Explain why the stiffness of the subfloor is more important for ceramic tile or natural stone floor covering than for vinyl tile or carpet floor covering.
What will be an ideal response?
Natural stone or ceramic tiles are both brittle materials. As such, they cannot withstand much bending. If the subfloor is not sufficiently stiff, i.e., it bends (or yields) under foot traffic, brittle floor coverings will crack and break. Although a stiff subfloor is desirable for all floor coverings, flexible floor coverings, such as vinyl tile or
carpet, are better able to withstand the bending of the subfloor.
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Answer the following statement(s) true (T) or false (F)
If installed underground, steel pipe does not need to be coated.
UNDERSTANDING PROCESS EQUIPMENT
Each occupant must have ready access to ____ protecting the conductors supplying that occupancy.
A. primary feeders B. all overcurrent devices C. panel boxes D. service laterals
The coil of a current magnetic relay is wired:
A. in series with the start winding. B. in series with the run winding. C. in parallel with the common winding. D. in parallel with the run winding.