Decomposing wastes produce methane and a compound called hydrogen ____
A) peroxide
B) sulfide
C) monoxide
D) none of these
B
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Una caja se incluye en el NEC® como caja que contiene una cantidad máxima de ocho cables número 12. Si la caja tiene una abrazadera para cable y un receptáculo doble, _____ cable(s) se tendrá(n) que deducir del total permitido.
a. 1 b. 2 c. 3 d. 4
Trees or shrubs that are planted together so they can point out a special feature, provide privacy, or
create a small garden area are known as a:
a. cluster planting c. group planting b. border planting d. landscape planting
When using a recovery machine manufactured after November 15, 1993, the recovery level for Type II systems containing over 200 lb of R-22 refrigerant is:
A) 0 psig. B) 4 in Hg vacuum. C) 10 in Hg vacuum. D) 15 in Hg vacuum.
A vital part of the full-body harness is the fixed back _____
a. T-clamp b. A-frame c. K-connector d. D-ring