What is the difference between primary roof drains and secondary roof drains?
What will be an ideal response?
The secondary roof drains function as over-flow drains and come into action when the primary roof drains are blocked. Both drainage systems must be independent and separated from each other.
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Un lugar adecuado para obtener información sobre el halado de determinadas marcas de cables es:
a. el manual del sistema tiracables. b. el NEC®. c. los catálogos del fabricante. d. revistas del sector.
_____ inhabit the arctic tundra of far northern Canada, Alaska, Greenland, and a few Arctic islands
a. Mountain lion b. Musk oxen c. Grizzly bear d. Polar bear
Elevations that are specified on the floor plan and elevation drawings should be referenced on a section by use of a ____ or an elevation placed over a leader line.
A. detail line B. leader line C. section line D. datum line
If the meter is set on the 15-volt range, it will require a current of ____ microamperes to operate the meter movement.
a. 25 b. 50 c. 75 d. 100