IICRC RCT Practice Questions - IICRC Rug Cleaning Technician Exam

Knot density in hand-knotted rugs is most commonly expressed in:

Stitches per inch (SPI) Knots per square inch (KPSI) or knots per square decimeter Picks per centimeter (PPC) Threads per square millimeter (TPSM)

Knots per square inch (KPSI) or knots per square decimeter

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