____ result(s) from excessive heat, temperature, and filler metal during welding.
A. Porosity
B. Grapes
C. Suck back
D. Incomplete penetration
Answer: B
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One amp is equal to _______________ electrons flowing past a measured point in one second.
Fill in the blank(s) with the appropriate word(s).
?During ____, a plastics film is placed over the layup and a vacuum is drawn between the film and the mold.
A. ?cold-mold thermoforming B. ?vacuum-bag processing C. ?sheet molding D. ?rigidized shell spray-up
This type of casting refers to a process in which a steel or iron mold can be used many times and produces a better finished quality than with sand casting.
a. centrifugal casting b. die casting c. permanent casting d. sand casting
The final choice of piping material for many applications, including fuel gases, is often controlled by _____
a. building codes b. the material cost c. personal preference d. the installing contractor