The respirator that would be used where dust or solid particles might be inhaled is a _____
A) supplied air mask
B) full facepiece mask with chemical canisters
C) half mask or mouthpiece with a mechanical filter
D) self-contained breathing apparatus
Answer: C
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While concrete is being placed, the forms must be checked to be sure they are _____.
a. not leaking b. completely filled c. properly braced d. plumb and level
La caída de voltaje máxima recomendada para cargas de potencia, calefacción e iluminación es:
a. 0.01 b. 0.02 c. 0.03 d. 0.04
¿Cuál es la distancia entre los dobleces al crear una compensación utilizando dobleces de 30° para atravesar un obstáculo de 6 pulgadas (15,24 cm)?
a. 1,5 pulgadas (3,81 cm) b. 6 pulgadas (15,24 cm) c. 9 pulgadas (22,86 cm) d. 12 pulgadas (30,48 cm)
Congress charged the Environmental Protection Agency (EPA) to protect which of the following parts of the environment?
a. land c. water systems b. air d. all of the above