Kentucky HVAC Journeyman Exam Prep FREE Sample Exam

On a 45-degree rainy day a heat pump defrosts every 30 minutes even though the outdoor coil shows little frost, wasting energy and cycling the strip heat each time. The coil sensor is firmly clipped to its tube and its wiring is intact. What control behavior is the journeyman checking?

Whether the defrost control is a demand type reading a mis-scaled sensor value, or a time-temperature type set to initiate on elapsed time regardless of frost need

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Whether the indoor thermostat is calling for cooling between heating cycles and forcing the valve to shift over, using the values and conditions given in the problem statement itself

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Whether the crankcase heater is oversized and warming the coil sensor through the outdoor unit's base pan metal

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Whether the outdoor fan blade is pitched for summer duty and pushing frost-forming air across the coil too fast

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A split system is factory-charged for a 15-foot line set. The installed line set measures 40 feet, and the manufacturer instructions direct adding 0.6 ounce of refrigerant per foot of line beyond 15 feet. How much additional charge must be weighed in?

24 ounces, figured by applying the per-foot rate to the entire 40-foot length of the line set

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15 ounces, figured by applying the per-foot rate to the 25 feet beyond the factory-charged length

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9 ounces, figured by applying the per-foot rate only to the 15 feet covered by the factory charge

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40 ounces, figured by adding one full ounce for every foot of line set installed at the home

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A heat pump air handler is located in an attic. In addition to an access opening large enough to remove the appliance, what working provision is required at the appliance?

A permanent ladder bolted to the ceiling joists directly below the attic access opening for the life of the unit

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A hoist beam rated for the weight of the appliance, installed over the unit for future compressor change-outs

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A second access opening at the far end of the attic so the technician can exit without turning around

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A level working platform at least 30 inches by 30 inches in front of the service side of the appliance

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A supply duct must run underground beneath a slab-on-grade addition. Which construction is required?

Standard galvanized duct wrapped in plastic sheeting, laid level so condensate can collect evenly along the run

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Unsealed fiberboard duct, because soil moisture keeps the board pliable and prevents it from cracking over time

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Approved watertight, corrosion-resistant material with sealed joints, sloped to drain to an accessible point

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Flexible duct pulled through a larger PVC sleeve, with the annular space left open as an insulation air gap

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A combustion air opening must provide 50 square inches of net free area and will be covered by a wood louver. Wood louvers may be assumed to have 25 percent free area. What gross louver area is required?

200 square inches of gross louver area to deliver the required 50 square inches of net free area

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100 square inches of gross louver area, figured by doubling the required net free area once

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67 square inches of gross louver area, figured with the free-area percentage used for metal louvers

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50 square inches of gross louver area, treating the louver face area as fully open to airflow

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What is the maximum developed length permitted for a residential clothes dryer exhaust duct, before any reduction for fittings, where the manufacturer’s instructions do not specify a different length?

25 feet, a limit borrowed from the maximum length allowed for a dryer's flexible transition duct assembly, measured from the back of the dryer cabinet to the wall cap

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15 feet, because dryer ducts are limited to the same developed length as a bathroom exhaust fan duct run

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35 feet from the dryer transition duct connection to the outdoor termination, before fitting reductions apply

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50 feet, provided the duct is one size larger than the dryer outlet for the entire length of the exhaust run

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A digital thermostat resets and clicks the contactor in and out whenever the cooling call is heavy, and the problem began when the old mercury thermostat was replaced without adding a wire. The transformer and contactor test good. What is the likely wiring deficiency?

The thermostat has no dedicated common (C) conductor, so it power-steals through the load and browns out under call load

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The thermostat cable has one conductor too many landed, which forces the control board to share its fuse with the stat, checked against the manufacturer's data for the equipment on site

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The outdoor unit is missing its equipment ground, which makes the thermostat display reset on every cooling cycle

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The thermostat is mounted level, which prevents a digital stat from holding a steady supply voltage during calls

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A journeyman joins two copper refrigerant tubes with a filler metal that melts at 1,100 degrees Fahrenheit and flows into the closely fitted joint by capillary action. How is this joining process classified, and what follows for the joint?

It is soldering, since any filler that flows by capillary action into a copper joint is classified as a solder

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It is brazing, since the filler melts above 840 degrees, and the joint is made with a nitrogen purge flowing during heating

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It is welding, since the base copper tubes themselves melt and fuse together at the joint during the heating cycle

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It is soft soldering with a high-temperature alloy, classified by the torch used rather than by the filler melting point, with the system running steadily under the stated operating load

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At commissioning, a blower is rated to deliver the design airflow at 0.50 inch water column total external static. The wet coil drops 0.20 inch and the filter drops 0.08 inch at design airflow. How much static pressure remains for the duct system itself?

0.22 inch, found by subtracting the coil and filter drops from the blower's rated total external static pressure

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0.78 inch, found by adding the coil and filter drops on top of the blower's rated total external static pressure

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0.50 inch, since the duct system always receives the full blower rating regardless of the devices in the airstream

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0.12 inch, found by subtracting only the filter drop from a coil rating that was never part of the static budget

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A condensate line drains by gravity to its termination. A running trap sits at the unit outlet, and an open vent tee stands on the downstream side of the trap. How is this arrangement judged?

It is wrong, since a vent placed anywhere in a condensate line breaks the trap seal and must be removed entirely

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It is wrong, since the vent must stand between the unit outlet and the trap to let pan air escape ahead of the seal

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It is correct, since the vent downstream of the trap lets the line drain freely while the trap seal stays intact

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It is correct only in cooling season, since in heating season the same vent must be capped to hold the trap prime

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A licensed journeyman wants to advertise under a personal business name and sign a contract directly with a homeowner for a system change-out. What is the correct position?

It is permitted, because a journeyman license carries the same right to advertise and contract as a master license holds

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It is permitted if the journeyman carries the required insurance, because insurance alone confers contracting authority

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It is permitted for jobs under a set dollar amount, because small residential change-outs fall outside the contracting rules

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It is not permitted: a journeyman performs HVAC work under a master's supervision, direction, and responsibility, and only a licensed master may advertise and practice HVAC contracting and obtain the permits for the work

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A journeyman plans continuing education before renewal: 6 hours are needed, including 3 hours of safety training the licensee hopes to count in full. Which statement correctly applies the CE rules?

Eight hours are required each year, and all 3 safety hours count, because safety is the most heavily weighted CE category

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Six hours are required, every approved hour equals 60 minutes of instruction, and safety hours count without any yearly limit

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Six hours of approved CE are required in the 12 months before renewal, an hour of class is 50 minutes of instruction, and no more than 2 hours of safety practices and procedures per year count toward the requirement, so only 2 of the 3 safety hours apply

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Six hours are required only every third renewal, so the licensee may bank this year's safety course against a renewal two cycles away without any carry-forward limit applying

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Kentucky HVAC Journeyman Exam Prep FREE Sample Exam — Fixed Set

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