HVAC Exam Bundle (Graded A+) 2024

Absorption - Answer-A refrigeration cycle where input energy is heat Adiabatic - Answer-without gain or loss of heat Air Conditioning - Answer-controlling air temperature humidity and quality Air Cooled Condenser - Answer-a heat exchanger that transfers building heat to outdoor air Air Handler -...

A gas furnace is to be installed in a garage. The national standards require that the burners and ignition sources must be located ______ above the floor - Answer-18 inches A good description of how a bi-metal fan switch operates the blower motor on a gas furnace is - Answer-Temperature on- tempe...

Current flow is - Answer-the flow of electrons in the circuit impedance is - Answer-opposition to alternating current flow like charges - Answer-repel each other Any material that will readily release electrons is called - Answer-a conductor the symbol for current is - Answer-I Which of the fol...

Temperature - Answer-Levels of heat, the speed of molecules are traveling British thermal unit - Answer-Amount of heat To raise the temperature of 1 lbs of water 1 degree F Heat flow - Answer-Transfer from hot to cold Conduction of heat - Answer-Heat transfer from one molecule to another within a...

How many types of HVAC certifications are there? - Answer-There are 4 types. What does a metering device do? - Answer-The metering device causes a reduction in pressure, and therefore a reduction in saturation temperature. What is absorbed in the evaporator? - Answer-Heat is absorbed in the evapo...

Water boils at ______degrees celsius - Answer-100 In what direction does a vapor exert force - Answer-All How many BTUs are required to convert 27 pounds of 6°F Ice to 1398°F Steam - Answer-51,300 What is an integrated furnace control (IFC)? - Answer-An electronic module to control the operatio...

Before working on an electric furnace the tech should - Answer-Review diagram, remove jewelry, and follow safety procedures. ALL OF THE ABOVE. A GFCI circuit breaker - Answer-detects current leaks to groound the conductor in an electric heat element is usually made of - Answer-Nichrome An exampl...

What would be the most likely result of a missing AC compressor clutch diode? - Answer-Damage to the ECM Tech A says that the service fittings for R-134a are the same as the service fittings for R-12. Tech B says the low-side service fitting is a 16mm quick-connect and high-side is 13mm quick-con...

Current flow is: - Answer-The flow of electrons in the circuit. Impedance is: - Answer-Opposition to alternating current flow. Like charges; - Answer-repel each other. Any material that will readily release electrons is called; - Answer-A conductor The symbol for current is; - Answer-I Which of...

An air conditioning and refrigeration contracting company must notify the department of all licensees who have assigned their licenses to the company and must notify the department within how many calendar days when any license whose license is assigned to the company has left the company - Answe...

List at least five factors that must be controlled if a comfortable indoor environment is to be maintained. - Answer-The factors that must be controlled include temperature, humidity, air motion, dust, bacteria, odors, toxic gases, and ionization. ((Ref: 1/1)) Describe in simple terms the basic ...

The evaporator in a refrigeration system: - Answer-Is the component where refrigerant boils and absorbs heat. The purpose of the compressor is to change ___________. - Answer-Low-pressure, low-temperature vapor to a high-pressure, high temperature vapor A common refrigerant leak detection device...

Defects on gas piping or fittings shall be _____.(A) repaired(B) replaced or repaired and retested(C) repaired by a certified welder(D) ignored, as the operating pressure is much less than the air test. - Answer-B. Fitting shall be replaced or repaired and retested. UMC Section 1316.4.3 Every abs...

Sensible Heat - Answer-Causes a change of temperature in a substance. Latent heat - Answer-Heat added to a substance without a rise in temperature. Superheat - Answer-Heat added to the refrigerant in the vapor state after the evaporator process. How does a scroll compressor work? - Answer-By mean...