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2025 HVAC CONTRACTOR LICENSING
EXAM|ACTUAL 90 QUESTIONS AND VERIFIED
ANSWERS|LATEST UPDATE 2025-2026|A+GRADE
An instrument that measures potential differences between 2 points in an electrical circuit is called? A. Potentiometer B. Thermistor C. Ohmeter D. Voltmeter Voltmeter This device uses a thermal sensing bulb at the outlet of the evaporator to sense temperature and control superheat A. Automatic expansion valve B. Thermostatic expansion valve C. Low side float D. Schraeder valve Thermostatic expansion valve
When installing a reversing valve on a heat pump, how many brazed joints should be made? A. 3 B. 5 C. 4 D. 2 4 What would not be considered a misuse of a contractors license? A. Advertising under mulitple names B. Employing service technicians to work under their license C. Loaning license to more than one company D. Continue to work on an expired license Employing service technicians to work under their license What is used to prevent microbiological growth and help "dirty socky syndrome? A. Radiation B. Ultraviolet light C. Electrostatic filters
What is the minimum gauge required for a 12" galvanized steel connector used to connect a lows heat appliance? A.. B.. C.. D.. . After cutting pipes they must be reamed for what purpose? A. To clean pipe threads B. To smooth the end of the pipe C. To remove burrs and chips from the inside D. To help the threading process To remove burrs and chips from the inside In manual d what is the suggested friction (iwc) loss for hand dampers? A.. B.. C..
D..
A system with a 120 degree saturation temperature in the condenser with r- 22 has a liquid line temperature of 105 degrees. What does the temperature difference of 15 degrees represent? A. Superheat B. Wet bulb C. Subcooling D. Air temperature difference Subcooling When a technician uses a nitrogen cylinder to pressurize a system for leak detection what should be used for safety A. Hand valve B. Impervious gloves C. Pressure regulator D. Temperature gauge Pressure regulator
C. Once a month D. Routinely When absolutely necessary Refer to house 1drawing. Calculate the net summer heat gain through the east exterior wall of bedroom 1. Select the closest answer A. 115 btuh B. 338 btuh C. 326 btuh D. 1234 btuh 115 btuh Gas fitting installed in concealed locations shall be limited to which of the following A. Threaded elbows B. Tees C. Couplings D. All of the above All of the above
Recovered refrigerant may only be reused under what condition A. When it has been purified to meet ari 700 standards B. When it is used in the equipment is was removed from C. When it is recycled D. Never When is it used in the equipment is was removed from Any person who performs maintenance, service or repair that could reasonably be expected to release class 1 or class 11 refrigerants to the atmosphere would be considered what A. Maintenance personnel B. Technician C. Business owner D. Contractor Technician The unthreaded portion of piping outlets shall extend not less than ___ above floors?
The static pressure exerted in a drum of r-410a at 75 degrees f is most nearly A. 217 psig B. 125 psig C. 132 psig D. 312 psig 217 psig On a r-22 cooling unit, the suction pressure is 32.8 psig and the leaving evaporator temperature is 30 degrees. What is the system superheat? A. 3 degrees B. 12 degrees C. 40 degrees D. 20 degrees 20 degrees When performing a nitrogen pressure test on a refrigerant piping system in a unit over 20 tons, how long should the test remain on?
A. 6 hours B. 12 hours C. 1 hour D. 24 hours 24 hours In general soldering alloys melt under what temperature A. 1250 degrees f B. 112 degrees f C. 800 degrees f D. 500 degrees f 800 degrees f In section 440-x- 3 - 09 in the statute the certified contractor holding a certification with the board of heating, air conditioning and refrigeration contractors is deemed "responsible in charge" would hold what position in the company? A. Corporate officer or partner B. Regularly employed person C. Member of the llc D. Any of the above
A. The latent heat drops B. The pressure is decreased C. The pressure is increased D. The wet bulb is reduced The pressure is increased Refer to house 1 drawing and calculate the net heat gain on the north wall. The net heat gain is most nearly? A. 245 btuh B. 701 btuh C. 622 btuh D. 356 btuh 245 btuh Refer to house 1 drawing. The net heat gain through the west glazing on this house is? Select the closest answer A. 2760 btuh B. 1920 btuh C. 2134 btuh
D. 1254 btuh 2760 btuh Refer to house 1 drawing calculate the net heat loss through the ceiling in bedroom 2... The net heat loss is? A. 546 btuh B. 170 btuh C. 214 btuh D. 345 btuh 170 btuh On a natural draft furnace which of the following parts are not found A. Blower motor B. Standing pilot C. Limit switch D. Induced draft motor Induced draft motor Residential thermostats operate with which of the following
4 cfm Outdoor combustion air shall be provided through an opening not less than A. 10" B. 3" C. 2" D. 24" 3" Low line voltage at the compressor will result in what condition A. High motor current B. High motor temperature C. Low motor current D. Both a and b Both a and b The maximum continuous noise exposure level to a power tool operating at 96 decibels before requiring hearing protection is?
A. 2 hours B. 8 hours C. 4 hours D. 3 hours 3 hours All but which of the following components would you find on a high efficiency gas furnace A. Hot surface igniter B. Direct spark igniter C. Standing pilot D. Combustion vacuum switch Standing pilot Where is the proper placement of a residential thermostat A. Near the supply outlets B. Near the return grille C. In the kitchen D. Does not matter Near the return grille
B. B
C. C
D. D
C
A connector shall not be smaller than? A. The flue collar of the appliance B. 4" C. 3" D. 6" The flue collar of the appliance The primary purpose of the contents of manual d is best described as A. Matching the system size to the existing duct system B. Designing a proper duct system for commercial application C. Designing the correct fans and controls for a system D. Properly designing an air distribution system for residential using the blower supplied with the equipment Properly designing an air distribution system for residential using the blower supplied with the equipment
To prevent possible electrocution from power tools it is recommended that the technician utilize a? A. Voltmeter B. Flat extension cord with ground C. Ground fault circuit interrupter D. An extension cord with large gauge wires Ground fault circuit interrupter What is the saturation temperature of r-410a at 316 psig A. 120 degrees B. 40 degrees C. 100 degrees D. 135 degrees 100 degrees Refer to house drawing 1: what is the net summer heat gain through the east exterior wall of bedroom 1? Select the nearest answer
