?Large slabs or blocks of flexible polyurethanes are cast in open and closed molds and cut into slabs for _____.
A. ?flotation material in boats
B. ?coatings on fabrics
C. ?mattress stock
D. ?insulation in rail cars
Answer: C
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Which is NOT a criteria that the EPA uses to define used oil?
A) Color B) Origin C) Use D) Contaminants
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