?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
Una dobladora conformadora se utiliza comúnmente para evitar la/el _____ del PVC al doblarlo.
a. corrosión b. aplanado c. corte d. presión excesiva
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).
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