Preview Questions HVAC Technician | Role Specific Skill

Question 1: In HVAC system design, how does a manual J calculation differ from a manual D calculation?

Which action should you take?

Choose only one option

Manual J calculates heating and cooling loads, while Manual D designs the ductwork

Manual J focuses on equipment sizing, while Manual D is for temperature control

Manual J is used for duct size optimization, while Manual D handles load calculations

Manual D is focused on refrigerant system design, while Manual J focuses on energy efficiency

Question 2: What should an HVAC technician check first when an air handling unit (AHU) is not blowing air as expected?

Which action should you take?

Choose only one option

Test the compressor and condenser unit

Inspect the thermostat settings and calibration

Verify the refrigerant pressure and levels

Check the blower motor, belts, and air filter for obstructions

Question 3: What is the likely issue when the HVAC system's evaporator coil is not freezing?

Which action should you take?

Choose only one option

Low refrigerant charge or insufficient airflow

Dirty air filters

Blower motor malfunction

Thermostat failure

Question 4: What is the primary cause of a humming sound but no cooling or heating from the HVAC system?

Which action should you take?

Choose only one option

Low refrigerant levels or a refrigerant leak

A malfunctioning thermostat

A faulty capacitor or electrical issue with the compressor

A clogged air filter or blocked ducts

Question 5: How do high-efficiency filters contribute to energy efficiency in HVAC systems?

Which action should you take?

Choose only one option

They increase energy consumption by requiring more airflow

They reduce airflow resistance, allowing the system to run more efficiently

They only affect the indoor air quality and have no impact on energy efficiency

They reduce system capacity but improve air quality

Question 6: What is the role of variable refrigerant flow (VRF) systems in energy-efficient HVAC design?

Which action should you take?

Choose only one option

They allow for individual temperature control in different areas, optimizing energy usage

They reduce refrigerant charge, making the system less effective

They focus only on cooling, not heating efficiency

They decrease system capacity by limiting airflow