c-54-tile-ceramic-mosaic Practice Test

1Single Choice

Before setting the first tile in a room, what is the primary purpose of laying out reference chalk lines that intersect at right angles at the room's center?

A.To identify the locations for floor drains and plumbing penetrations before installation begins.
B.To establish a working grid that keeps tile joints straight, square, and balanced at the perimeter.
C.To mark the locations where thin-set mortar must be applied more thickly to level low spots.
D.To determine the exact number of full tiles and cut tiles required for material ordering.

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