Ohio HVAC Practice Test (Free)

Question 1

A technician plans to work only on low-pressure chillers used in a large commercial building. Which EPA Section 608 certification type specifically covers this equipment?

Accepted Answer

Type III certification

Answer

Type I certification

Answer

Type II certification

Answer

No certification exists for chillers

Question 2

In Ohio, how does OCILB treat hydronics contracting relative to general HVAC contracting?

Accepted Answer

Hydronics is a separate OCILB license with the same general licensing structure as HVAC

Answer

Hydronics work is automatically covered under any HVAC contractor license

Answer

Hydronics contracting is unregulated in Ohio

Answer

Hydronics is regulated only by the EPA, not OCILB

Question 3

During a compressor changeout following a burnout, why is it critical to install a suction line filter-drier in addition to the standard liquid line drier?

Accepted Answer

To capture acid and contaminant residue from the failed compressor before it reaches the replacement compressor

Answer

To increase the system's total refrigerant charge capacity

Answer

To replace the need for evacuating the system before recharging

Answer

To reduce the superheat setting permanently

Question 4

Which federal law establishes the refrigerant handling certification requirements enforced through EPA Section 608?

Accepted Answer

The Clean Air Act

Answer

The Clean Water Act

Answer

The Occupational Safety and Health Act

Answer

The National Fire Protection Act

Question 5

In a gas furnace, what is the primary function of the heat exchanger?

Accepted Answer

To transfer heat from combustion gases to the circulating air without mixing the two airstreams

Answer

To mix outdoor air with return air before combustion

Answer

To ignite the burners using an electric spark

Answer

To filter dust and debris from the return air

Question 6

An Ohio HVAC contractor holds an OCILB HVAC contractor license but has never taken an EPA Section 608 exam. Can this contractor legally recover refrigerant from a customer's air conditioner?

Accepted Answer

No, EPA Section 608 certification is required for anyone who handles refrigerant, regardless of state contractor licensing status

Answer

Yes, because the OCILB contractor license already satisfies federal refrigerant handling requirements

Answer

Yes, as long as the contractor has 5 years of trade experience documented with OCILB

Answer

No, but only because Ohio requires a separate state refrigerant handling exam instead of the federal one

Question 7

In a forced-air heating system, what problem is most commonly caused by a severely undersized return air duct?

Accepted Answer

Reduced airflow across the heat exchanger, which can trip the limit switch and cause short cycling

Answer

Excess refrigerant charge in the condenser

Answer

Increased gas valve pressure at the burner orifice

Answer

A drop in the thermostat's calibration accuracy

Question 8

A split-system air conditioner shows high head pressure, high suction pressure, and reduced airflow across the indoor coil, with high amp draw on the compressor. What is the most likely root cause?

Accepted Answer

A severely restricted or dirty air filter reducing airflow across the evaporator

Answer

A refrigerant undercharge

Answer

A leaking Schrader valve slowly losing charge

Answer

An open low-pressure switch shutting off the compressor

Question 9

What is the purpose of a flame sensor in a modern gas furnace's ignition system?

Accepted Answer

To confirm the burner flame is actually present and shut off gas flow if it is not

Answer

To ignite the burners directly using a spark

Answer

To measure the temperature of the return air

Answer

To control the speed of the indoor blower motor

Question 10

What continuing education is required for an Ohio HVAC contractor to renew a license on a one-year cycle?

Accepted Answer

8 hours of continuing education

Answer

40 hours of continuing education

Answer

No continuing education is required for annual renewal

Answer

2 hours of continuing education