Question

appropriate back - up materials for a ceramic tile shower stall include all of the following except
mortar and lath
drywall
moisture resistant drywall
lightweight concrete panels
plywood
question 19
the fixture in the house that is going to have the weakest flow and drainage is
the lowest fixture in the house
the smallest fixture in the house
toilets because they have only cold water supply
the highest fixture in the house
the fixture closest to the dishwasher (usually the kitchen sink) because the dishwasher uses so much water

Explanation:

For the first question, drywall is not suitable as a backup material for a ceramic - tile shower stall as it is not moisture - resistant enough. For the second question, the highest fixture in the house will have the weakest flow and drainage due to the effects of gravity on water pressure.

Answer:

1. B. drywall
2. D. the highest fixture in the house