In brick jack arch flooring, joists are encased in ___________ mortar, for preventing their rusting from _________ mortar.
A. Lime, cement
B. Cement, lime
C. Mud, cement
D. Mud, lime
Answer:B
In brick jack arch flooring, joists are encased in ___________ mortar, for preventing their rusting from _________ mortar.
A. Lime, cement B. Cement, lime C. Mud, cement D. Mud, lime