NV HVAC Contractor flashcards
NV HVAC Contractor · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- C-21 license
- A Nevada specialty contractor license classification that permits the licensee to perform refrigeration and air conditioning work, including installation, maintenance, and repair.
- Qualifying party
- An individual who meets the experience and examination requirements and is actively engaged in the contracting business, allowing a company to obtain a contractor license.
- Bid limit
- The maximum dollar amount of a single contract that a specialty contractor may undertake, set by the Nevada State Contractors Board based on financial statements and experience.
- License renewal
- Nevada contractor licenses must be renewed every two years; failure to renew results in expiration and requires reapplication or reinstatement with fees and penalties.
- AFUE
- Annual Fuel Utilization Efficiency, a measure of the seasonal efficiency of a furnace or boiler, expressed as a percentage of fuel converted to heat.
- SEER2
- Seasonal Energy Efficiency Ratio 2, a revised metric for central air conditioner efficiency that uses a more realistic duct static pressure and fan power model.
- Heat pump balance point
- The outdoor temperature at which a heat pump's heating capacity equals the building's heat loss; below this point, supplementary heating is required to maintain indoor temperature.
- Condensing furnace
- A high-efficiency furnace that condenses water vapor in the flue gases to extract additional heat, achieving AFUE of 90% or higher, and requires PVC venting and condensate disposal.
- Manual J
- An ACCA method for calculating residential heating and cooling loads, accounting for building envelope, orientation, infiltration, and internal gains.
- Manual D
- An ACCA procedure for designing residential duct systems, determining duct sizes based on available static pressure, friction rate, and equivalent length.
- Equivalent length
- The total effective length of a duct run that accounts for both straight duct and the pressure loss of fittings, used to calculate friction rate for duct sizing.
- Throw
- The distance a supply air jet travels from an outlet before its velocity drops to a specified terminal value, typically 50 feet per minute.
- Superheat
- The temperature of refrigerant vapor above its saturation temperature at a given pressure, used to verify proper charge and ensure no liquid enters the compressor.
- Subcooling
- The temperature of liquid refrigerant below its saturation temperature at a given pressure, used to verify proper charge and ensure solid liquid reaches the expansion valve.
- EPA Section 608
- The federal regulation that governs the safe handling and disposal of refrigerants, requiring technician certification and prohibiting venting of ozone-depleting refrigerants and their substitutes.
- A2L refrigerant
- A refrigerant safety classification indicating lower toxicity and lower flammability, such as R-32 and R-1234yf, requiring specific handling and installation precautions.
- Locked rotor amps
- The maximum current a motor draws when its rotor is stationary and full voltage is applied, used for sizing electrical components and protection devices.
- C-wire
- The common wire in a low-voltage thermostat circuit that provides continuous 24V power to the thermostat, required for smart thermostats and some programmable models.
- VFD
- Variable Frequency Drive, an electronic device that controls the speed of an AC motor by varying the frequency and voltage, improving energy efficiency at part-load conditions.
- Defrost control
- A device or circuit in a heat pump that initiates defrost cycles to remove frost from the outdoor coil, using time-temperature or demand-based methods.
- Evacuation
- The process of removing moisture and non-condensables from a refrigeration system using a vacuum pump, typically to 500 microns or lower, before charging.
- Weigh-in charging
- A method of charging a refrigeration system by measuring the exact weight of refrigerant added, used for split systems and when nameplate charge is known.
- Duct leakage test
- A procedure that pressurizes a duct system to a specified pressure (e.g., 25 Pa) and measures airflow loss to quantify and locate leaks.
- Combustion analysis
- The measurement of flue gas composition (CO, CO2, O2) and temperature to verify proper combustion, efficiency, and venting of fuel-burning appliances.
- Preliminary notice
- A written notice that must be sent by a contractor to preserve lien rights on a private construction project in Nevada, typically within 20 days of starting work.
- Lien rights
- The legal right of a contractor or supplier to place a claim against a property for unpaid work or materials, subject to strict notice and filing deadlines.
- OSHA fall protection
- Regulatory requirement that workers exposed to falls of 6 feet or more must be protected by guardrails, safety nets, or personal fall arrest systems.
- Change order
- A written modification to a construction contract that alters the scope, price, or schedule, and must be signed by authorized parties before work proceeds.
- Prompt payment
- Nevada law requiring owners to pay undisputed invoices within 30 days of receipt, and contractors to pay subcontractors within 7 days of receiving payment.
- Performance bond
- A surety bond that guarantees a contractor will complete a project according to the contract terms, often required on public works projects.
- Critical path method
- A project scheduling technique that identifies the longest sequence of dependent tasks to determine the minimum project duration and prioritize resource allocation.
- Recordkeeping
- Nevada requires contractors to maintain payroll records, contracts, and change orders for at least three years for audit and compliance purposes.