength

Description : Beehive coke oven (A) Facilitates by-products recovery (B) Takes 2-3 days for coking of coal but requires no external fuel for heating (C) Gives larger yield of coke (around 85%) as compared to by-product ovens (D) Produces coke with very poor strength

Last Answer : (B) Takes 2-3 days for coking of coal but requires no external fuel for heating

Fussain (A) Is friable, charcoal like substance(B) Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal (C) Is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation (D) All (A), (B) and (C)

Description : Fussain (A) Is friable, charcoal like substance (B) Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal (C) Is non-coking, but when blended with highly coking ... its swelling and produces high strength coke on carbonisation (D) All (A), (B) and (C)

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

Prime coking coal is always blended with medium or non- coking coal before carbonisation (A) To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls (B) Because, it alone produces unreactive coke (C) Both (A) and (B) (D) Neither (A) nor (B)

Description : Prime coking coal is always blended with medium or non- coking coal before carbonisation (A) To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls (B) Because, it alone produces unreactive coke (C) Both (A) and (B) (D) Neither (A) nor (B)

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

Anthracite can be used for (A) Recarbonising steel (B) Making carbon electrodes(C) Blending with highly coking coal to check its swelling which helps insaving coke even walls from damage and to produce high strength coke(D) All (A), (B) and (C)

Description : Anthracite can be used for (A) Recarbonising steel (B) Making carbon electrodes (C) Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke (D) All (A), (B) and (C)

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

Ash content in the coke produced from a coking coal having 20% ash may be around __________ percent. (A) 6 (B) 12 (C) 18 (D) 24

Description : Ash content in the coke produced from a coking coal having 20% ash may be around __________ percent. (A) 6 (B) 12 (C) 18 (D) 24

Last Answer : (D) 24

Pick out the wrong statement. (A) Cokes of high reactivity are obtained from weakly coking coals (B) Cokes of high reactivity are obtained from strongly coking coals (C) Reactivity of coke is inversely proportional to its absolute density (D) Abrasion index of the coke is a measure of its hardness

Description : Pick out the wrong statement. (A) Cokes of high reactivity are obtained from weakly coking coals (B) Cokes of high reactivity are obtained from strongly coking coals (C) Reactivity of coke is inversely proportional to its absolute density (D) Abrasion index of the coke is a measure of its hardness

Last Answer : (B) Cokes of high reactivity are obtained from strongly coking coals

Coking time in narrow by-product coke ovens is around __________ hours. (A) 18 (B) 48 (C) 8 (D) 80

Description : Coking time in narrow by-product coke ovens is around __________ hours. (A) 18 (B) 48 (C) 8 (D) 80

Last Answer : (A) 18

Coking time in beehive coke oven is about (A) 12 hours (B) 2-3 days (C) One week (D) Two weeks

Description : Coking time in beehive coke oven is about (A) 12 hours (B) 2-3 days (C) One week (D) Two weeks

Last Answer : (B) 2-3 days

Presence of free moisture in coal during its high temperature carbonisation (A) Reduces the coking time (B) Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls (C) Increases the loss of fine coal dust from the ovens when charging (D) None of these

Description : Presence of free moisture in coal during its high temperature carbonisation (A) Reduces the coking time (B) Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls (C) Increases the loss of fine coal dust from the ovens when charging (D) None of these

Last Answer : (B) Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls

Raw materials for 'Solvay Process' for manufacture of the soda ash are (A) Salt, limestone and coke or gas(B) Ammonia, salt and limestone(C) Ammonia limestone and coke(D) None of these

Description : Raw materials for 'Solvay Process' for manufacture of the soda ash are (A) Salt, limestone and coke or gas (B) Ammonia, salt and limestone (C) Ammonia limestone and coke (D) None of these

Last Answer : (A) Salt, limestone and coke or gas

Aniline point is a property of the (A) Diesel (B) LPG (C) Naphtha (D) Gasoline

Description : Aniline point is a property of the (A) Diesel (B) LPG (C) Naphtha (D) Gasoline

Last Answer : (C) Naphtha

The catalytic cracking of heavier petroleum fraction is done to produce mainly (A) Gasoline (B) Asphalt (C) Diesel oil (D) Tar

Description : The catalytic cracking of heavier petroleum fraction is done to produce mainly (A) Gasoline (B) Asphalt (C) Diesel oil (D) Tar

Last Answer : (C) Diesel oil

The proper arrangement of the petroleum fractions in order of their boiling points is (A) Lubricating oil > diesel > petrol > LPG (B) Lubricating oil > petrol > diesel > LPG (C) Petrol > lubricating oil > diesel > LPG (D) Petrol > diesel > LPG > lubricating oil

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Last Answer : (A) Lubricating oil > diesel > petrol > LPG

. C/H ratio is the minimum in case of (A) Furnace oil (B) Natural gas (C) Coal (D) Naphtha

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Last Answer : (B) Natural gas

C/H ratio is the maximum in case of (A) Coal (B) Furnace oil (C) Natural gas (D) Naphtha

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Last Answer : (A) Coal

. Reforming (A) Uses naphtha as feedstock (B) Does not much affect the molecular weight of the feed (C) Improves the quality & yield of gasoline (D) All (A), (B) and (C)

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

The coking process normally mostly used in Indian oil refineries is the __________ coking process. (A) Delayed (B) Flexi (C) Fluid (D) Contact

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Which of the following oil gasification processes is non-catalytic? (A) Semet-Solvay process (B) Segas process (C) Onia-Gegi process (D) Steam reforming of naphtha

Description : Which of the following oil gasification processes is non-catalytic? (A) Semet-Solvay process (B) Segas process (C) Onia-Gegi process (D) Steam reforming of naphtha

Last Answer : (A) Semet-Solvay process

In Hydrofining catalytic desulphurisation process for sweetening of petroleum products, use of hydrogen (A) Enhances the desulphurisation process (B) Minimises coke formation (C) Both (A) and (B) (D) Neither (A) nor (B

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