The solder should be melted by:
A) After wrapping it around the pipe. B) By touching it to the pipe.
C) By the torch flame. D) Before applying the flame to the pipe.
B
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?The process of film casting combines plastics granules, plasticizers, solvents and other additives and pours them onto a belt. The film is produced by the evaporation of ____.
A. ?granules B. ?water C. ?solvent D. ?plasticizers
After drying to eliminate the water in plant litter, which two elements account for about 80% of the dry weight?
A) Ca and C B) N and S C) C and H D) N and C E) C and O
One of the primary features of the smart grid concept is _____
a. the elimination of fossil fuel-based power b. the guarantee that power will never be interrupted c. two-way communication between loads and power sources d. power that costs the same for all customers, at all times of the day
A scale that reads 1:2 is a(n):
A. architect's scale B. metric scale C. civil engineer's scale D. full scale E. half scale