Which type of finish is inappropriate for standard high-temperature calcium silicate or perlite insulation?
a. Aluminum jacket
b. Stainless steel jacket
c. PVC jacket
d. Glass fabric and mastic finish
c. PVC jacket
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Las luces que conforman la iluminación portátil dentro de tiendas y puestos deben:
a. protegerse. b. ser incandescentes. c. tener protección mediante interruptor de circuito de pérdida a tierra (GFCI). d. ser de menos de 15 V.
Si un conductor a tierra entra a una caja, la cantidad de conductores permitida en la caja se reduce a:
a. 1 b. 2 c. 3 d. 4
_____________ promote combustion in other materials and can cause a fire.
Fill in the blank(s) with the appropriate word(s).
A reciprocating compressor with six cylinders, three banks of two cylinders each, can have its capacity reduced by unloading to ____% of full capacity.
A. 12.5 B. 25 C. 33-1/3 D. 50