Hvac r Study guides, Class notes & Summaries

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 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 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 GAS HEAT MODULE FINAL EXAM 2024

HVAC-R Midterm Exam Questions With Correct Answers 100%

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 ...

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...

HVAC-R Final Exam Accurate 100%(Graded volt amps - ANSWER Transformers are normally rated in? true - ANSWER An insulated jumper may be used to temporarily jump a component in an electrical circuit(true or false)? divided by 10 - ANSWER When using a 10 wrap multiplier the reading on the meter must be? ladder diagram - ANSWER An electrical line wiring diagram is often called? pictorial diagram - ANSWER A wiring diagram that shows the approximate location of components is called? cl...

HVAC-R Midterm Exam Questions With Correct Answers 100%

HVAC UNIT 3 REVIEW TEST WITH COMPLETE SOLUTIONS Ice melts in ice boxes because a. heat flows through the insulated walls. b. heat flows through the doorway when it is opened. c. heat is moved into the box when warm food is placed in it. d. All of the above. D High-temperature refrigeration is that produced by a. heat from a furnace. b. an air-conditioning system, c. the vegetable cooling system of a refrigerator. d. the freezer section of a refrigerator. B A ton of refrigerat...