III B.Tech I Semester Supplementary Examinations,June 2010 HEAT TREATMENT TECHNOLOGY Metallurgy And Material Technology Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. Distinguish among the following:
(b) Upper bainite and lower bainite (c) Ms temperature and Mf temperature.
ld .
(a) Martempering and austempering
[6+5+5]
2. (a) Discuss the important characteristics of maraging steels?
[7+9]
or
(b) Mention different types of stainless steels and explain them fully?
3. (a) What is plasma carburising? How is methane gas ionized to cause carburizing? What are the advantages and limitation of plasma carburizing?
uW
(b) What is the necessity of heat treatment after carburizing? Explain. On what factors does the heat treatment depend? Discuss what is double heat treatment. [8+8] 4. (a) Discuss the functions of Nickel in maraging steels. (b) What is the difference in heat treatment between 18% Ni and the 25% Nickel maraging steels? (c) Explain why the maraging steels have excellent fracture toughness values. [4+6+6]
nt
5. (a) Why is copper a suitable material for automobile radiators? (b) Why aluminium alloy 2017 rivets have to be refrigerated until used? Explain. (c) Why are the Cu-Zinc alloys are not age-hardneable. Discuss.
Aj
(d) Why various combinations of stregth, ductility can be obtained in Alpha-Beta titanium alloys. [4+4+4+4]
6. (a) Give the classification of steels based on carbon content and alloy content. (b) Define and explain the term tempering. Explain the affect of various alloying elements on tempering process. [8+8]
7. (a) What are the factors which control graphitization in cast irons? Explain them. (b) What is equivalent carbon in cast irons? What is the significance of equivalent carbon? How is it determined. (c) Explain the factors that influence the microstructure of cast irons.
1
[6+6+4]
Code No: R05311803
R05
Set No. 2
8. (a) With the help of a neat sketch explain the working of a bottom loading vacuum furnace. What are its advantages and limitation compared to other types of vacuum furnaces? (b) What are the commonly used heating elements? Give the maximum temperatures for which they can be used. [12+4]
Aj
nt
uW
or
ld .
in
?????
2
Code No: R05311803
R05
Set No. 4
1. (a) Why is copper a suitable material for automobile radiators?
in
III B.Tech I Semester Supplementary Examinations,June 2010 HEAT TREATMENT TECHNOLOGY Metallurgy And Material Technology Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
(b) Why aluminium alloy 2017 rivets have to be refrigerated until used? Explain.
ld .
(c) Why are the Cu-Zinc alloys are not age-hardneable. Discuss.
(d) Why various combinations of stregth, ductility can be obtained in Alpha-Beta titanium alloys. [4+4+4+4]
or
2. (a) What is plasma carburising? How is methane gas ionized to cause carburizing? What are the advantages and limitation of plasma carburizing?
(b) What is the necessity of heat treatment after carburizing? Explain. On what factors does the heat treatment depend? Discuss what is double heat treatment. [8+8] 3. (a) Discuss the functions of Nickel in maraging steels.
uW
(b) What is the difference in heat treatment between 18% Ni and the 25% Nickel maraging steels? (c) Explain why the maraging steels have excellent fracture toughness values. [4+6+6] 4. Distinguish among the following:
(a) Martempering and austempering
nt
(b) Upper bainite and lower bainite
(c) Ms temperature and Mf temperature.
[6+5+5]
5. (a) Discuss the important characteristics of maraging steels? [7+9]
Aj
(b) Mention different types of stainless steels and explain them fully?
6. (a) Give the classification of steels based on carbon content and alloy content. (b) Define and explain the term tempering. Explain the affect of various alloying elements on tempering process. [8+8]
7. (a) What are the factors which control graphitization in cast irons? Explain them. (b) What is equivalent carbon in cast irons? What is the significance of equivalent carbon? How is it determined. (c) Explain the factors that influence the microstructure of cast irons.
3
[6+6+4]
Code No: R05311803
R05
Set No. 4
8. (a) With the help of a neat sketch explain the working of a bottom loading vacuum furnace. What are its advantages and limitation compared to other types of vacuum furnaces? (b) What are the commonly used heating elements? Give the maximum temperatures for which they can be used. [12+4]
Aj
nt
uW
or
ld .
in
?????
4
Code No: R05311803
R05
Set No. 1
in
III B.Tech I Semester Supplementary Examinations,June 2010 HEAT TREATMENT TECHNOLOGY Metallurgy And Material Technology Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) What is plasma carburising? How is methane gas ionized to cause carburizing? What are the advantages and limitation of plasma carburizing?
ld .
(b) What is the necessity of heat treatment after carburizing? Explain. On what factors does the heat treatment depend? Discuss what is double heat treatment. [8+8]
or
2. (a) With the help of a neat sketch explain the working of a bottom loading vacuum furnace. What are its advantages and limitation compared to other types of vacuum furnaces? (b) What are the commonly used heating elements? Give the maximum temperatures for which they can be used. [12+4] 3. (a) What are the factors which control graphitization in cast irons? Explain them.
uW
(b) What is equivalent carbon in cast irons? What is the significance of equivalent carbon? How is it determined. (c) Explain the factors that influence the microstructure of cast irons.
[6+6+4]
4. (a) Discuss the functions of Nickel in maraging steels. (b) What is the difference in heat treatment between 18% Ni and the 25% Nickel maraging steels?
nt
(c) Explain why the maraging steels have excellent fracture toughness values. [4+6+6]
5. (a) Discuss the important characteristics of maraging steels? (b) Mention different types of stainless steels and explain them fully?
[7+9]
Aj
6. (a) Why is copper a suitable material for automobile radiators? (b) Why aluminium alloy 2017 rivets have to be refrigerated until used? Explain. (c) Why are the Cu-Zinc alloys are not age-hardneable. Discuss.
(d) Why various combinations of stregth, ductility can be obtained in Alpha-Beta titanium alloys. [4+4+4+4]
7. Distinguish among the following: (a) Martempering and austempering (b) Upper bainite and lower bainite 5
R05
Set No. 1
(c) Ms temperature and Mf temperature.
[6+5+5]
Code No: R05311803
8. (a) Give the classification of steels based on carbon content and alloy content. (b) Define and explain the term tempering. Explain the affect of various alloying elements on tempering process. [8+8]
Aj
nt
uW
or
ld .
in
?????
6
Code No: R05311803
R05
Set No. 3
in
III B.Tech I Semester Supplementary Examinations,June 2010 HEAT TREATMENT TECHNOLOGY Metallurgy And Material Technology Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) Give the classification of steels based on carbon content and alloy content.
ld .
(b) Define and explain the term tempering. Explain the affect of various alloying elements on tempering process. [8+8] 2. (a) What is plasma carburising? How is methane gas ionized to cause carburizing? What are the advantages and limitation of plasma carburizing?
or
(b) What is the necessity of heat treatment after carburizing? Explain. On what factors does the heat treatment depend? Discuss what is double heat treatment. [8+8] 3. (a) What are the factors which control graphitization in cast irons? Explain them. (b) What is equivalent carbon in cast irons? What is the significance of equivalent carbon? How is it determined.
uW
(c) Explain the factors that influence the microstructure of cast irons.
[6+6+4]
4. (a) Discuss the important characteristics of maraging steels? (b) Mention different types of stainless steels and explain them fully?
[7+9]
5. (a) Why is copper a suitable material for automobile radiators? (b) Why aluminium alloy 2017 rivets have to be refrigerated until used? Explain. (c) Why are the Cu-Zinc alloys are not age-hardneable. Discuss.
nt
(d) Why various combinations of stregth, ductility can be obtained in Alpha-Beta titanium alloys. [4+4+4+4]
6. (a) Discuss the functions of Nickel in maraging steels.
Aj
(b) What is the difference in heat treatment between 18% Ni and the 25% Nickel maraging steels? (c) Explain why the maraging steels have excellent fracture toughness values. [4+6+6]
7. Distinguish among the following: (a) Martempering and austempering (b) Upper bainite and lower bainite (c) Ms temperature and Mf temperature.
7
[6+5+5]
Code No: R05311803
R05
Set No. 3
8. (a) With the help of a neat sketch explain the working of a bottom loading vacuum furnace. What are its advantages and limitation compared to other types of vacuum furnaces? (b) What are the commonly used heating elements? Give the maximum temperatures for which they can be used. [12+4]
(b) What is the necessity of heat treatment after carburizing? Explain. On what ... (b) What is the difference in heat treatment between 18% Ni and the 25% Nickel.
[16] · 4. What are channel,circuit and half circuit in the context of satellite telemetry sys- .... 3. Describe the conditions for total internal reflection within a fibre. [16].
(b) Describe a DC Servo Motor with a neat sketch. [8+8] · 4. (a) What is a timing belt? Discuss the use of Timing belts in power transmission? (b) Discuss various ...
(b) Consider any two networks of your choice which support Circuit switching or ... (b) Which is more efficient, circuit switching or packet switching? Why?
(a) What is the difference between logical I/O and device I/O? (b) Explain feed back scheduling policy. [8+8] · 2. (a) How can logical address space be ...
kerosene, and fuel oil must be limited as also shown in this table. There are no ... equipment is a function of x, the size (horsepower ) of the motor, namely.
(b) What is meant by displacement function? (c) Give the importance of Pascal Triangle. [4+6+6] · 3. Determine the displacements at nodes and the stresses in ...
The horizontal distance between u/s face and center line of drain holes is 8 m. ... (c) Cut-off trench ... Bed width of parent channel U/S / D/S = 45 m/40 m. [16].
Also draw the relevant circuit diagram. (b) Draw the resistive model of a CMOS inverter and explain its behavior for. LOW and HIGH outputs. [8+8]. 8. (a) It is necessary to identify the position of mechanical disk, when rotates with a step of 450. Gi
4. Give the syntax for 'awk'. Discuss about the selection criteria in awk. How to · embed action in to this command. Explain with examples. [16] · 5. Write about different Unix locking techniques. [16] · 6. (a) What are the differences between shell
of Rs. 1,500 would be deposited in this fund under an ordinary annuity plan. All · money in the fund can be .... (b) Discounted cash flow · (c) Net present worth ... would last for 10 years. A worn-out storage tank of capacity equivalent to the new.
R05. Set No. 2. III B.Tech I Semester Examinations,May 2011 · WEB TECHNOLOGIES · Information Technology ... that describes your college. The paragraph ...
is subjected to a load of 200 kN, find the stresses developed in the two materials. ... Compare the values of max. and minimum hoop stresses for a cast steel ...
The cores of two identical transformers A and B carry alternating fluxes whose instantaneous values are (0.01 sin 314t)W and 0.012 (1.1 sin 628t+0.1 sin 1884t).
(a) Explain live node, E-node and dead node with an example. (b) Explain the method of reduction to solve TSP problem using Branch and · Bound. [8+8] · 3. (a) Prove that Prim's algorithm finds a minimum spanning tree. (b) Explain the single source sh
at 0.8 p.f. lagging and 15A at 0.6 p.f. lagging respectively, both expressed ... (b) A single-phase motor takes a current of 10 amps at a p.f. of 0.707 lagging.
If the tensile stress is not to exceed 17MPa, find the safe. u.d.l. which the beam can carry. Also find maximum compressive stress. Draw the sketch showing the ...
