WELDING THEORY - OD1650 - LESSON 1/PE1
PRACTICAL EXERCISE 1
On a plain sheet of paper, write down the answers to the following questions. When you have
answered them, turn the page and check your answers.
1.
Define the term weldability.
2.
Why are metals with high thermal conductivity difficult to weld?
3.
What is the function of a welding symbol?
4.
The reference line of a welding symbol is used to --------------------------------------------------------------------------------
---------------------------------------------------------------------------------------- .
5.
What are the eight elements of a welding symbol?
6.
Draw and name the four basic resistance weld symbols.
7.
What is the letter designation for flow welding?
8.
Name the four methods of applying welding processes.
9.
What type of symbol is used for welds that extend completely around a joint?
10.
Where is the size of a fillet weld placed in respect to the weld symbol?
11.
How is the strength of arc spot welds designated?
12.
What is the purpose of the back or backing weld symbol?
13.
What type of weld is intended to be used for light gage metal joints involving the flaring
of the edges to be joined?
14.
When a definite number of resistance spot welds is desired in a certain joint, the number
shall be shown in --------------------------------------------------------------------------------------------------------------------------------------------- .
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