Ohio HVAC Practice Test (Free)

Question 1

What two exams does PSI administer for an Ohio HVAC contractor license applicant?

Accepted Answer

A Trade exam and a Business and Law exam

Answer

An EPA Section 608 exam and a safety exam

Answer

A written exam and a hands-on field demonstration

Answer

Only a single combined exam covering all topics

Question 2

Why is a filter-drier installed in the liquid line of a refrigeration system?

Accepted Answer

To remove moisture and particulate contaminants that could damage the metering device or compressor

Answer

To measure the system's operating superheat

Answer

To increase refrigerant pressure before the condenser

Answer

To convert refrigerant vapor to a liquid state

Question 3

Which EPA Section 608 certification type covers high-pressure appliances such as residential split-system air conditioners and heat pumps?

Accepted Answer

Type II certification

Answer

Type I certification

Answer

Type III certification

Answer

No certification is required for these appliances

Question 4

What is the purpose of a defrost cycle on an outdoor heat pump unit during cold weather heating operation?

Accepted Answer

To periodically melt frost buildup on the outdoor coil so it can continue absorbing heat efficiently

Answer

To permanently switch the system from heating to cooling mode

Answer

To recharge the system with additional refrigerant

Answer

To clean the indoor evaporator coil of dust

Question 5

In a hydronic boiler system, what would a technician suspect if radiators throughout the home are cooler than expected despite the boiler firing and reaching setpoint temperature?

Accepted Answer

Trapped air in the system or a failed circulator pump limiting hot water flow to the radiators

Answer

The furnace filter is clogged and restricting airflow

Answer

The refrigerant charge in the boiler is low

Answer

The reversing valve is stuck in cooling mode

Question 6

In the basic refrigeration cycle, what is the primary function of the compressor?

Accepted Answer

To raise the pressure and temperature of refrigerant vapor so it can reject heat at the condenser

Answer

To lower refrigerant pressure before it enters the evaporator

Answer

To filter moisture and debris from the refrigerant

Answer

To meter the exact amount of refrigerant entering the evaporator

Question 7

A technician holds Type I and Type II EPA Section 608 certification but not Type III. Which task would exceed the scope of their certification?

Accepted Answer

Servicing a low-pressure chiller in a commercial building

Answer

Recovering refrigerant from a residential split-system heat pump

Answer

Servicing a small factory-sealed household refrigerator

Answer

Recovering refrigerant from a window air conditioning unit

Question 8

A technician measures low superheat and low subcooling on a fixed-orifice metering device system. What does this combination most likely indicate?

Accepted Answer

An overcharged refrigerant system

Answer

A significant refrigerant undercharge

Answer

A dirty outdoor condenser coil restricting airflow

Answer

A failed compressor with no refrigerant flow at all

Question 9

A homeowner's forced-air furnace short cycles on the limit switch only when the whole-house air filter is due for replacement. What underlying relationship explains this pattern?

Accepted Answer

A clogged filter restricts return airflow, raising plenum temperature until the limit switch trips

Answer

A clogged filter increases refrigerant charge in the heat exchanger

Answer

A clogged filter lowers the gas valve pressure, causing incomplete combustion

Answer

A clogged filter has no effect on furnace airflow or temperature

Question 10

For continuing education purposes, does completing EPA Section 608 recertification satisfy Ohio's OCILB continuing education hour requirement for HVAC contractor license renewal?

Accepted Answer

EPA 608 certification and OCILB continuing education are governed separately, so a contractor should confirm which OCILB-approved courses count toward the state hour requirement

Answer

Yes, EPA 608 recertification automatically fulfills all OCILB continuing education hours

Answer

No continuing education is required for HVAC contractors in Ohio

Answer

OCILB continuing education replaces the need for EPA 608 certification entirely