Preview Questions HVAC Technician | Role Specific Skill

Question 1: When operating an HVAC system, how does the evaporator coil contribute to the cooling process?

Which action should you take?

Choose only one option

It absorbs heat from the air and cools it before circulating throughout the space

It moves the air through the condenser coils

It compresses refrigerant to raise its temperature

It filters the air as it circulates

Question 2: What is the effect of neglecting to check refrigerant levels during preventative maintenance?

Which action should you take?

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Reduced indoor air quality

Increased cooling efficiency

Reduced compressor lifespan

Increased energy consumption

Question 3: If an HVAC unit is operating inefficiently, what could be the cause?

Which action should you take?

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Faulty thermostat settings or electrical connections

Only a clogged air filter without any other system checks

Dirty coils, improperly sized ductwork, or incorrect refrigerant charge

Increased power consumption due to excessive airflow

Question 4: When operating an HVAC unit, how should the refrigerant charge be monitored for optimal performance?

Which action should you take?

Choose only one option

By checking the outdoor unit temperature and assuming correct refrigerant charge

Using a manifold gauge set to measure the suction and discharge pressure levels, ensuring they meet manufacturer specifications

By visually inspecting the system's refrigerant lines for leaks

By simply monitoring the compressor sound and adjusting the system

Question 5: How can you diagnose an HVAC system that is short-cycling?

Which action should you take?

Choose only one option

Check the thermostat settings, refrigerant levels, and airflow

Replace the compressor

Decrease the system's power supply

Clean the condenser coils

Question 6: How is a Variable Refrigerant Flow (VRF) system designed to enhance efficiency?

Which action should you take?

Choose only one option

By adjusting refrigerant flow based on cooling needs

By adjusting airflow rates according to demand

By controlling air conditioning cycles more accurately

By using multiple compressors for efficiency