Radio frequency noise is created by ____.
A. natural factors such as solar flares
B. man-made waves caused by electrical motors
C. Both A and B
Answer: C
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A back or backing weld is easily distinguished when a multiple ____ line is used.
A. dimension B. join C. reference D. extension
A material whose core is noncombustible but is covered with a combustible lamination or paint is considered a noncombustible material, provided that the thickness of the paint or lamination does not exceed
A) 1/16 in. B) 1/8 in. C) 1/4 in. D) 1/2 in. E) 1 in.
Coarser-ground limes have better lime efficiency
Indicate whether the statement is true or false.
A fracture in the weld metal running across the weld is known as a _____
A) transverse crack B) longitudinal root crack C) wagon track D) longitudinal crack