Automotive Materials And Metallurgy Question Paper of 3rd Semester AE Download Previous Years Question Paper 5

Roll no……………..

Total no. of Questions:09]

B.Tech. (sem.-3^rd)

AUTOMOTIVE MATERIALS AND METALLURGY

SUBJECT CODE: AE-207

PAPER ID:[A0705]

Time : 03 Hours

Instruction to Candidates:

1)    Section – A is Compulsory.

2)    Attempt any four question from section-B.

3)    Attempt any Two questions form section –C.

Section –A

1.       

a.     List out the merits and demerits of liquid fuels over solid fuels.

b.     Define molecular mass.

c.      What is the difference between rotary and reciprocating compressor?

d.     Define ‘prewhirl’.

e.       What do you understand by term ‘psychrometry’

f.       Define sensible heat factor.

g.     How heat transfer differ from thermodynamics.

h.     What is heat exchanger?

i.       Define heat rejection ratio.

j.       What are eco friendly refrigerants?

Section –B

2.     What do you understand by ‘minimum air’ and ‘excess air’ in context of combustion?

3.     Explain effect of complete and incomplete inercooling  in multistage reciprocating compressor.

4.     Explain,  with a neat sketch , the working of a centrifugal compressor and obtain an expression for the work done.

5.     Distinguish between conduction, convection and radiation modes of heat transfer.

6.     Discuss briefly the choice of refrigerant commonly used in automobiles.

Section –C

7.     Explain , briefly, the method used to determine the higher calorific value of the liquid fuel.

8.     A single stage single acting reciprocating air compressor is required to handily 30 m³ of free air per hour measured at 1 bar. The delivery pressure is 6.5 bar and the speed is 450 r.p.m allowing a volumetric efficiency of 45% an isothermal efficiency of 76% and mechanical efficiency of 80%; calculate the indicated mean effective pressure and the power required to drive the compressor.

9.     Explain and show the below mentioned process on psychometric chart-

a.     Sensible Cooling

b.     Sensible Heating   

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Automotive Materials And Metallurgy Question Paper of 3rd Semester AE Download Previous Years Question Paper 4

Roll no……………..

Total no. of Questions:09]

B.Tech. (sem.-3^rd)

AUTOMOTIVE MATERIALS AND METALLURGY

SUBJECT CODE: AE-207

PAPER ID:[A0705]

Time : 03 Hours

Instruction to Candidates:

1)    Section – A is Compulsory.

2)    Attempt any four question from section-B.

3)    Attempt any Two questions form section –C.

Section –A

1.      

a.     Define what is crystallization process?

b.     Discuss what are dislocation present in the  structure of an alloy system.

c.      Discuss the significance of phase rule.

d.     Why are entectic system referred so?

e.      Discuss the role of chromium in steels.

f.       List the characteristic properties required in die steels.

g.     What are the advantages of isothermal annealing process over full annealing?

h.     For what purpose hot dipping process is used?

i.       What is meant by cryogenic wear?

j.       List two applications of ceramics in automotive parts.

Section –B

2.     Bring out the main points of difference between the phenomenon of slip and twinning.

3.     Draw a neat and labeled iron-cematite equilibrium diagram. Discuss the significance of each critical temperature line on this diagram.

4.     What are stainless steels? Why do they get their name ? discuss the role of nickel as an alloying element in these steels.

5.     What are the various objectives for which normalizing treatment is given to steels? Discuss the procedural steps of providing this treatment to hypoeutectoid steels.

6.     Which materials are generally used for the construction of

a.     Cylinder Block

b.     Piston Rings

Also justify your answer.

Section –C

7.     Discuss the general  from of peritiectic and eutectoid reactions. Also shoe these reaction for iron-carbon system. What is the difference between ledeburite and pearlite?

8.        Taking example of a gear, explain the need of surface hardening of steels. What is the major difference in surface hardening given to low carbon steels and to medium carbon steels?

9.     Enumerate the main points of difference between white cast iron and grey cast iron. Discuss their properties and specific applications.

  

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Automotive Materials And Metallurgy Question Paper of 3rd Semester AE Download Previous Years Question Paper 3

Roll no……………..

Total no. of Questions:09]

B.Tech. (sem.-3^rd)

AUTOMOTIVE MATERIALS AND METALLURGY

SUBJECT CODE: AE-207

PAPER ID:[A0705]

Time : 03 Hours

Instruction to Candidates:

1.     SECTION-A is compulsory consisting of Ten question carrying Two marks each.

2.     SECTION-B contains FIVE questions carrying Five marks each and students has to attempt any four questions.

3.     SECTION –C contains Three questions carrying Ten marks each and students has to attempt any Two questions.

Section –A

1.     Write briefly:

a.     Define atomic number. What is crystal imperfection?

b.     What is crystal imperfections?

c.      What is cematite?

d.     Define binary solutions.

e.      Define annealing.

f.       What is hot dipping?

g.     Define fatigue.

h.     Name the material for gudgeon pin.

i.       Give the composition of stainless steel. 

j.       What is thermal coating?

Section –B

2.     Differentiate between slip and twin.

3.     What is recrystallization? How it is different form recovery?

4.     State the applications of composite materials in automobiles.

5.     What is induction hardening? How it is different form flame hardening?

6.     State the criterion to be taken care of while selecting the material for piston and piston ring.

Section –C

7.       

a.     What is allotropy? State which materials exhibit allotropy and why?

b.     What is the difference between annealing and normalizing?

8.     What is Gibbs phase rule? Explain the phase transformations in a system whose components have complete mutual solubility in the liquid state and limited solubility in the solid state.

9.     Write short not on following:

a.     Anodizing

b.     Alloys of Mg

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Automotive Materials And Metallurgy Question Paper of 3rd Semester AE Download Previous Years Question Paper 2

Roll no……………..

Total no. of Questions:09]

B.Tech. (sem.-3^rd)

AUTOMOTIVE MATERIALS AND METALLURGY

SUBJECT CODE: AE-207

PAPER ID:[A0705]

Time : 03 Hours

Instruction to Candidates:

1)    Section – A is Compulsory.

2)    Attempt any four question from section-B.

3)    Attempt any Two questions form section –C.

Section –A

1.       

a.     What is meant by the term, critical nuclei’?

b.     Enumerate a few crystal imperfection.

c.      What is meant by atomic packing factor of a crystal structure?

d.     Discuss the main properties of the phase austenite.

e.      What is the difference in the properties of strength and hardness?

f.       What properties are required in a material to be used as a die steel?

g.     What is the purpose of hard facing?

h.     Describe the purpose of anodizing.

i.       Discuss the applications of polymers in automotive applications.

j.       What type of material is selected for radiators?

Section –B

2.     With the help of neat and labeled diagram, explain the phenomenon of twining.

3.     What are type III binary alloy systems? Why are they referred to as eutectic systems. Draw a neat and labeled diagram (phase diagram) for any type III alloy system.

4.     Discuss the role of alloying elements present in stainless steels.

5.     Discuss the procedural steps involved in induction hardening of medium carbon steels.

6.     How is selection of materials done under conditions of cryogenic wear and corrosion.

Section-C

7.     Draw a neat and labeled Iron-Iron carbide equilibrium diagram. Mark all the critical temperature lines on this diagram. Discuss the properties of phases ferrite and cematite.

8.      What is the need of normalizing heat treatment. Discuss the procedure of this treatment for low carbon steels. How is this process different form full annealing.

9.     Discuss the criteria for selecting materials for the following automotive components:

a.     Cylinder head.

b.     Bearings.

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Automotive Materials And Metallurgy Question Paper of 3rd Semester AE Download Previous Years Question Paper 1

Roll no……………..

Total no. of Questions:09]

B.Tech. (sem.-3^rd)

AUTOMOTIVE MATERIALS AND METALLURGY

SUBJECT CODE: AE-207

PAPER ID:[A0705]

Time : 03 Hours

Instruction to Candidates:

1.     SECTION-A is compulsory consisting of Ten question carrying Two marks each.

2.     SECTION-B contains FIVE questions carrying Five marks each and students has to attempt any four questions.

3.     SECTION –C contains Three questions carrying Ten marks each and students has to attempt any Two questions.

Section- A

1.     Write briefly:

a.     Explain the term crystal imperfections.

b.     What are Miller Indices? Explain with the help of an example.

c.      How phase diagrams are classified?

d.     Name any two commercial alloys of copper.

e.      What are main objectives of heat treatment?

f.       Why aluminum is highly corrosion resistant in many environments?

g.     What is the significance of surface coating of automotive components?

h.     What are the most important factors affecting selection of materials for cylinder block of an automobile?

i.       What is the specific use of polymer materials in automobiles?

j.       What is the specific use of polymer materials in automobiles?

Section –B

2.     What is plastic deformation of metals? Explain the process of plastic deformation of metals by twining.

3.     Plot and explain an equilibrium diagram for alloys having unlimited mutual solubility of components A and B in the solid state.

4.     What are the common alloying elements used for stainless steel and explain their effect on the properties of stainless steel?

5.     Why is normalizing done? Explain the process of normalizing for automotive components.

6.       

a.     What type of materials are used for piston and piston ring?

b.     Enumerate the main application sof ceramic materials in automobile.

Section –C

7.     Explain the process of recovery, recrystallization and grain growth with respect of plastic deformation of metals.

8.     Construct a neat Iron-Carbon equilibrium diagram and explain its interpretation with help of suitable examples.

9.     Write notes on the following

a.     Thermal spray coating.

b.     Hard facing.

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