Deemed University 2010 B.Tech Automobile Engineering University: Lingayas University Term: III Title of the : Auto Fuels and Lubricants - Question Paper

Roll No. ..

 

Lingayas University, Faridabad

Examination December, 2009

Course: B.Tech. Year: IInd

Semester: III Paper Code: AE-203E

Subject: Auto Fuels and Lubricants

[Time: 3 Hours] [Max. Marks: 100]

 

Before answering the question, candidate should ensure that they have been supplied the correct and complete question paper. No complaint in this regard, will be entertained after examination.

 

Note: Attempt Five Question in all. All questions carry equal marks.

Q.1. (a) Explain classifications of petroleum fuels. (10)

(b) Explain with a diagram

(i) Catalytic Cracking (ii) Thermal Cracking (10)

Q-2. Write Short note on: (20)

(i) Calorific value

(ii) Fire Point

(iii) Flash point

(iv) Viscocity

(v) Pour Point

Q.3. (a) Give and explain the desirable properties of Diesel fuel. What is cetane number, what does it indicate and what happens when its value becomes too high or too low. (10)

(b) Name and give benefits of adding various additives to Petrol and Diesel fuels. (10)

Q-4. (a) Explain the stages of combustion process in a Spark Ignition engine with p -diagram. (10)

P.T.O.

(b) What is diesel Knock. Give its relation with cetane number. What is ignition delay and on what factors does it depend. (10)

Q-5. (a) Give the various properties of compressed natural gas (CNG). Compare it with the properties of petrol. Why LNG is not suitable for use in automobiles. (10)

(b) Give the drawbacks for the use of alcohol in SI and CI (Spark ignition and Compressed ignition) engines. Give the properties of hydrogen fuel and the drawbacks for using it as fuel. (10)

Q-6. (a) Give the various purposes of lubricating oils. Classify the lubricant oils which are used in gasoline and diesel engines. (10)

(b) Explain and list the properties of lubricating oils (10)

Q-7. (a) Explain with diagram the principle of

(i) Hydrodynamic lubrication and its various stages.

(ii) Boundary Lubrication (10)

(b) Give a list of various components of the lubrication system of a Diesel Engine. State the purpose of each component (10)

Q-8. (a) Name and give reasons for the use of various oil additives. (10)

(b) Explain with diagram the working principle of a fuel cell. List the various advantages over other sources of power. (10)

 

 

Roll No. ..

 

Lingayas University, Faridabad

Examination December, 2009

Course: B.Tech. Year: IInd

Semester: III Paper Code: AE-203E

Subject: Auto Fuels and Lubricants

[Time: 3 Hours] [Max. Marks: 100]

 

Before answering the question, candidate should ensure that they have been supplied the correct and complete question paper. No complaint in this regard, will be entertained after examination.

 

Note: Attempt Five Question in all. All questions carry equal marks.

Q.1. (a) Explain classifications of petroleum fuels. (10)

(b) Explain with a diagram

(i) Catalytic Cracking (ii) Thermal Cracking (10)

Q-2. Write Short note on: (20)

(i) Calorific value

(ii) Fire Point

(iii) Flash point

(iv) Viscocity

(v) Pour Point

Q.3. (a) Give and explain the desirable properties of Diesel fuel. What is cetane number, what does it indicate and what happens when its value becomes too high or too low. (10)

(b) Name and give benefits of adding various additives to Petrol and Diesel fuels. (10)

Q-4. (a) Explain the stages of combustion process in a Spark Ignition engine with p -diagram. (10)

P.T.O.

(b) What is diesel Knock. Give its relation with cetane number. What is ignition delay and on what factors does it depend. (10)

Q-5. (a) Give the various properties of compressed natural gas (CNG). Compare it with the properties of petrol. Why LNG is not suitable for use in automobiles. (10)

(b) Give the drawbacks for the use of alcohol in SI and CI (Spark ignition and Compressed ignition) engines. Give the properties of hydrogen fuel and the drawbacks for using it as fuel. (10)

Q-6. (a) Give the various purposes of lubricating oils. Classify the lubricant oils which are used in gasoline and diesel engines. (10)

(b) Explain and list the properties of lubricating oils (10)

Q-7. (a) Explain with diagram the principle of

(i) Hydrodynamic lubrication and its various stages.

(ii) Boundary Lubrication (10)

(b) Give a list of various components of the lubrication system of a Diesel Engine. State the purpose of each component (10)

Q-8. (a) Name and give reasons for the use of various oil additives. (10)

(b) Explain with diagram the working principle of a fuel cell. List the various advantages over other sources of power. (10)