Hvac r - Study guides, Class notes & Summaries

boiler heats up hot water w/ a series of piping and circulates it - ANSWER-How does a hot water heating system operate? Uses a burner to heat the heat exchanger and uses a blower to blow across heat exchanger to travel to air duct work - ANSWER-How does a warm air heating system operate? 1. propane (LP) 2. coal 3. fuel oil - ANSWER-What are three types of fossil fuel? wax crystals form, gels up and the viscosity of the oil goes up - ANSWER-What happens to fuel oil when it is stored ou...

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

HVAC/R GAS HEAT MODULE FINAL EXAM 2024

HVAC NATE Heat Pump Exam (New 2024/ 2025 Update) Questions and Verified Answers 100% Correct | A Grade QUESTION In order to troubleshoot a load controlled by a control string, what should the technician check first? Answer: Proper voltage applied across the load. QUESTION The technician suspects that an outdoor thermostat used to bring on auxiliary heat may be out of calibration. The thermostat is a close-on-fall type that is adjustable. What is one method for ...

HVAC-R Midterm Exam Questions With Correct Answers 100%

On an R-22 system, line diameters and lengths are typically specified for a vapor pressure drop that does not exceed what? - ANSWER6-7PSI or 6F What is the primary purpose of using flux when soldering copper or brass parts? - ANSWERPrevent Oxidation The water that results from a defrost cycle of an air to air heat pump(runoff) must? - ANSWERDrain off and away from the outdoor coil. Why must the runoff be drained off and away from the outdoor coil? - ANSWERExcessive ice can build up on t...

HVAC RIGGING Written Exam 2024. The rated capacity is the ______ load weight that the sling is designed to carry. - CORRECT ANSWER maximum Slings are often made of ______ chain or wire rope material. - CORRECT ANSWER synthetic Most alloy chain slings can be used in temperatures up to_____ ______ ______ . - CORRECT ANSWER 500 degrees F When the tail has been pulled into the jacket, it indicates that the sling may have been______. - CORRECT ANSWER overloaded Like other slings, wire ...

True - ANSWER Copper wire bend easily, has good mechanical strength, resists corrosion, and can be easily joined. True - ANSWER Aluminum is a good conductor of electricity, however, it has a tendency to corrode. False - ANSWER Voltage drop in a conductor is of least importance when sizing wire. False - ANSWER The maximum recommended voltage drop for a branch circuit is eight percent. False - ANSWER The allowable voltage drop of most manufacturers is 15% below the nameplate rating. ...

HVAC-R Midterm Exam Questions With Correct Answers 100%

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 substance or both substances are in contact with touching Convection of heat - Answer-Heat transfer from one place to another place using water, air or steam Radiant heat - Answer-Heat that passes...