Spreading should include
IRC: Chapter 4, sections R401 thru R408 (https://codes.iccsafe.org/content/IRC2018/chapter-4-foundations); Chapter 6, sections R606–R608 (https://codes.iccsafe.org/content/IRC2018/chapter-6-wall-construction); and Chapter 7, section R703 (https://codes.iccsafe.org/content/IRC2018/chapter-7-wall-covering), identify types and strength of various mortar required by code.
Process/Skill Questions:
NCCER Standards:
Core Curriculum: Introductory Craft Skills
Masonry: Level One (L1NCCT28)