Question

all of the following can cause mortar problems in a masonry wall except
improper mortar mix
temperatures too cold during application
applying the mortar to damp bricks
mortar joints too thin
antifreeze in the mortar
question 49
weep holes in masonry walls
are only provided in solid masonry walls
drain to the building interior
are found at both the top and bottom of the wall
require a flashing at the bottom of the wall
are used instead of a vented rain screen

Explanation:

1. For the first question: An improper mortar mix can lead to strength and adhesion issues. Cold temperatures can affect setting. Applying to damp bricks can cause bonding problems. Thin mortar joints can be weak. Antifreeze in mortar is often used to prevent freezing - related issues and is not a cause of mortar problems.
2. For the second question: Weep holes are not only in solid masonry walls. They drain to the exterior to prevent water accumulation inside the wall. They are typically at the bottom of the wall. They often require flashing at the bottom to direct water out properly and are not a replacement for a vented rain - screen.

Answer:

1. E. antifreeze in the mortar
2. D. require a flashing at the bottom of the wall