Showing posts with label 16 marks. Show all posts
Showing posts with label 16 marks. Show all posts

Saturday, 14 November 2015

ME6503 Design of machine elements important questions

ANNA UNIVERSITY CHENNAI
REGULATION 2013
ME6503-DESIGN OF MACHINE ELEMENTS
       UNIVERSITY QUESTIONS  
UNIT-IV
PART-A


1. Define surge in a spring?

2. What is nipping of a leaf spring?

3. Define the term fluctuation of energy with reference to flywheels.

4. What is meant by semi elliptical leaf springs?

5. A helical spring of rate 12N/mm is mounted on the top of another spring of rate 8 N/mm. find

the force required to give a deflection of 50mm.

6. What is the purpose of flywheel that is used in an IC engine?

7. What is constant width and constant strength springs?

8. Define spring index.

9. What is Wahl factor and why is it required?

10. What is the objective of the nipping of the leaf spring?

11. Write the advantage of Belleville spring.

12. Write the formula for natural frequency of spring.

13. How does the function of flywheel differ from that of governor?

14. In what respect the flywheel differs from the governor.

15. What type of external forces act on connecting rod?

Part – B

1. A safety valve, 50mm in diameter, is to blow off at a pressure of 1.5 MPa. It is held on its seat by means of a helical compression spring, with an initial compression spring, with an initial compression of 25mm. the maximum lift of valve is 10mm. the spring index can be taken as 6.   The spring is made of patented and cold drawn steel wire with ultimate strength of 1500N/mm²and modulus of rigidity of 81370N/mm². The permissible shear stress for thespring wire should be taken as 30% of the ultimate strength. Design the spring and calculate :

(i) Wire diameter;

(ii) Mean coil diameter;

(iii) Number of active turns;

(iv) Total number of turns;

(v) Solid length of spring;

(vi) Free length of spring;

(vii) Pitch of the coil.     

2. A helical compression spring is used to absorb the shock. The initial compression of the spring is 30mm and it is further compressed by 50mm while absorbing the shock. The spring is to absorb 250J of energy during the process. The spring index can be taken as 6. The spring is made up of patented and cold drawn steel wore with an ultimate tensile strength of 1500N/mm² and modulus of rigidity of 81 kN/mm². The permissible shear stress for the spring wire should be taken us 30% of the ultimate strength. Design the spring and calculate :

(i) Wire diameter

(ii) Mean coil diameter

(iii) Number of active turns

(iv) Free length &


3. Design a helical spring for a spring loaded safety valve (Ramsbottom safety valve) for the following conditions: Diameter of valve seat = 65mm; Operating pressure = 0.7 N/mm²; Maximum pressure when the valve blows off freely = 0.75 N/mm²; Maximum lift of the valve when the pressure rise from 0.7 to o.75 N/mm² =3.5 mm; Maximum allowable stress= 550MPa; Modulus of rigidity = 84 kN/mm²; Spring index = 6.

4. Design a cast iron flywheel used for a four stroke.  I.C engine developing 180 kW at 240r.p.m. The hoop or centrifugal stress developed in the flywheel is 5.2 MPa, the total fluctuation of speed is to be limited to 3% of the mean speed. The work done during the power stroke is 1/3 more than the average work done during the whole cycle. The maximum torque on the shaft is twice the mean torque. The density of cast iron is 7220 kg/m³.

5. A Spring loaded safety valve for a boiler is required to blow off at a pressure 1.5N/mm².The diameter of the valve is 60 mm. Design a suitable compression spring for the safety valve, assuming spring index to be 6 and 25 mm initial compression. The maximum lift of the valve is 15 mm. The shear stress in the spring material is to be limited to 450 Mpa. Take G=0.84 Mpa.

6. A Multi cylinder engine is to run at a constant load of 600 rpm. On drawing the crank effort diagram to scale of 1 mm=250 N-m and 1 mm ,the areas in square mm above and below the mean torque line were measured and found to be in order +160,-172,+168,-191,+197,and -162.The speed is to be kept within ±1% of the mean speed of the engine. Determine the moment of inertia of the flywheel.

7. A Closed coil helical compression spring has plain ends and is to fit over a 25 mm diameter rod. When a compressive force of 100 N is applied to the spring it compressed by 50 mm. If the spring has a perfect wire diameter of 4mm, and the spring material has a maximum allowable shear stress of 180 MN/ and a modulus of rigidity81GN/m2.Determine,                                                                                                                                                  a) the mean coil diameter of the spring. (b)The diametrical clearance between the spring and the rod. c) The number of coil in the spring. (d)The solid length of the spring.

8. The areas of the turning moment diagram for one revolution of a multi cylinder engine with reference to the mean turning moment, below and above the line are -32,+408,-267,+333,-310,+226,-374,±260 and -244.The scale for abscissa ordinate are:1mm= and 1mm=650 N-m respectively.The mean speed is 300 rpm with a percentage speed fluctuation of ±1.5%.If the hoop stress in the material of the is not to exceed 5.6 Mpa, determine the suitable diameter and cross section for the flywheel, assuming that the width is equal to 4 times the thickness. The density of the material may be taken as 7200 Kg/.Neglect the effect of the boss and arms.

9. Design a closed coiled helical compression spring for a load range varying from 2.25 KN to 2.75 KN and corresponding axial deflection of 6mm.Spring index is 5.Permissible shear stress is 400 N/ and modulus of rigidity is 80 KN/.

10. The turning moment diagram of an engine has areas above and below the mean torque line of +530,-330, +380,-470,+180,-360,+350 and -280 sq.mm. The scales of the diagram are:Turning moment 1mm=1000 N-m, Crank angle=1mm=.The mean speed is 150 rpm and the total fluctuation of speed is not to exceed 3% of the mean speed. Design a suitable flywheel.

11. A Helical compression spring made of oil tempered carbon steel is subjected to a load which varies from 400 N to 1000N.The spring index is 6 and the design factor of safety is 1.25.If the yield stress in shear is 770 MPa and endurance stress in shear is 350 MPa, find (a) Size of the spring wire, (b) Diameter of the spring, (c) Number of turns of the spring, (d) Free length of the spring. The compression of the spring at the maximum load is 30 mm. The modulus of rigidity for the spring material may be taken as 80 KN/.

12. A Single cylinder double acting steam engine delivers 185 kW at 100 rpm. The maximum fluctuation of energy per revolution is 15% of the energy developed per revolution. The speed variation is limited to 1% either way from the mean. The mean diameters of rim are 2.4m.Design and draw two views of flywheel.

13. Determine the dimensions of an I section connecting rod for a petrol engine from the following data: Diameter of piston=110mm, Mass of reciprocating parts=2Kg, Length of the connecting rod from centre to centre = 325 mm,Stroke length=150mm,R.P.M=1500 with possible over speed of 2500, Compression ratio=4:1, Maximum explosion pressure=2.5 N.

14. The turning moment diagram of a multi – cylinder engine is drawn with a scale of (1mm= 1˚) on the abscissa and (1mm = 250 N-m) on the ordinate. The intercepted areas between the torque developed by the engine and the mean resisting torque of the machine, taken in order from one end are -350, +800, +600, +900, -550, +450 and -650mm². The engine is running at a mean speed of 750rpm and the coefficient of speed fluctuations is limited to 0.02. A rimmed flywheel made of grey cast iron FG 200(p= 7100 kg/m³) is provided. The spokes, hub and shaft are assumed to contribute 10% of the required moment inertia. The rim has rectangular cross section and ratio of width to thickness is 1.5. Determine the dimensions of rim.

15. Design a suitable connection rod for a petrol engine for the following details. Diameter of the piston =100 mm; Weight of reciprocating parts per cylinder =20 N; Connecting rod length =300 mm; Compression ratio =7:1; Maximum explosive pressure = 3N/mm²; Stroke = 140mm; Speed of the engine = 2000 r.p.m.

16. The following data is given for a rimmed flywheel made of grey cast iron FG 200:

 Mean radius of the rim = 1.5 m

 Thickness of rim          = 200 mm

 Width of rim  = 300 mm

 Number of spokes            = 6

 Cross sectional area of the each spoke = 10000 mm²

Speed of rotation               = 720 rpm

Calculate:

(i) The tensile stress in rim at = 30˚ and  = 0˚

(ii) The axial stress in each spoke

(iii) The mass density of cast iron FG 200 is 7100 kg/m³

For all the units of DME and other mechanical engineering subjects study materials is uploaded see right side of the page you can download whatever materials you need to study or copy and paste the following link :annaunivstudymaterials.blogspot.com
Posted by at No comments:
Labels: , , ,

ME6503-DESIGN OF MACHINE ELEMENTS PREVIOUS QUESTIONS

ANNA UNIVERSITY CHENNAI
REGULATION 2013
ME6503-DESIGN OF MACHINE ELEMENTS
                                 UNIVERSITY QUESTIONS 
                                                                                                                                                                                                                                    Click: DME Unit 1 Question Bank
Click: DME Unit 5 Question Bank

 UNIT-2                                                                                                                                                       TWO MARKS
1. On what basis are shafts designed?

2. What are the effects of introducing keyways in shafts?

3. What is the use of register in a flange coupling?

4. How is the strength of a shaft affected by the Keyway?

5. What are the various stresses induced in the shafts?

6. Name any two of the rigid coupling.

7. A shaft of 70mm long is subjected to shear of 40 MPa and has an angle of twist equal to 0.017 radian.Determine the diameter of the shaft. Take G = 80 GPa.

8. What is the main use of woodruff keys?

9. Why a hollow shaft has greater strength and stiffness than solid shaft of equal weight?

10. Under what circumstances flexible couplings are used?

11. What are the various stresses induced in the shafts?

12. Name the two of the rigid coupling.

13. What is the difference between rigid and flexible coupling?

14. Classify keys with its applications.

15. Write the advantages of the knuckle joints.

16. State Castiglione's theorem.

Click: DME Unit 5 Question Bank

 16 MARKS

1. A hollow transmission shaft having inside diameter 0.6times the outside diameter is made of plain carbon steel 40C8 and the factor of safety is 3. A belt pulley, 1000mm in diameter, is mounted on the shaft which overhangs the left hand bearing by 250mm.The belts are vertical and transmit power to the machine shaft below is 3kN and 1 kN respectively, while the weight of the pulley is 500N. The angle of wrap of the belt on the pulley is 180o. Calculate the outside and inside diameter of the shaft.

2. The layout of a shaft carrying two pulleys 1 and 2, and supported on two bearings A and B is shown in figure. The shaft transmits 7.5 k W power at 360 rpm from pulley 1 to pulley 2. The diameters of pulley 1 and 2 are 250 mm and 500 mm respectively. The masses of pulley 1 and 2 are 10 and 30 kg respectively. The belt tensions act vertically downward and ratio of belt tensions on the tight side to slack side for each pulley are 2.5:1. The shaft is made of plain carbon steel 40 C8 (Syt) = 380 N / mm2) and the factor of safety is 3. Estimate suitable diameter of shaft. If the permissible angel of twist is 0.5° per meter length, calculate the shaft diameter on the basis of tensional rigidity. Assume G = 79300 N / mm2

3. A steel solid shaft transmitting 15 kW at 200 rpm is supported on two bearings 750 mm apart and has two gears keyed to it. The pinion having 30 teethes of 5mm module is located 100mm to the left of the right hand bearings and delivers power horizontally to the right. The gear having 100 teeths of 5 mm module is located 150 mm to the right of the left hand bearing and receives power in a vertical direction from below. Using an allowable stress of 54 MPa in shear. Determine the diameter of the shaft.

4. A steel solid shaft transmitting 15 kW at 200 rpm is supported on two bearings 750 mm apart and has two gears keyed to it. The pinion having 30 teeths of 5mm module is located 100mm to the left of the right hand bearings and delivers power horizontally to the right. The gear having 100 teeths of 5 mm module is located 150 mm to the right of the left hand bearing and receives power in a vertical direction from below. Using an allowable stress of 54 MPa in shear. Determine the diameter of the shaft.

5. A horizontal nickel steel shaft rests on two bearings, A at the left and B at the right end and carrier two gears C and D located at distance of 250 mm and 400 mm respectively from the centre line of the left and right bearings. The pitch diameter of the gear C is 600 mm and that of gear D is 200 mm. The distance between the centre line of the bearing is 2400 mm. The shaft transmits 20kW at 120 rpm. The power is delivered to the shaft at  gear C and is taken out at gear D in such a manner that the tooth pressure Ftc of the gear C and Ftd of the gear D act vertically downwards.
6. Find the diameter of the shaft, if the working stress is 100MPa in tension and 56 MPa in shear. The gear C and D weights 950 N and 350 N respectively. The combined shock and fatigue factors for bending and torsion maybe taken as 1.5 and 1.2 respectively.

7. A hollow shaft for a rotary compressor is to be designed to transmit a maximum torque of 3500 N-m. The shear stress in the shaft is limited to 50Mpa.Determine inside and outside diameter of the shaft, if the ratio of inside and outside diameter is 0.4.

8. A hoisting drum 0.5 m in diameter is keyed to a shaft which is supported in two bearings and driven through a 12:1 reduction ratio by an electric motor. Determine the power of the driving motor, if the maximum load of 8 kN is hoisted at a speed of 50 m/min and the efficiency of the drive is 80%. Also determine the torque on the drum shaft and the speed of the motor in rpm. Determine also the diameter of the shaft made of machinery steel, the working stresses of which are 155 MPa in tension and 50 MPa in shear. The drive gear whose diameter is 450 mm is mounted at the end of the shaft such that it overhangs the nearest bearing by 150 mm . The combined shock and fatigue for bending and torsion may be taken as 2 and 1.5 respectively

9. A rigid type of coupling is used to connect two shafts transmitting 15kW at 200 rpm. The shaft keys and bolts are made of C45 steel and the coupling is cast iron. Design the coupling.

10. A turbine shaft transmits 500kw at 900 rpm. The permissible shear stress is 80 N/mm^2 while twist is limited to 0.5 degree in a length of 2.5 m. calculate the diameter of the shaft. take G=0.8 *105 N/mm2. if the shaft chosen as hollow with d3/d03 = 0.6. Calculate the percentage of saving in material.

11. Determine the dimension of flange coupling that connects a motor and a pump shaft. The power to be transmitted a 2 kW at a shaft speed of 960 rpm. Select suitable materials for the parts of the coupling and list the dimensions.

12. Design a muff coupling to connect two steel shafts transmitting 25 kW power at 360 rpm. The shafts and key are made of plain carbon steel 30C8.The sleeve is made of grey cast iron FG 200.The factor of safety is the shaft and key is 4.Foe example the sleeve ,the factor of safety is 6 based ultimate strength.

13. Determine the dimension of flange coupling that connects a motor and the pump shaft. The power to be transmitted a 2kW at a shaft speed 960 rpm. Select suitable materials for the parts of the coupling and the dimensions.

14. A hoisting drum 0.5 m in diameter is keyed to a shaft which is supported in two bearings and driven through a 12:1 reduction ratio by an electric motor. Determine the power of the driving motor, if the maximum load of 8 kN is hoisted at a speed of 50 m/min and the efficiency of the drive is 80%. Also determine the torque on the drum shaft and the speed of the motor in rpm. Determine also the diameter of the shaft made of machinery steel, the working stresses of which are 155 MPa in tension and 50 MPa in shear. The drive gear whose diameter is 450 mm is mounted at the end of the shaft such that it overhangs the nearest bearing by 150 mm. The combined shock and fatigue for bending and torsion may be taken as 2 and 1.5 respectively

15. Design a bushed-pin type of flexible coupling to connect a pump shaft to a motor shaft transmitting 32kW at 960 rpm. The overall torque is 20% more than mean torque. The material properties are as follows:
(i) The allowable shear and crushing stress for shaft and key material is 40 MPa and 8-MPa respectively.(ii) The allowable shear stress for cast iron is 15 MPa(iii) The allowable bearing pressure for rubber is 0.8 N/mm2(iv) The material of the pin is same as that of shafts and key.Draw neat sketch of the coupling.

16. Design a protective type flange coupling to connect two shafts to transmit 15kW at 600 rpm.
Posted by at No comments:
Labels: , , , ,

Friday, 6 November 2015

ME6502 Heat and Mass Transfer question bank



                                                 
Here Part-A (2 marks) important questions repetedly asking from the anna university chennai, which is given for 2 units namely conduction and convection. If you study well these mentionaed questions surely you can get 6-8 marks in university examinations. Make it for your reference and use for any subject study materials in this website.
Anna University, Chennai
Regulation 2013
Department of Mechanical Engineering


     Click: Unit II Convection 2 Marks with Answers

Click:Unit III Phase change Heat Transfer and Heat exchangers 2 Marks with Answers   

 Click: Unit IV Radiation 2 Marks with Answers

Click: Unit V Mass Transfer 2 Marks with Answers
   
                                           PART-A

                                     UNIT- 1   CONDUCTION

1. State Fourier's law of heat conduction.
2. What is lumped heat analysis? When is it used?
3. Define fin efficiency and fin effectiveness?
4. What do you understand by  critical radius of insulation and give it's expression.
5. Write down the three dimensional steady state equation for cartesian and Polar coordintes.
6. Write down the equation for heat transfer through composite pipes or cylinder.
7. Define overall heat transfer coefficient.
8. State the applications of fins and give it's types.
9. Define Biot number. And give it's significance.
10. What are Heisler charts?
11. Define thermal conductivity and What are the factors affecting it?
12. What is fourier number and give it's significance. 
Click: Unit I Conduction 2 Marks with Answers


                                        UNIT- 2  CONVECTION

1. What are hydro dynamic and thermal boundary layer thickness?
2. What is meant by natural and forced convection?
3. State Newton' s law of convection.
4. What are the dimensionless parameters used in forced convection?
5. Define boundary layer thickness.
6. Indicate the concepts or significance of boundary layer.
7. Define convection and write it's types.
8. Draw the velocity and temperature profiles for free convection on a hot vertical plate.
9. Define Prandl number and Grashoff number with its significance.
10. Define Reynolds number and Nusselt number with its significance.
11. Differentiate laminar and turbulent flow.
12. In which mode of heat transfer is the convection heat transfer coefficient usually higher. Why? 

Click: DME previous 5 years Anna University Questions


Click: Unit II Convection 2 Marks with Answers

Click:Unit III Phase change Heat Transfer and Heat exchangers 2 Marks with Answers

Click: Unit IV Radiation 2 Marks with Answers

For all the units of heat and mass transfer and other mechanical engineering subjects study materials such as university questions with answers, question bank, lecture notes in PPT, PDF and previous years anna university questions were uploaded in this website. See the right page of this page you can download more for your reference or go to annaunivstudymaterials.blogspot.com
Posted by at No comments:
Labels: , , , , ,

Sunday, 1 November 2015

ME6403 Engineering Materials and Metallurgy question bank


This post covers the questionbank (2 marks and 16 marks) for the subject of Engineering Materials and Metallurgy as per the regulation 2013.


 YEAR/SEMESTER:II / IV

Subject: ME6403 -Engineering Materials &Metallurgy

UNIT-I

PART-A

1. What is an alloy?

2. Define solid solution.

3. Define solute and solvent.

4. What are the different types of solid solutions?

5. Explain the Substitutional solid Solution.

6. Explain the Interstial solid Solution.

7. What is phase diagram? and its importance.

8. Differentiate between eutectic and eutectoid.

9. Differentiate between peritectic and peritectoid.

10. What is mean by "allotropy of iron"?

11. Define ferrite and austenite.

12. Define cementite, pearlite.

13. Define martensite, bainite.

14. Differentiate between steel and cast iron.

15. What is meant by hypo eutectoid, hypereutectoid steel?

16. What is meant by hypo eutectic, hyper eutectic C.I?

17. What are cooling curves?

18. Drawn the cooling curve for the pure metal, binary solid solution and binary eutectic system.


UNIT-I
PART-B

1. Discuss the similarities and differences between substitutional and interstitial solid solution?

2. What is cooling curve? How does the time temperature cooling curve of an alloy of eutectic
composition different from that of a pure metal?

3. Explain:

1. Eutectic reaction

2. Eutectoid reaction

3. Peritectic reaction

4. Peritectoid reaction

4. Draw Iron -Carbide equilibrium diagram and mark on it all salient temperature and composition fields.

5. (1) Elements A & B melt at 7000° C and 10000° C respectively. Draw a typical isomorphous
phase diagram between the elements A & 8


(2) Elements A & B melt at 7000° C & 10000° C respectively. They form a eutectic at 35%A at
temperature 5000 C. Draw a typical phase diagram between A & B

6. Metal A has melting point at 10000° C . Metal B has melting point of 5000° C. Draw one phase diagram
(between the elements A & B ) for each of the following conditions. (i)The two elements exhibit unlimited solid
solubility.

(ii)The alloy systems show formation of two terminal solid solution and a eutectic point at 50%A and at7000° C.

7. (i)Give the classification of steel.

(ii)Desirable properties and application of low, medium and high carbon steel.
(iii)What is an alloy steel? How are alloy steel classified? Explain them.


8. (i) Explain the classification of steel.

(ii)Desirable properties and application of GrayC.I, NodularC.I, WhiteC.I, MalleableC.I.


UNIT-II

PART- A

1. What is meant by "heat treatment"? and its purpose.

2 .List the various stages of a heat treatment process.

3 .A low carbon steel in the normalized condition is stronger than the same steel in the

annealed condition. Why?

4. Case carburizing heat treatment is not generally carried out for medium carbon steel. Why? ""'"

5. What is "critical cooling rate" in hardening of steel?

6. What are the factors affecting the CCR?

7. What is the microstructure of an austempered of steel? What is the advantage of austempering heat treatment?

8. What is the principle of surface hardening in induction hardening process?

9. What is the need for providing a tempering treatment after quench hardening of steel?

10. What is meant by normalizing? and its purpose.

11. Differentiate between normalizing and full annealing.

12. Differentiate between full annealing and process annealing.

13. What is quenching? List some of the quenching medium.

14. What are the factors should be considered while selecting a quenching medium?

15. What are the factors affecting the hardness?

16. What is martempering and austempering?

17. What is meant by hardnability? What are the factors affecting it?

18. What is difference between hardness and hardnability?

19. In What way cyaniding differs from carburizing?

20. In What way flame hardening differs induction hardening?

UNIT-II

PART-B

1. Define hardenability of steel .Explain the jominy end quench test used to determine

hardenability of steel. How will you draw hardenability curves this sheet?

2 Explain:
1. Annealing
2. Spheroidising
3. Normalizing
4. Hardening
3. (i) What are austempering and martempering ?What are their

purpose? (ii)Explain the steps in Case carburizing of steel.

4. Write short notes on: 1. Carburizing 2.Nitriding 3.Cyaniding 4.Carbonitriding.

5. Write short notes on (a) Flame hardening (b) Induction hardening.

6. (i)Draw the schematic isothermal transformation diagram corresponding to 0.8% of carbon
steel. (ii)Explain hardening and tempering process.


UNIT-III

PART-A

1. What are the mechanical properties of materials?

2. Distinguish between elasticity and plasticity.

3. Distinguish between brittle fracture and ductile fracture.

4. What properties are determine from tensile testing of metallic products?

5. Define endurance limit in fatigue test.

6. In general HCP metals are hard and brittle while FCC metals are soft and ductile .Why?

7. Draw the sketch of a standard specimen used for charpy V-notch impact testing.

8. Distinguish between slip and twinning.

9. How will you express the deformation characteristics of a material through tensile testing?

10. What is meant by fatigue fracture?

11. What are factors affecting fatigue strength?

12. What is meant by creep fracture?

13. What are the factors affecting the creep?

14. What is the attractive feature of Vickers hardness test?

15. How does the Rockwell test differ from that of the others?

UNIT-III

PART-B

1. (a)What are slip and twinning? What are their characteristics? 
(b)Discuss characteristics of ductile fracture and brittle fracture.

2. Explain the testing procedure for determining the following properties. (i)Brinell hardness
number (ii) Creep strength

3. Explain the testing procedure of

(i)Vickers hardness test (ii) lzod impact test

4. Explain the testing procedure of (i) Rockwell hardness test (ii) Charpy impact test

5. (a) Explain the mechanism of plastic deformation of metals by slip and
twinning. (b )Explain testing procedure for Fatigue test
6. Explain the testing procedure of (i) Tensile test (ii) Creep test




UNIT-IV

PART-A

1. What are the effects of Cr and Mo in low alloy steels?

2. What are the effects of Mn and Si in low alloy steels?

3. What are the effects of V and W in low alloy steels?

~ 4. What is the purpose of magnesium treatment in producing S.G iron?

5. What is meant by precipitation hardening?

6. What is the main strengthening mechanism in high strength aluminum alloy?

7. What is meant by stainless steel?

8. How can you classify tool steel? and its properties

9. What are HSLA steel? Where are they used?

10. What are marageing steel? Give its composition.

11. What are the main difference between brass and bronze?

12. List the types of brass.

13. What are gunmetals? and its composition.

14. What is Babbitt t metal? and its composition.

15. What are cupronickels? What is the use of Monel metal?

16. List the bearing materials that are commonly used.

17. What are the characteristics of bearing materials?




UNIT-IV

PART-B

1. Write short notes on: 1.Austinitic stainless steel

2. Ferritic stainless steel

3. Martensitic stainless steel

2. Write short notes on: 1. High speed steel

2. HSLA steel

3. Marageing steel

4. Tool steel

3. (i)What are ALPHA brass and ALPHA/BETA brass?

(ii)Discuss step involved in precipitation hardening treatment anyone aluminum alloy as example.

4. How will you classify brasses based on the composition of zinc Explain the properlies & application of
the main type of brasses


5. Write short notes on:

1. Gray C.I

2. White C.I

3. Malleable C.I

4. Spheroidal graphite CI

6. Discuss the composition, properties & typical application of any four copper alloys

7. Discuss the composition, properties & typical application of some aluminum alloys

UNIT-V

PART-A

1. What are polymers?

2. List out four attractive characteristics of polymers.

3. What is polymerization?

4. Differentiate addition and condensation polymerization.

5. Why are additives added to polymers? ';

6. Distinguish between thermoplastics and thermosetting plastics.







7. Name four ethenic polymers (polymers that have the basic monomers structure of ethylene).

8. Draw the molecular structure of polyethylene and poly propylene.

9 .Draw the molecular structure of phenol formaldehyde polymer (PF) and urea formaldehyde polymer (UF).

10. Give to example of particulate reinforced metal matrix composites and ceramic matrix composites.

11. What is the importance of alumina and silicon nitride?

12. What are the characteristics of engineering ceramics?

13. List the properties and application of PVC.

14. What are Bakelite’s? and state their application.
15Nname any four engineering ceramics.
16. What are composites?
17. How are composites materials classified?

18. List the application of composite materials.

UNIT-V

PART-B

1. Describe the molecular structure, properties and application of the following polymers.
(i)Polyvinyl chloride (PVC)    (ii)Polystyrene (PS)

(iii)Polyethylene terephthalate (PET) (iv )Poly carbonate

2. Describe the molecular structure, properties and application of the following polymeric materials.

(i)Poly methyl methacrylate (PMMA)

(ii)Poly tetra f1uoro ethylene (PTFE)

(iii)Polyethylene terephthalate (PET)

(iv)Acryl nitride butadiene styrene.

3. Describe the molecular structure, properties and application of the following

polymers. (i)Polypropylene (PP)

(ii) Polyvinyl chloride (PVC)

(iii) Poly tetra f1uoro ethylene (PTFE) (iv)Poly ethylene perethalate.

4. Describe the properties and application of the following ceramics materials
(i)Alumina

(ii)Silicon carbide
(iii)Silicon nitride
(iv)Sialon.

5. Write short notes about the different types of matrix materials and reinforced materials used to make

polymers matrix composites. 



Posted by at No comments:
Labels: , , , , , ,
Subscribe to: Posts (Atom)