III B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 MECHANICAL UNIT OPERATIONS Chemical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) With the help of neat sketches briefly discuss about forward extrusion and backward extrusion.
ld .
(b) With the help of neat sketches, explain the effect of semi cone angles on extruding force and discuss the mode of flow of material. [8+8] 2. (a) Briefly explain “Butt-welding” and “seam welding”?
(b) With the help of a neat sketch explain the principle of Spot welding?
[8+8]
or
3. (a) Discuss the features of explosive forming method.
(b) Explain the magnetic-pulse forming process with its merits and demerits.[8+8]
uW
4. (a) How does a cold chamber die casting machine differs from a hot chamber machine? Explain the working of a cold chamber machine with the help of a diagram. (b) What precautions should one take while choosing chills? Explain
[12+4]
5. (a) Explain the following tests conducted on welds i. Radiographic testing ii. Ultrasonic testing
(b) What are the various heads of costs in calculating the weld cost? Explain.
nt
[8+8]
6. Differentiate between Arc and Gas welding with respect to the principle, operation application and limitations? [16] 7. (a) What are the advantages of forging of metals?
Aj
(b) What are the main characteristics of the hot forging as compared with cold forging? [8+8]
8. (a) Explain the importance of using metal as pattern material. (b) Why is coarser sand is better for steel castings than fine grained sand? Why is it that as castings increase in size, it is often better to use increasingly coarser sand? [8+8] ?????
1
Code No: 25023
RR
Set No - 2
1. (a) Explain the following tests conducted on welds
ld .
i. Radiographic testing ii. Ultrasonic testing
in
III B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 MECHANICAL UNIT OPERATIONS Chemical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
(b) What are the various heads of costs in calculating the weld cost? Explain.
[8+8]
2. (a) Briefly explain “Butt-welding” and “seam welding”?
or
(b) With the help of a neat sketch explain the principle of Spot welding?
[8+8]
3. (a) How does a cold chamber die casting machine differs from a hot chamber machine? Explain the working of a cold chamber machine with the help of a diagram.
uW
(b) What precautions should one take while choosing chills? Explain
[12+4]
4. (a) What are the advantages of forging of metals? (b) What are the main characteristics of the hot forging as compared with cold forging? [8+8] 5. Differentiate between Arc and Gas welding with respect to the principle, operation application and limitations? [16]
nt
6. (a) Explain the importance of using metal as pattern material. (b) Why is coarser sand is better for steel castings than fine grained sand? Why is it that as castings increase in size, it is often better to use increasingly coarser sand? [8+8]
Aj
7. (a) Discuss the features of explosive forming method. (b) Explain the magnetic-pulse forming process with its merits and demerits.[8+8]
8. (a) With the help of neat sketches briefly discuss about forward extrusion and backward extrusion. (b) With the help of neat sketches, explain the effect of semi cone angles on extruding force and discuss the mode of flow of material. [8+8] ?????
2
Code No: 25023
RR
Set No - 3
1. (a) Explain the following tests conducted on welds
ld .
i. Radiographic testing ii. Ultrasonic testing
in
III B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 MECHANICAL UNIT OPERATIONS Chemical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
(b) What are the various heads of costs in calculating the weld cost? Explain.
[8+8]
or
2. (a) With the help of neat sketches briefly discuss about forward extrusion and backward extrusion.
(b) With the help of neat sketches, explain the effect of semi cone angles on extruding force and discuss the mode of flow of material. [8+8]
uW
3. Differentiate between Arc and Gas welding with respect to the principle, operation application and limitations? [16] 4. (a) Briefly explain “Butt-welding” and “seam welding”? (b) With the help of a neat sketch explain the principle of Spot welding?
[8+8]
5. (a) Discuss the features of explosive forming method. (b) Explain the magnetic-pulse forming process with its merits and demerits.[8+8]
nt
6. (a) How does a cold chamber die casting machine differs from a hot chamber machine? Explain the working of a cold chamber machine with the help of a diagram. (b) What precautions should one take while choosing chills? Explain
[12+4]
7. (a) Explain the importance of using metal as pattern material.
Aj
(b) Why is coarser sand is better for steel castings than fine grained sand? Why is it that as castings increase in size, it is often better to use increasingly coarser sand? [8+8]
8. (a) What are the advantages of forging of metals? (b) What are the main characteristics of the hot forging as compared with cold forging? [8+8] ?????
3
Code No: 25023
RR
Set No - 4
1. (a) What are the advantages of forging of metals?
in
III B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 MECHANICAL UNIT OPERATIONS Chemical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
ld .
(b) What are the main characteristics of the hot forging as compared with cold forging? [8+8] 2. (a) With the help of neat sketches briefly discuss about forward extrusion and backward extrusion.
or
(b) With the help of neat sketches, explain the effect of semi cone angles on extruding force and discuss the mode of flow of material. [8+8]
3. (a) How does a cold chamber die casting machine differs from a hot chamber machine? Explain the working of a cold chamber machine with the help of a diagram. (b) What precautions should one take while choosing chills? Explain
[12+4]
uW
4. Differentiate between Arc and Gas welding with respect to the principle, operation application and limitations? [16] 5. (a) Explain the importance of using metal as pattern material. (b) Why is coarser sand is better for steel castings than fine grained sand? Why is it that as castings increase in size, it is often better to use increasingly coarser sand? [8+8]
nt
6. (a) Explain the following tests conducted on welds i. Radiographic testing ii. Ultrasonic testing
(b) What are the various heads of costs in calculating the weld cost? Explain.
Aj
[8+8]
7. (a) Briefly explain “Butt-welding” and “seam welding”? (b) With the help of a neat sketch explain the principle of Spot welding?
[8+8]
8. (a) Discuss the features of explosive forming method. (b) Explain the magnetic-pulse forming process with its merits and demerits.[8+8] ?????
(b) With the help of neat sketches, explain the effect of semi cone angles on extruding force and discuss the mode of flow of material. [8+8]. *****. 2. AjntuWorld.in ...
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