Preview Questions HVAC Technician | Role Specific Skill

Question 1: What is the purpose of the high-pressure switch in an HVAC refrigeration system?

Which action should you take?

Choose only one option

To monitor refrigerant flow between the condenser and evaporator

To protect the compressor from excessive pressure by shutting down the system if pressure is too high

To control the airflow rate through the condenser

To regulate refrigerant temperature entering the evaporator coil

Question 2: What is the purpose of the blower motor in an HVAC system during operation?

Which action should you take?

Choose only one option

To control the system's temperature setting

To filter dust and allergens from the air

To circulate air through the ducts and system, ensuring consistent airflow

To compress refrigerant in the system

Question 3: How does an HVAC system regulate indoor humidity levels?

Which action should you take?

Choose only one option

By increasing the air pressure to expel moisture

By using a built-in dehumidifier or through condensation on the evaporator coil

By cooling the air without considering moisture content

By increasing the air temperature to absorb moisture

Question 4: What is the effect of neglecting to check refrigerant levels during preventative maintenance?

Which action should you take?

Choose only one option

Reduced indoor air quality

Increased cooling efficiency

Reduced compressor lifespan

Increased energy consumption

Question 5: In an HVAC system design, what is the effect of over-sizing the air handler or furnace?

Which action should you take?

Choose only one option

It has no significant effect on energy use

It improves system reliability and reduces maintenance needs

It reduces the overall cost of installation

It can result in energy inefficiency and short cycling, causing higher energy consumption

Question 6: How does an HVAC technician ensure the correct airflow in a new duct system installation?

Which action should you take?

Choose only one option

By estimating the airflow based on the number of vents

By reducing the number of ducts to minimize airflow

By measuring static pressure and adjusting duct sizes to ensure balance and efficiency

By increasing the fan speed to overcome resistance