A spot weld symbol is similar to the weld-all-around symbol except that it is not centered on the reference line.
Answer the following statement true (T) or false (F)
False
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Welding heat distortion and weld metal shrinkage are common problems caused by using an oxyacetylene torch to make large flat weldments.
Answer the following statement true (T) or false (F)
A phototransistor is a light-detecting transistor that uses __________ to generate carriers to supply the base leg current.
A. heat B. voltage C. light D. pressure
Center lines are displayed on a print using a series on long and alternating double short dashes to shows or locate the centers of symmetrical objects.
Answer the following statement true (T) or false (F)
Which acts like a safety valve that will release any excess pressure caused by too much heat or too much pressure within the cylinder?
A. pressure relief valve B. check valve C. fusible plug D. pop-off valve