Los materiales refractarios son ____.
a. cortafuegos
b. materiales de alta presión
c. materiales resistentes a llamas y calor
d. topes de fugas
c. materiales resistentes a llamas y calor
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Green-stained brick often show no sign of a stain until they are _____ .
A. scrubbed with soap and water B. soaked in rain water C. washed in an acid solution D. exposed to salts in proprietary cleaners
Why do supermarkets use split condensers on their parallel rack systems?
a. To make sure there is plenty of condenser available for hot weather. b. To keep the head pressure up in cold ambients. c. Because two small coils are cheaper than one large condenser coil.
Why are perennial weeds more difficult to control in a lawn than annual weeds?
What will be an ideal response?
The airflow on a single-deck coffin-style open display case:
A) Is across the top of the case. B) Travels lengthwise from one end to the other. C) Is all around the product. D) Is only on the bottom of the case.