Project: Demonstrate your ability to use the oxy-acetylene welder and the proper tools.
 

SKILL: To join two dissimilar metals.

Position: Horizontal

Material: One piece of 1/16" * 2" * 3" mild steel
One piece of 1/16" * 2" * 3" stainless steel
1/8" flux coated brazing rod

Procedures:

1. Secure metal plates.
2. Adjust the torch flame properly.
3. Position metal for a horizontal butt weld.
4. Prepare metal for welding, then tack weld at each end.
5. Braze weld the stainless and mild steel plates together.
6. Put oxy-acetylene equipment away properly.
7. Cool metal thoroughly.
8. Put contestant number on the back sides of both metal plates.
9. Submit your work and this sheet with the completed parts identification section on back.
 
 

Note the Scoresheet and diagram on the next page!
 
 

                                                                                                                           Points

Criteria                                                                                     Possible     Earned
 

1. Appearance                                                                               5         _____

2. Uniform width of bead                                                               5         _____

3. Welding done at correct temperature                                          5         _____

4. Free of distortion                                                                        4         _____

5. Uniform Face of weld                                                                 5         _____

6. Welded in the proper position                                                     2         _____

7. Proper selection of filler rod                                                        4         _____

8. Stress test                                                                                  5         _____

9. Safety habits and attitude                                                            5          _____

Total points Problem solving                                                     10         _____

Total Points                                                                                 50         _____

Oxyacetylene Problem Solving:
 

1. Will the part labeled #1 work properly?

YES     NO

Explain why or why not: ___________________________________________________
 

2. The part labeled #2 is made of what material?

a. Copper
b. Stainless Steel
c. Aluminum
d. Tin

3. The tank labeled #3 has what type of substance in it?

a. Acrylic
b. Asbestos
c. Bulsa wood
d. Charcoal

4. On part #4 what gas comes out the hole labeled 4A?

a. Oxygen
b. Propane
c. Acetylene
d. Hydrogen

5. The valve on the tank labeled #5 is made of what material?

a. Brass
b. Stainless Steel
c. Copper
d. Mild Steel

6. What safety device is found on tank labeled #6 is known as what?

a. Bursting disk
b. Safety plug
c. Slip disk
d. fusible plug

7. Examine the item tagged #7. The type of flame that you should use when welding this type of metal is:

a. Slightly carbonizing
b. Slightly oxidizing
c. Neutral

8. Which shade lens is recommended for use when brazing?

a. 8A
b. 8B
c. 8C
d. 8D

9. The oxy-acetylene filler rod that is tagged #9 should be used to weld?

a. Cast iron
b. Mild Steel
c. Aluminum
d. High Carbon Steel

10. The item tagged #10 is used to:

a. Test the system for leaks
b. Remove/tighten fittings
c. Clean plugged tips
d. Cool the tip when it is hot