4B Mechanical General 4C Mechanical Plan Review (Mechanical Plansiner) The 4B and 4C split tests both rely heavily on code-based calculations and plan-reading scenarios, yet differ sharply 4B emphasizes broad mechanical systems knowledge through multiple-choice, while 4C drills deep into construction documents with detailed plan review questions. Mastering both requires understanding how code tables translate into real ductwork, piping, and equipment specifications on actual blueprints.
| Exam Name | 4B Mechanical General 4C Mechanical Plan Review (Mechanical Plansiner) |
| Format | PDF & Practice Test Engine |
| Target Year | 2026 Updated |
| Features | 100% Verified Q&As |
