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

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
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Reference fuels for knock rating of SI engine fuels would include (a) Iso octane alpha methyl naphthalene (b) Normal octance and aniline (c) Isooctance and n octane (d) N heptane and iso octane

Description : Reference fuels for knock rating of SI engine fuels would include (a) Iso octane alpha methyl naphthalene (b) Normal octance and aniline (c) Isooctance and n octane (d) N heptane and iso octane

Last Answer : Ans : d

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

A mixture containing 65% of iso-octane and 35% of normal heptane will have a) cetane number 65 b) octane number 65 c) cetane number 35 d) octane number 35

Description : A mixture containing 65% of iso-octane and 35% of normal heptane will have a) cetane number 65 b) octane number 65 c) cetane number 35 d) octane number 35

Last Answer : Answer: b Explanation: A mixture containing 65% of iso-octane and 35% of normal heptane will have octane number 65 as octane number is the number percentage containing iso-octane.

A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of a) 75% iso-octane and 25% normal heptane b) 75% normal heptane and 25% iso-octane c) 75% petrol and 25% diesel d) 75% diesel and 25% petrol

Description : A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of a) 75% iso-octane and 25% normal heptane b) 75% normal heptane and 25% iso-octane c) 75% petrol and 25% diesel d) 75% diesel and 25% petrol

Last Answer : Answer: a Explanation: None.

Which of the following fuel detonates readily? a) Benzene b) Iso-octane c) Normal heptane d) Alcohol

Description : Which of the following fuel detonates readily? a) Benzene b) Iso-octane c) Normal heptane d) Alcohol

Last Answer : Answer: c Explanation: Normal heptane detonates readily.

Which of the following fuel has little tendency towards detonation? a) Benzene b) Iso-octane c) Normal heptane d) Alcohol

Description : Which of the following fuel has little tendency towards detonation? a) Benzene b) Iso-octane c) Normal heptane d) Alcohol

Last Answer : Answer: b Explanation: Benzene has little tendency towards detonation.

A fuel of cetane number 40 has the same ignition quality as a mixture of a) 40% cetane and 60% alpha methyl naphthalene b) 40% alpha methyl naphthalene and 60% cetane c) 40% petrol and 60% diesel d) 40% diesel and 60% petrol

Description : A fuel of cetane number 40 has the same ignition quality as a mixture of a) 40% cetane and 60% alpha methyl naphthalene b) 40% alpha methyl naphthalene and 60% cetane c) 40% petrol and 60% diesel d) 40% diesel and 60% petrol

Last Answer : Answer: a Explanation: A fuel of cetane number 40 has the same ignition quality as a mixture of 40% cetane and 60% alpha methyl naphthalene as cetane number is counted on cetane percentage.

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

The normal heptane(C7H16) is given a rating of ____________ octane number. a) 0 b) 50 c) 100 d) 120

Description : The normal heptane(C7H16) is given a rating of ____________ octane number. a) 0 b) 50 c) 100 d) 120

Last Answer : Answer: a Explanation: None.

The compound that has the least value for octane number is – (1) 2-methyl heptane (2) Iso-octane (3) 2,2-dimethyl hexane (4) n-heptane

Description : The compound that has the least value for octane number is – (1) 2-methyl heptane (2) Iso-octane (3) 2,2-dimethyl hexane (4) n-heptane

Last Answer : (4) n-heptane Explanation: Octane rating or octane number is a standard measure of the performance of a motor or aviation fuel. The higher the octane number, the more compression the fuel can withstand. Isooctane (upper) has an octane rating of 100 whereas n-heptane has an octane rating of O.

The compound that has the least value for octane number is : (1) 2-methyl heptane (2) Iso-octane (3) 2,2-dimethyl hexane (4) n-heptane

Description : The compound that has the least value for octane number is : (1) 2-methyl heptane (2) Iso-octane (3) 2,2-dimethyl hexane (4) n-heptane

Last Answer : n-heptane

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

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.

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

Write the values of boiling temperature for cetane(diesel).iso-octane(petrol), Butane, Propane an methane fuel and write effect of it on its system.

Description : Write the values of boiling temperature for cetane(diesel).iso-octane(petrol), Butane, Propane an methane fuel and write effect of it on its system.

Last Answer : Write the values of boiling temperature for cetane(diesel).iso-octane(petrol), Butane, Propane an methane fuel and write effect of it on its system.

Ignition quality of diesel is expressed by a. octane number b. cetane number c. calorific value d. carbon content

Description : Ignition quality of diesel is expressed by a. octane number b. cetane number c. calorific value d. carbon content

Last Answer : ANSWER b. cetane number

Ignition quality of petrol is expressed by a. Octane number b. cetane number c. calorific value d. self-ignition temperature

Description : Ignition quality of petrol is expressed by a. Octane number b. cetane number c. calorific value d. self-ignition temperature

Last Answer : ANSWER a. 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

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

Description : 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

Last Answer : (D) Increase its octane numbe

A fuel with octane number 90 means it is as good as a mixture of : (a) 90% Isooctane + 10% n-heptane (b) 90% n-Heptane + 10% isooctane (c) 2 Litre of 90% isooctane + 2 litre of benzene(d) 2 Litre of 90% n-heptane + 2 litre of benzene

Description : A fuel with octane number 90 means it is as good as a mixture of : (a) 90% Isooctane + 10% n-heptane (b) 90% n-Heptane + 10% isooctane (c) 2 Litre of 90% isooctane + 2 litre of benzene (d) 2 Litre of 90% n-heptane + 2 litre of benzene

Last Answer : 90% Isooctane + 10% n-heptane

In any fuel, the percentage by volume of isooctane in a mixture of isooctane and n-heptane which will knock under same conditions as the fuel being tested, is called : (a) Cracking (b) Iodine number (c) Aromatization (d) Octane number

Description : In any fuel, the percentage by volume of isooctane in a mixture of isooctane and n-heptane which will knock under same conditions as the fuel being tested, is called : (a) Cracking (b) Iodine number (c) Aromatization (d) Octane number

Last Answer : Octane number

Cetane number of alpha methyl naphthalene is assumed to be (A) 0 (B) 100 (C) 50 (D) ∞

Description : Cetane number of alpha methyl naphthalene is assumed to be (A) 0 (B) 100 (C) 50 (D) ∞

Last Answer : (A) 0

Cetane number is a measure of a. ignition quality b. addition in fuel c. calorific value of fuel d. viscosity of the fuel

Description : Cetane number is a measure of a. ignition quality b. addition in fuel c. calorific value of fuel d. viscosity of the fuel

Last Answer : ANSWER a. ignition quality

The tendency of a diesel engine to knock increases if a. engine speed is increased b. engine power is increased c. cetane number of the fuel is increased d. compression ratio is increased

Description : The tendency of a diesel engine to knock increases if a. engine speed is increased b. engine power is increased c. cetane number of the fuel is increased d. compression ratio is increased

Last Answer : ANSWER d. compression ratio is increased

Why iso-octane is chosen as reference fuel for S.I. engines and allotted 100 value for its octane number ?

Description : Why iso-octane is chosen as reference fuel for S.I. engines and allotted 100 value for its octane number ?

Last Answer : Iso-octane permits highest compression without causing knocking.

Why iso-octane is chosen as reference fuel for S.I. engines and allotted 100 value for its octane number ?

Description : Why iso-octane is chosen as reference fuel for S.I. engines and allotted 100 value for its octane number ?

Last Answer : Iso-octane permits highest compression without causing knocking

By higher octane number of SI fuel, it is meant that the fuel has (a) Higher heating value (b) Higher flash point (c) Lower volatility (d) Longer ignition delay

Description : By higher octane number of SI fuel, it is meant that the fuel has (a) Higher heating value (b) Higher flash point (c) Lower volatility (d) Longer ignition delay

Last Answer : Ans : d

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

Octane number of n-heptane is assumed to be (A) 100 (B) 0 (C) 70 (D) ∞

Description : Octane number of n-heptane is assumed to be (A) 100 (B) 0 (C) 70 (D) ∞

Last Answer : (B) 0

Which of the following compounds is assigned the Octane Number of 100 : (a) n-Heptane (b) 2,3,3-Trimethylpentane (c) n-Octane (d) 2,2,4-Trimethylpentane

Description : Which of the following compounds is assigned the Octane Number of 100 : (a) n-Heptane (b) 2,3,3-Trimethylpentane (c) n-Octane (d) 2,2,4-Trimethylpentane

Last Answer : 2,2,4-Trimethylpentane

Which of the following compounds is assigned the Octane Number of zero : (a) n-Octane (b) 2,3,3-Trimethylpentane (c) n-Heptane (d) 2,2,4-Trimethylpentane

Description : Which of the following compounds is assigned the Octane Number of zero : (a) n-Octane (b) 2,3,3-Trimethylpentane (c) n-Heptane (d) 2,2,4-Trimethylpentane

Last Answer : n-Heptane

The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n- heptane and n octane into pure compounds each at 1 atm is (A) -2 RT ln 0.5 (B) -RT ln 0.5 (C) 0.5 RT (D) 2 RT

Description : The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n- heptane and n octane into pure compounds each at 1 atm is (A) -2 RT ln 0.5 (B) -RT ln 0.5 (C) 0.5 RT (D) 2 RT

Last Answer : (B) -RT ln 0.5

Cetane number of petrol is around a. 10 b. 15-20 c. 35 d. 55-70

Description : Cetane number of petrol is around a. 10 b. 15-20 c. 35 d. 55-70

Last Answer : ANSWER b. 15-20

For the best results of efficient combustion, high speed diesel engines need an approximate cetane number of a. 100 b. 50 c. 10 d. 5

Description : For the best results of efficient combustion, high speed diesel engines need an approximate cetane number of a. 100 b. 50 c. 10 d. 5

Last Answer : ANSWER b. 50

Which hydrocarbon molecule with eight carbons would produce the lowest octane number (i.e., the most knocking) when used as a fuel in automobile? (a) 2-Methyl-3,3-dimethylpentane (b) n-Octane (c) 2-Isopropylpentane (d) 2-Methylheptane

Description : Which hydrocarbon molecule with eight carbons would produce the lowest octane number (i.e., the most knocking) when used as a fuel in automobile? (a) 2-Methyl-3,3-dimethylpentane (b) n-Octane (c) 2-Isopropylpentane (d) 2-Methylheptane

Last Answer : n-Octane

If the performance of diesel engine of different sizes, cylinder dimensions and power rating are to be compared, which of the following parameters can be used for such comparison? (a) Swept volume (b) Air fuel ratio (c) Specific brake fuel consumption (d) Volumetric efficiency

Description : If the performance of diesel engine of different sizes, cylinder dimensions and power rating are to be compared, which of the following parameters can be used for such comparison? (a) Swept volume (b) Air fuel ratio (c) Specific brake fuel consumption (d) Volumetric efficiency

Last Answer : Ans :c

Which of the following is an additive used for improving the cetane number of diesel? (A) Tetraethyl lead (B) Tetramethyllead (C) Ethyl nitrate or acetone (D) None of these

Description : Which of the following is an additive used for improving the cetane number of diesel? (A) Tetraethyl lead (B) Tetramethyllead (C) Ethyl nitrate or acetone (D) None of these

Last Answer : (A) Tetraethyl lead

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

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

Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the (A) Elimination of solvent drying facility (B) Higher nitration temperature (C) Lower solvent dilution ratio (D) All (A), (B) & (C)

Description : Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent ... nitration temperature (C) Lower solvent dilution ratio (D) All (A), (B) & (C)

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

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

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

Octane of natural gas is a) 60-80 b) 80-100 c) >100 d) <60

Description : Octane of natural gas is a) 60-80 b) 80-100 c) >100 d)

Last Answer : Answer: c Explanation: The octane number of natural gas is always >

Octane number of petrol normally used in petrol engines is of the order of a. 20-30 b. 40-60 c. 60-70 d. 80-90

Description : Octane number of petrol normally used in petrol engines is of the order of a. 20-30 b. 40-60 c. 60-70 d. 80-90

Last Answer : ANSWER d. 80-90

The quality of petrol is expressed in terms of – (1) Cetane number (2) Gold number (3) Octane number (4) Added unlead compounds

Description : The quality of petrol is expressed in terms of – (1) Cetane number (2) Gold number (3) Octane number (4) Added unlead compounds

Last Answer : (3) Octane number Explanation: Octane rating or octane number is a standard measure of the of the ignition quality of has (gasoline or petrol). Higher this number, the less ... premature burning in the combustioncharnber) when burnt in a standard (spark-ignition internal combustion) engine.

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

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

Definition Of Octane Number And Cetane Number?

Description : Definition Of Octane Number And Cetane Number?

Last Answer : Octane No:-Octane number is defined as the percentage, by volume, of iso octane in the mixture of iso octane and h-heptane. It is the measure of rating of SI engine. Cetane No:- Cetane number ... in the mixture of n-cetane and alpha methyl naphthalene. It is the measure of rating of CI engine.

The quality of petrol is expressed in terms of (1) Cetane number (2) Gold number (3) Octane number (4) Added unlead compounds

Description : The quality of petrol is expressed in terms of (1) Cetane number (2) Gold number (3) Octane number (4) Added unlead compounds

Last Answer : Octane number

What is the quality rating for diesel fuel, similar to the octane number for petrol?

Description : What is the quality rating for diesel fuel, similar to the octane number for petrol?

Last Answer : Catane number