Hvac r Study guides, Class notes & Summaries
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HVAC: EPA 608 Certification Study Guide Questions and Answers | Latest Version | 2024/2025 | Rated A+
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HVAC: EPA 608 Certification Study 
Guide Questions and Answers | Latest 
Version | 2024/2025 | Rated A+ 
 
Are there alternative refrigerants that can be directly used in systems originally designed for R- 
12? Why or why not? 
 
No, because these new refrigerants are not compatible with the lubricants and oils used in R- 
12 systems. 
 
Explanation: The oils and lubricants in R-12 systems cannot properly interact with newer 
refrigerants, making direct replacements unfeasible. 
 
What type of o...
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BOMA – HVAC QUESTIONS AND ANSWERS 100% PASS
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BOMA – HVAC QUESTIONS AND 
 
ANSWERS 100% PASS 
 
Two basic categories of chillers are the 
compression cycle and absorption 
The five requirements for comfort are proper temperature, humidity, filtration, and ventilation 
circulation 
The primary function of an expansion device is to 
produce a reduction in the pressure on the liquid refrigerant, regulate the flow of refrigerant into 
the evaporator, lower the boiling point of the refrigerant far enough below the temperature of the 
load to g...
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Michigan Builders License Exam Questions With Correct Answers
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Created to serve as a complete, comprehensive code regulating the construction of single-family, two-family and buildings consisting of three or more townhouse units. - Answer IRC (International Residential Code) 
 
Administrative - Answer First 2 chapters of code book are 
 
True - Answer Plans or supporting documents are almost always required by the controlling authority prior to issuing a permit. T or F 
 
Yes - Answer Does the building official have the authority to render interpretations o...
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HVAC Electric Review 2 Test Questions with Correct Solutions, A+
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Resistance is? - Opposition to current flow 
 
An electron has? - A negative charge 
 
Impedance is? - Opposition to alternating current flow 
 
Current flow is? - Electron flow in a circuit 
 
The safety ground conductor is usually color coded? - Green or bare. 
 
Like charges? - Repel each other 
 
The symbol for current is? - I 
 
Any material that will readily release electrons is called? - A conductor 
 
Which of the following materials would be best suited for use a...
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AC Review HVAC Questions & 100% Verified Answers | Latest Update | Already Graded A+
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Heat which causes a change in temperature of a substance is called; 
: Sensible Heat. 
heat added to substance without a rise in temperature; (example: liquid refrigerant to 
gas) this process is called? 
: Latent heat of vaporization. 
Heat added to the refrigerant in a vapor state after the evaporation process is called; 
: Superheat. 
A scroll compressor move refrigerant by means of; 
: Involute Spirals. 
The movement of heat by way of fluid (or air) is called; 
: Convection. 
The movement o...
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AC Review HVAC Exam Questions And Answers
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Heat which causes a change in temperature of a substance is called; - ans-Sensible Heat. 
 
heat added to substance without a rise in temperature; (example: liquid refrigerant to gas) this process is called? - ans-Latent heat of vaporization. 
 
Heat added to the refrigerant in a vapor state after the evaporation process is called; - ans-Superheat. 
 
A scroll compressor move refrigerant by means of; - ans-Involute Spirals. 
 
The movement of heat by way of fluid (or air) is call...
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HVAC Electric Review 2 Questions & Answers 100% Correct!
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Resistance is? - ANSWEROpposition to current flow 
 
An electron has? - ANSWERA negative charge 
 
Impedance is? - ANSWEROpposition to alternating current flow 
 
Current flow is? - ANSWERElectron flow in a circuit 
 
The safety ground conductor is usually color coded? - ANSWERGreen or bare. 
 
Like charges? - ANSWERRepel each other 
 
The symbol for current is? - ANSWERI 
 
Any material that will readily release electrons is called? - ANSWERA conductor 
 
Which of the following materials would ...
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HVAC REVIEW EXAM QUESTIONS WITH 100% CORRECT SOLUTIONS ALREADY PASSED!!
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The high and low pressures in a refrigerant system are separated by the : - Answer-COMPRESSOR & 
METERING DEVICE. 
The pressure at which the refrigerant changes state from a vapor to a liquid is the : - AnswerCONDENSING PRESSURE. 
A pressure gauge placed anywhere from the metering device to the compressor will read: - AnswerTHE LOW SIDE OR EVAPORATING PRESSURE. 
The most common refrigerants exist either in : - Answer-BOTH (A&B) A. SATUARATED VAPOR & 
B.SATURATED LIQUID STATE. 
In a operating sys...
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HVAC NATE Heat Pump Exam 2024 Correctly Answered!
- Exam (elaborations) • 17 pages • 2023
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HVAC NATE Heat Pump Exam 2024 Correctly Answered! 
On an R-22 system, line diameters and lengths are typically specified for a vapor pressure drop that does not exceed what? - ANSWER 6-7PSI or 6F
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CDC: 3E151 - HVAC/R JOURNEYMAN VOLUME 5 (VOLUME 5 - COOLING AND REFRIGERATION SYSTEMS) SCORED A+
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CDC: 3E151 - HVAC/R JOURNEYMAN VOLUME 5 (VOLUME 5 - COOLING AND REFRIGERATION SYSTEMS) SCORED A+
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