Tetra-ethyl lead is added in gasoline to (A) Increase its smoke point (B) Reduce gum formation(C) Reduce the pour point(D) Increase its octane numbe

Tetra-ethyl lead is added in gasoline to
(A) Increase its smoke point
(B) Reduce gum formation
(C) Reduce the pour point
(D) Increase its octane numbe
by

1 Answer

Answer :

(D) Increase its octane numbe
by

Related questions

Phenols are added in gasoline to (A) Improve the octane number(B) Act as an antioxidant(C) Reduce its viscosity(D) Increase its pour point

Description : Phenols are added in gasoline to (A) Improve the octane number (B) Act as an antioxidant (C) Reduce its viscosity (D) Increase its pour point

Last Answer : (B) Act as an antioxidant

Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm2 is maintained during cracking mainly to (A) Increase the yield of light distillates (B) Suppress coke formation (C) Enhance the octane number of gasoline (D) Reduce gum content in gasoline

Description : Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm2 is maintained during cracking mainly to (A) Increase the yield of ... coke formation (C) Enhance the octane number of gasoline (D) Reduce gum content in gasoline

Last Answer : (B) Suppress coke formation

The two reference fuel used for cetane rating are (a) Cetane and iso octane (b) Cetane and tetra ethyl lead (c) Cetance and n-heptane (d) Cetane and α- methyl naphthalene

Description : The two reference fuel used for cetane rating are (a) Cetane and iso octane (b) Cetane and tetra ethyl lead (c) Cetance and n-heptane (d) Cetane and α- methyl naphthalene

Last Answer : Ans : d

The colour of gasoline is an indication of its (A) Octane number (B) Lead susceptibility (C) Gum forming tendency & thoroughness of refining (D) None of these

Description : The colour of gasoline is an indication of its (A) Octane number (B) Lead susceptibility (C) Gum forming tendency & thoroughness of refining (D) None of these

Last Answer : (C) Gum forming tendency & thoroughness of refining

The amount of tetraethyl lead added to improve the octane number of motor gasoline is around __________ c.c per gallon of petrol. (A) 3 (B) 300 (C) 3000 (D) 1000

Description : The amount of tetraethyl lead added to improve the octane number of motor gasoline is around __________ c.c per gallon of petrol. (A) 3 (B) 300 (C) 3000 (D) 1000

Last Answer : (A) 3

__________ determination is not a very significant and important test for gasoline. (A) Gum & sulphur content (B) Viscosity (C) Octane number (D) Reid vapor pressure

Description : __________ determination is not a very significant and important test for gasoline. (A) Gum & sulphur content (B) Viscosity (C) Octane number (D) Reid vapor pressure

Last Answer : (B) Viscosity

In catalytic cracking, the (A) Gasoline obtained has a very low octane number (B) Pressure & temperature is very high (C) Gasoline obtained has very high aromatic content (D) Gasoline obtained has very high amount of gum forming compounds

Description : In catalytic cracking, the (A) Gasoline obtained has a very low octane number (B) Pressure & temperature is very high (C) Gasoline obtained has very high aromatic content (D) Gasoline obtained has very high amount of gum forming compounds

Last Answer : (C) Gasoline obtained has very high aromatic content

Presence of sulphur in gasoline (A) Leads to corrosion (B) Increases lead susceptibility (C) Decreases gum formation (D) Helps during stabilisatio

Description : Presence of sulphur in gasoline (A) Leads to corrosion (B) Increases lead susceptibility (C) Decreases gum formation (D) Helps during stabilisatio

Last Answer : (A) Leads to corrosion

Octane number of gasoline is a measure of its (A) Resistance to knock (B) Ignition delay (C) Ignition temperature (D) Smoke point

Description : Octane number of gasoline is a measure of its (A) Resistance to knock (B) Ignition delay (C) Ignition temperature (D) Smoke point

Last Answer : (A) Resistance to knock

Methyl tertiary butyl ether (MTBE), a high octane (octane no. = 115) gasoline blending component is produced by the simple additive reaction of isobutylene with (A) Methyl alcohol (B) Ethyl alcohol (C) Methane (D) Ethane

Description : Methyl tertiary butyl ether (MTBE), a high octane (octane no. = 115) gasoline blending component is produced by the simple additive reaction of isobutylene with (A) Methyl alcohol (B) Ethyl alcohol (C) Methane (D) Ethane

Last Answer : (A) Methyl alcohol

Which of the following additives improves the cetane number of diesel? (A) Amyl nitrate (B) Ethyl mercaptan (C) Naphthenic acid (D) Tetra ethyl lead

Description : Which of the following additives improves the cetane number of diesel? (A) Amyl nitrate (B) Ethyl mercaptan (C) Naphthenic acid (D) Tetra ethyl lead

Last Answer : (B) Ethyl mercaptan

Which of the following is an organometallic compound? (A) Isopropyl alcohol (B) Tetra-ethyl lead (C) Zeolite (D) Cumene

Description : Which of the following is an organometallic compound? (A) Isopropyl alcohol (B) Tetra-ethyl lead (C) Zeolite (D) Cumene

Last Answer : (B) Tetra-ethyl lead

Antioxidants are added in petrol to (A) Impart colour to it, for easy identification (B) Minimise the gum formation (C) Prevent icing of the carburettor (D) Prevent the lead build up in engines

Description : Antioxidants are added in petrol to (A) Impart colour to it, for easy identification (B) Minimise the gum formation (C) Prevent icing of the carburettor (D) Prevent the lead build up in engines

Last Answer : (B) Minimise the gum formation

Visbreaking process is used mainly for making (A) High cetane diesel (B) High octane gasoline (C) Fuel oil (D) Smoke free kerosene

Description : Visbreaking process is used mainly for making (A) High cetane diesel (B) High octane gasoline (C) Fuel oil (D) Smoke free kerosene

Last Answer : (C) Fuel oil

Anti-knock for compression ignition engines is a) napthene b) tetra ethyl lead c) amyl nitrate d) hexadecane

Description : Anti-knock for compression ignition engines is a) napthene b) tetra ethyl lead c) amyl nitrate d) hexadecane

Last Answer : Answer: c Explanation: Amyl nitrate is the anti-knock for compression ignition engines.

Tetraethyl lead is added to the petrol to increase its octane number, because its octane number is (A) More than 100 (B) Round about 100 (C) Between 50 and 100 (D) Less than 25

Description : Tetraethyl lead is added to the petrol to increase its octane number, because its octane number is (A) More than 100 (B) Round about 100 (C) Between 50 and 100 (D) Less than 25

Last Answer : (A) More than 100

Higher pressure in the reforming reactor (A) Increases coke formation (B) Increases the rate of reaction(C) Produces high octane number gasoline(D) None of these

Description : Higher pressure in the reforming reactor (A) Increases coke formation (B) Increases the rate of reaction (C) Produces high octane number gasoline (D) None of these

Last Answer : (D) None of these

Gum formation in stored gasoline is mainly due to the (A) Alkylation of unsaturated (B) Presence of sulphur (C) Oxidation & polymerisation of unsaturated (D) Higher aromatic content

Description : Gum formation in stored gasoline is mainly due to the (A) Alkylation of unsaturated (B) Presence of sulphur (C) Oxidation & polymerisation of unsaturated (D) Higher aromatic content

Last Answer : (B) Presence of sulphur

Iso-octane is used as a reference substance in the definition of octane number and it is assigned an octane number value of 100. Iso-octane is chemically known as (A) α-methyl naphthalene (B) 2-2-4 tri methyl pentane (C) 1, 3 butadiene (D) Tetra methyl ethylene

Description : Iso-octane is used as a reference substance in the definition of octane number and it is assigned an octane number value of 100. Iso-octane is chemically known as (A) α-methyl naphthalene (B) 2-2-4 tri methyl pentane (C) 1, 3 butadiene (D) Tetra methyl ethylene

Last Answer : (B) 2-2-4 tri methyl pentane

Use of gasoline blend like tetraethyl lead in internal combustion engine a. increases the octane rating of the fuel b. allows engine to operate at higher compression ratio c. avoids auto-ignition of fuel d. all of the above

Description : Use of gasoline blend like tetraethyl lead in internal combustion engine a. increases the octane rating of the fuel b. allows engine to operate at higher compression ratio c. avoids auto-ignition of fuel d. all of the above

Last Answer : ANSWER d. all of the above

Reid vapour pressure of gasoline is the measure of its (A) Pour point (B) Cloud point (C) Vapour locking tendency (D) Carbon residue

Description : Reid vapour pressure of gasoline is the measure of its (A) Pour point (B) Cloud point (C) Vapour locking tendency (D) Carbon residue

Last Answer : (C) Vapour locking tendency

Pick out the correct statement pertaining to catalytic cracking. (A) With increase in the reactor pressure, octane number of gasoline decreases (B) With increase in the reactor temperature, gasoline yield decreases for a given conversion (C) Percentage conversion increases with increase in the catalyst to oil ratio (D) All (A), (B) and (C)

Description : Pick out the correct statement pertaining to catalytic cracking. (A) With increase in the reactor pressure, octane number of gasoline decreases (B) With increase in the reactor temperature, gasoline yield decreases for a given ... with increase in the catalyst to oil ratio (D) All (A), (B) and (C)

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

Mercaptans are (A) Low boiling sulphur compounds(B) Added in LPG cylinders to detect gas leakage by its smell(C) Undesirable in petrol, as they reduce its octane number(D) All (A), (B) and (C)

Description : Mercaptans are (A) Low boiling sulphur compounds (B) Added in LPG cylinders to detect gas leakage by its smell (C) Undesirable in petrol, as they reduce its octane number (D) All (A), (B) and (C)

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

Small amount of gasoline is added to alcohol to a) reduce the emission b) to increase the power output c) to increase the efficiency d) to improve cold weather starting

Description : Small amount of gasoline is added to alcohol to a) reduce the emission b) to increase the power output c) to increase the efficiency d) to improve cold weather starting

Last Answer : Answer: d Explanation: None.

Which of the following methods can be used to increase the octane rating of gasoline? (a) Adding branched-chain alkanes (b) Adding tetraethyllead (c) Adding aromatic hydrocarbons (d) All of these

Description : Which of the following methods can be used to increase the octane rating of gasoline? (a) Adding branched-chain alkanes (b) Adding tetraethyllead (c) Adding aromatic hydrocarbons (d) All of these

Last Answer : All of these

Presence of predominantly large quantity of aromatics (polynuclear) is not desirable in aviation fuel, because it has (A) High pour point and low smoke point (B) Low viscosity index (C) High self-ignition temperature (D) All (A), (B) and (C)

Description : Presence of predominantly large quantity of aromatics (polynuclear) is not desirable in aviation fuel, because it has (A) High pour point and low smoke point (B) Low viscosity index (C) High self-ignition temperature (D) All (A), (B) and (C)

Last Answer : (B) Low viscosity index

Paraffins are desirable in lubricating oil, as it has got high (A) Viscosity (B) Viscosity index (C) Smoke point (D) Pour poin

Description : Paraffins are desirable in lubricating oil, as it has got high (A) Viscosity (B) Viscosity index (C) Smoke point (D) Pour poin

Last Answer : (C) Smoke point

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

Presence of aromatics in (A) Diesel increases its cetane number (B) Kerosene increases its smoke point (C) Petrol increases its octane number (D) All (A), (B) and (C)

Description : Presence of aromatics in (A) Diesel increases its cetane number (B) Kerosene increases its smoke point (C) Petrol increases its octane number (D) All (A), (B) and (C)

Last Answer : (C) Petrol increases its octane number

Pick out the correct statement. (A) Paraffins have higher octane number than corresponding iso-paraffin (B) Paraffins have lower smoke point than aromatics

Description : Pick out the correct statement. (A) Paraffins have higher octane number than corresponding iso-paraffin (B) Paraffins have lower smoke point than aromatics

Last Answer : (B) Paraffins have lower smoke point than aromatics

Aromatics have the highest __________ of all the hydrocarbons of same carbon atoms. (A) Smoke point (B) Octane number (C) Cetane number (D) Viscosity

Description : Aromatics have the highest __________ of all the hydrocarbons of same carbon atoms. (A) Smoke point (B) Octane number (C) Cetane number (D) Viscosity

Last Answer : (B) Octane number

Straight run petrol as compared to methyl/ethyl alcohol has (A) Lower calorific value (B) Lower octane number (C) Higher specific gravity (D) Higher ignition temperature

Description : Straight run petrol as compared to methyl/ethyl alcohol has (A) Lower calorific value (B) Lower octane number (C) Higher specific gravity (D) Higher ignition temperature

Last Answer : (B) Lower octane number

Which of the following binary systems is an example of a maximum boiling azeotrope? (A) Water-hydrochloric acid (B) Acetone-carbon disulphide (C) Water-ethyl alcohol (D) n-heptane-n-octane

Description : Which of the following binary systems is an example of a maximum boiling azeotrope? (A) Water-hydrochloric acid (B) Acetone-carbon disulphide (C) Water-ethyl alcohol (D) n-heptane-n-octane

Last Answer : (A) Water-hydrochloric acid

Fuel oil is subjected to visbreaking to reduce its (A) Pour point (B) Viscosity (C) Pressure drop on pumping (D) All (A), (B) and (C

Description : Fuel oil is subjected to visbreaking to reduce its (A) Pour point (B) Viscosity (C) Pressure drop on pumping (D) All (A), (B) and (C

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

Octane numbers of motor gasoline used in India and America are respectively (A) 87 & 94 (B) 94 & 87 (C) 94 & 100 (D) 83 & 100

Description : Octane numbers of motor gasoline used in India and America are respectively (A) 87 & 94 (B) 94 & 87 (C) 94 & 100 (D) 83 & 100

Last Answer : (A) 87 & 94

Paraffin base crude oil as compared to asphalt base crude gives (A) Higher yield of straight run gasoline (B) Higher octane number gasoline (C) Lower viscosity index lube oil (D) Poorer yield of lube oil

Description : Paraffin base crude oil as compared to asphalt base crude gives (A) Higher yield of straight run gasoline (B) Higher octane number gasoline (C) Lower viscosity index lube oil (D) Poorer yield of lube oil

Last Answer : (A) Higher yield of straight run gasoline

Octane number (unleaded) of reformed gasoline may be upto (A) 60 (B) 70 (C) 80 (D) 90

Description : Octane number (unleaded) of reformed gasoline may be upto (A) 60 (B) 70 (C) 80 (D) 90

Last Answer : (D) 90

The octane number of aviation gasoline may be (A) 79 (B) 87 (C) 97 (D) > 100

Description : The octane number of aviation gasoline may be (A) 79 (B) 87 (C) 97 (D) > 100

Last Answer : (D) > 100

Which of the following gasoline (unleaded) has the least octane number? (A) Catalytically cracked gasoline (B) Straight run gasoline (C) Catalytically reformed gasoline (D) Polymer gasoline

Description : Which of the following gasoline (unleaded) has the least octane number? (A) Catalytically cracked gasoline (B) Straight run gasoline (C) Catalytically reformed gasoline (D) Polymer gasoline

Last Answer : (B) Straight run gasoline

Pick out the wrong statement. (A) Alkylation produces a larger iso-paraffin (having higher octane number) from the reaction of an olefin with smaller iso-paraffin (B) Catalytic alkylation processes use HF, AlCl3 & H2SO4 as Catalysts (C) All the alkylation processes use very high temperature (> 1000°C) (D) Gasoline having an octane number of 90 can be produced by alkylation process

Description : Pick out the wrong statement. (A) Alkylation produces a larger iso-paraffin (having higher octane number) from the reaction of an olefin with smaller iso-paraffin (B) Catalytic alkylation processes use HF ... (> 1000°C) (D) Gasoline having an octane number of 90 can be produced by alkylation process

Last Answer : (C) All the alkylation processes use very high temperature (> 1000°C)

Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic (A) Cracking (B) Polymerisation (C) Reforming (D) Isomerisation

Description : Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic (A) Cracking (B) Polymerisation (C) Reforming (D) Isomerisation

Last Answer : (C) Reforming

Octane number (unleaded) of gasoline produced by isomerisation of butane may be about (A) 45 (B) 55 (C) 70 (D) 90

Description : Octane number (unleaded) of gasoline produced by isomerisation of butane may be about (A) 45 (B) 55 (C) 70 (D) 90

Last Answer : (C) 70

Choose the correct statement regarding thermal cracking. (A) Moderate changes in operating temperature does not change the depth of cracking (B) Increased residence time results in the decreased severity of cracking (C) At low pressure, the yield of lighter hydrocarbons are more (D) Greater depth of cracking gives lower octane number gasoline

Description : Choose the correct statement regarding thermal cracking. (A) Moderate changes in operating temperature does not change the depth of cracking (B) Increased residence time results in the decreased ... of lighter hydrocarbons are more (D) Greater depth of cracking gives lower octane number gasoline

Last Answer : (D) Greater depth of cracking gives lower octane number gasoline

Octane number of gasoline produced by two stage fluidised catalytic cracking process is (A) 80 (B) 87 (C) 92 (D) 97

Description : Octane number of gasoline produced by two stage fluidised catalytic cracking process is (A) 80 (B) 87 (C) 92 (D) 97

Last Answer : (D) 97

Power alcohol as compared to straight run gasoline has lower (A) Calorific value (B) Octane number (C) Specific gravity (D) Viscosity

Description : Power alcohol as compared to straight run gasoline has lower (A) Calorific value (B) Octane number (C) Specific gravity (D) Viscosity

Last Answer : (A) Calorific value

The octane rating of gasoline provides information on(a) its antiknock properties(b) its ignition properties(c) its percentage proportion of octane(d) its percentage content of isooctane

Description : The octane rating of gasoline provides information on (a) its antiknock properties (b) its ignition properties (c) its percentage proportion of octane (d) its percentage content of isooctane

Last Answer : its antiknock properties

Is it true that higher octane gasoline is consumed more slowly by engines,and it doesn't pay to purchase regular gasoline solely to save $$ when it is not required for your vehicle?

Description : Is it true that higher octane gasoline is consumed more slowly by engines,and it doesn't pay to purchase regular gasoline solely to save $$ when it is not required for your vehicle?

Last Answer : No it is not true that premium gas burns slower than reg. It is a complete waste of money to use a higher grade than required by the manufacturer.

Do fuel efficient cars typically use higher octane gasoline?

Description : Do fuel efficient cars typically use higher octane gasoline?

Last Answer : No, higher octane fuel is only necessary for higher performance cars. Highly efficient cars can usually use the lowest octane fuels, because they are not designed for performance.

Octane number of gasoline is obtained by comparing the performance of the engine when running on a mixture of the following hydrocarbons A. ethane and methane B. normal heptane and iso-octane C. iso-heptane and octane D. iso-octane and TEL

Description : Octane number of gasoline is obtained by comparing the performance of the engine when running on a mixture of the following hydrocarbons A. ethane and methane B. normal heptane and iso-octane C. iso-heptane and octane D. iso-octane and TEL

Last Answer : ANSWER : B

Gasoline with an octane number of 90 is equivalent in knocking characteristics to a mixture of heptane and isooctane of the following composition : (a) 20% heptane + 80% isooctane (b) 90% heptane + 10% isooctane (c) 80% heptane + 20% isooctane (d) 10% heptane + 90% isooctane

Description : Gasoline with an octane number of 90 is equivalent in knocking characteristics to a mixture of heptane and isooctane of the following composition : (a) 20% heptane + 80% isooctane (b) 90% heptane + 10% isooctane (c) 80% heptane + 20% isooctane (d) 10% heptane + 90% isooctane

Last Answer : 10% heptane + 90% isooctane