?Chemical resistance tests of selected plastics shows that ____ is only slightly affected by strong acids.
A. ?polyamide
B. ?acetal
C. ?melamine
D. ?acrylic
Ans: C. ?melamine
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All of the power used in motion comes from the ____.
A. forequarters B. gaskin C. forearms D. hindquarters
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Una dobladora conformadora se utiliza comúnmente para evitar la/el _____ del PVC al doblarlo.
a. corrosión b. aplanado c. corte d. presión excesiva
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Each panelboard must be protected on the __________ side with an overcurrent protective device having a rating equal to or less than the panelboard’s ampacity rating.
Fill in the blank(s) with the appropriate word(s).
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Which engineering controls might be used to reduce the risk of hearing loss on a job site?
A. Reducing noise at the source. B. Reducing reverberation. C. Reducing structure-borne vibration. D. All of the above
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