HVAC Air Distribution System Exam | 2025/2026 | 40+ Q&A | Static Pressure, Fan Laws, Duct Design, Dampers | HVAC Tech & Engineering

This document includes 40+ high-accuracy exam questions and verified answers focused on air distribution systems in HVAC, specifically for the 2025/2026 academic year. Designed to support students, apprentices, and technicians, the material aligns with standard HVAC training objectives and testing guidelines. Topics thoroughly covered include: Airflow mechanics and pressure concepts, such as total, static, and velocity pressure Fan laws and calculations (e.g., using Fan Law 1 to adjust RPM or static pressure based on CFM changes) Ductwork systems, including metal and fiberglass ducts, external static pressure loss, and transition fittings System types and configurations, like trunk and radial systems for slab-built homes and high-sidewall outlet designs Smoke and air control components, such as Class 1 smoke dampers and balancing dampers Airflow requirements for heating and cooling, including standard 400 CFM per ton airflow benchmarks Instrumentation, like hygrometers for measuring relative humidity This resource is ideal for: HVAC technician students enrolled in residential or light commercial air distribution courses Trade school apprentices preparing for module exams or certification assessments Engineering technology students studying fluid dynamics in mechanical systems HVAC installers and service professionals seeking review material for airflow balancing and duct design concepts All questions are structured to reinforce real-world understanding of airflow principles and air handling system performance in both heating and cooling applications. Keywords: air distribution, HVAC exam, static pressure, velocity pressure, fan law, external static loss, ductwork systems, airflow balancing, smoke dampers, trunk and radial systems, fiberglass ducts, metal ducts, cfm calculation, HVAC airflow, hygrometer, blower inlet pressure, pressure loss, ceiling air outlets, airflow per ton