Viva Voice
SHEET METAL SECTION (The Answers will be hidden by today 10 PM 15/09/2021)
1. What is meant by sheet metal? How a sheet is distinguished from plate?
4. What is meant by GI sheet? - Galvanized iron sheet
5. How G I sheet is manufactured - By passing the sheet through molten zinc
6. Why G I sheet metal should not be welded? - Poisonous gas will be produced at elevated temperature
7. What is the included angle of prick punch? - 30 to 60 degree
8. Name the tools used to cut sheet metal - snips, shear, nippers
9. What is the purpose of Scribers? - For drawing lines over metallic objects.
10. Can you tell the name of material used for making the surface plate? And tell why steel can’t be used for making surface plate. - Cast iron or granite - The friction should be minimum and should be durable.
11. What is meant by soldering? Where it is used in sheet metal? - soldering is the process of joining the metal with solder to make the item leak proof
12. What is the least count of a steel rule? - Usually 1 mm, in certain steel rules it will be 1/2 mm
13. How many mm is one inch? 25.4 mm
14. What is the name of supporting tool used in sheet metal shop? - Stakes
15. What is the name of tool used to press the locked up seam? - Groover
16. What is meant by solid punch? What is the purpose of solid punch - solid punch is used to make hole in thin sheets
17. How a sheet metal is specified? - The material by which it is made, the thickness and the size of the sheet
18. What is meant by SWG? - Standard wire Gauge. It is used to measure the diameter of wire and the thickness of the sheets
19. Tell the various methods of jointing the sheet metal
20. What is the advantage of hollow punch over solid punch.
21.
FITTING SECTION
1. What is meant by fitting - fitting is the process of assembling the item after bringing the components to the exact size and geometrical shape and tolerance
2. What is the No. of teeth in a ' BASTARD FILE' per Cm? - 12 teeth per cm.
3. Which material is used to make the file? - High carbon steel
4. What is the carbon content of work piece used in fitting? - 0.15 to 0.3
5. What is the name of material used in fitting shop? - M S Flat of size 50x10 mm
6. What is the least count of the vernier caliper used in fitting shop? - 0.02 mm - Least count = one main scale division - one Vernier scale division in Vernier caliper
8. How to calculate the least count of a vernier? Least count is the difference between one main scale division and one vernier scale division
9. What is the least count of the micrometer? 0.01 mm - distance moved by the spindle per revolution of thimble divided by number of divisions in the thimble
10. Can you tell the name of hammers used in the fitting shop? - ball peen hammer straight peen hammer and cross peen hammer
11. What is the purpose of soft hammer in fitting shop? - To tap the sophisticated items without damaging it - example bearing
12. Can you tell the approx size of work table used in the fitting shop? 1.75m x 0.8mx0.75m
13. How to specify a file? By the shape (cross section) and type like rough smooth dead smooth etc
14. What is meant by drilling? - making hole in the any item using the tool drill bit
15. What is the name of tool used to make holes in thick materials? - drill bit
16. Identify the Nut and Bolt from the given items. - The item with thread on the periphery is the bolt and the thread provided inside the hole is the nut
17. What is the name of tool used to cut thread inside a hole - Threading tap
18. What is the name of tool used to cut thread on the periphery of a cylindrical item? - Die
19. What is meant by a combination set? What are the uses of it? - It consists of a try square, a MITRE square and a provision to find out the centre of a cylindrical item
20. How to specify a hack saw blade? By the Number of teeth per 2.5 cm and the width and length of the blade. 18 and 24 are the standard No of teeth per inch (25.4)
21. What are the methods of filing and where it is used. Straight filing, cross filing and draw filing. straight filing is used to file thick materials and cross filing is used for filing thin material and also to reduce the formation of convexity in the middle of the materials. Draw filing is used to correct the convexity in the sides.
Safety and General Study of Tools (The Answers will be hidden by today 10 PM 15/09/2021)
1. Name three important safety point followed in a work shop?
2. What is the advantage of roller bearing over ball bearing?
3. what is the purpose of 'O' ring?
4. what material is used for making 'O' rings and Seals?
5. what is the name of tool temporary holding an item?
6. Name two types of screw drivers?
7. What item is used for preventing lateral movement of component inside a hole?
8. Name two types of circlips?
9. What is the name of component to transmit the power from a electric motor shaft to pulley?
10. Name the item to transmit large power from one pulley to other without much slip?
1. What is meant by sheet metal? How a sheet is distinguished from plate?
4. What is meant by GI sheet? - Galvanized iron sheet
5. How G I sheet is manufactured - By passing the sheet through molten zinc
6. Why G I sheet metal should not be welded? - Poisonous gas will be produced at elevated temperature
7. What is the included angle of prick punch? - 30 to 60 degree
8. Name the tools used to cut sheet metal - snips, shear, nippers
9. What is the purpose of Scribers? - For drawing lines over metallic objects.
10. Can you tell the name of material used for making the surface plate? And tell why steel can’t be used for making surface plate. - Cast iron or granite - The friction should be minimum and should be durable.
11. What is meant by soldering? Where it is used in sheet metal? - soldering is the process of joining the metal with solder to make the item leak proof
12. What is the least count of a steel rule? - Usually 1 mm, in certain steel rules it will be 1/2 mm
13. How many mm is one inch? 25.4 mm
14. What is the name of supporting tool used in sheet metal shop? - Stakes
15. What is the name of tool used to press the locked up seam? - Groover
16. What is meant by solid punch? What is the purpose of solid punch - solid punch is used to make hole in thin sheets
17. How a sheet metal is specified? - The material by which it is made, the thickness and the size of the sheet
18. What is meant by SWG? - Standard wire Gauge. It is used to measure the diameter of wire and the thickness of the sheets
19. Tell the various methods of jointing the sheet metal
20. What is the advantage of hollow punch over solid punch.
21.
FITTING SECTION
1. What is meant by fitting - fitting is the process of assembling the item after bringing the components to the exact size and geometrical shape and tolerance
2. What is the No. of teeth in a ' BASTARD FILE' per Cm? - 12 teeth per cm.
3. Which material is used to make the file? - High carbon steel
4. What is the carbon content of work piece used in fitting? - 0.15 to 0.3
5. What is the name of material used in fitting shop? - M S Flat of size 50x10 mm
6. What is the least count of the vernier caliper used in fitting shop? - 0.02 mm - Least count = one main scale division - one Vernier scale division in Vernier caliper
8. How to calculate the least count of a vernier? Least count is the difference between one main scale division and one vernier scale division
9. What is the least count of the micrometer? 0.01 mm - distance moved by the spindle per revolution of thimble divided by number of divisions in the thimble
10. Can you tell the name of hammers used in the fitting shop? - ball peen hammer straight peen hammer and cross peen hammer
11. What is the purpose of soft hammer in fitting shop? - To tap the sophisticated items without damaging it - example bearing
12. Can you tell the approx size of work table used in the fitting shop? 1.75m x 0.8mx0.75m
13. How to specify a file? By the shape (cross section) and type like rough smooth dead smooth etc
14. What is meant by drilling? - making hole in the any item using the tool drill bit
15. What is the name of tool used to make holes in thick materials? - drill bit
16. Identify the Nut and Bolt from the given items. - The item with thread on the periphery is the bolt and the thread provided inside the hole is the nut
17. What is the name of tool used to cut thread inside a hole - Threading tap
18. What is the name of tool used to cut thread on the periphery of a cylindrical item? - Die
19. What is meant by a combination set? What are the uses of it? - It consists of a try square, a MITRE square and a provision to find out the centre of a cylindrical item
20. How to specify a hack saw blade? By the Number of teeth per 2.5 cm and the width and length of the blade. 18 and 24 are the standard No of teeth per inch (25.4)
21. What are the methods of filing and where it is used. Straight filing, cross filing and draw filing. straight filing is used to file thick materials and cross filing is used for filing thin material and also to reduce the formation of convexity in the middle of the materials. Draw filing is used to correct the convexity in the sides.
Safety and General Study of Tools (The Answers will be hidden by today 10 PM 15/09/2021)
1. Name three important safety point followed in a work shop?
2. What is the advantage of roller bearing over ball bearing?
3. what is the purpose of 'O' ring?
4. what material is used for making 'O' rings and Seals?
5. what is the name of tool temporary holding an item?
6. Name two types of screw drivers?
7. What item is used for preventing lateral movement of component inside a hole?
8. Name two types of circlips?
9. What is the name of component to transmit the power from a electric motor shaft to pulley?
10. Name the item to transmit large power from one pulley to other without much slip?