____ 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).

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?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

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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

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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

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