Application of mortar should include
IRC: Chapters 4 (https://codes.iccsafe.org/content/IRC2018/chapter-4-foundations) and 6 (https://codes.iccsafe.org/content/IRC2018/chapter-6-wall-construction) explain how to ensure mortar strength and joint applications comply with building codes, as related to various masonry products.
Process/Skill Questions:
NCCER Standards:
Core Curriculum: Introductory Craft Skills
Masonry: Level One (L1NCCT28)