This text comprises a question-and-answer format document, seemingly a study guide or reference material for fire sprinkler system installers. It covers various aspects of fire sprinkler system installation, inspection, and maintenance, referencing specific sections of multiple NFPA standards and the Minnesota State Fire Code. The questions and answers detail requirements for pipe sizing, sprinkler head spacing and types, system testing, and other critical elements of fire protection systems. Several questions address inspection frequencies and maintenance procedures for different components. Finally, the document includes information on licensing requirements and penalties for violations in Minnesota.