Esco Study guides, Class notes & Summaries

R410a Test Questions and Answers 100% Solved Recovery cylinders used with R410 must have a DOT rating of... ️️DOT 4BA 400 DOT 4BW 400 When charging an R410a system that uses a thermostatic expansion valve, proper charge can be determined by measuring... ️️Subcooling When charging an R410a system that uses a capillary tube or a fixed metering device, proper charge can be determined by measuring... ️️Superheat Compressor internal pressure relief settings for R410a systems ar...

R-410a Refrigerant Study Guide Questions and Answers 100% Solved R-410A is a Refrigerant, also known as....? ️️SUVA - 410A....... AZ-20......Puron The cylinder color code for R-410A is...? ️️Rose HCFC-22 is scheduled for total phase out, by the year? ️️2020 Suction and Discharge pressures for R-410A are how much higher than R-22 Systems? ️️40% to 70% What is Temperature Glide? ️️A range of condensing and evaporating temperatures for one pressure. When handling Ref...

HVAC Final Exam Electrical For Air Conditioning Questions and Answers 100% Solved When using a low voltage T-stat for heating and cooling, when would there be a jumper between Rh and Rc? Select one: a. When using a single transformer system b. When heating with an oil boiler c. When heating with a gas boiler d. When using a two transformer system ️️A) When Using a single transformer system Digital thermostats usually display temperature, time of day, programming and operating

NATE Heat Pump Exam with Complete Solutions Charging a heat pump with refrigerant is best accomplished in the _______ mode. A: Heating mode B: Cooling mode C: Defrost mode D: Emergency heating mode ️️B: Cooling mode Heat pumps can provide both heating in the winter and cooling in the summer. In which mode is the heat pump more efficient? A: Heating mode B: Cooling mode C: Defrost mode D: Emergency heating mode ️️A: Heating mode Which of the following components is exclusiv...

Gas Heat ESCO exam with Complete Solutions 100% Verified A gas furnace to be installed in a garage. The national standards requires that the burners and ignition must be located ____ above the floor: ️️18 inches A good description of how a bi-metal fan switch operates the blower motor on a gas furnace is: ️️Temperature on/ Temperature off Redundant gas valves used on gas furnaces will shut down if gas pressure exceeds: ️️13.5 in W.C. (or 1/2 psi) This is the maximum pres...

HVAC: EPA 608 Certification Study Guide Questions and Answers 100% Solved Are there drop-in replacements for R-12 systems? Why or why not? ️️No because the new refrigerants are incompatible with the oils and lubricants used in R-12 systems. What type of oil is used in R-134a and what oils will it mix with? ️️Ester based oils and they do not mix with other oils What type of lubricant is used with HCFCs? ️️Alkylbenzene lubricant What is difference b/w ternary blend a azeotropi...

HVACR gas heating ESCO Questions and Answers 100% Solved using an ohmmeter, there is 120 VAC between high speed and ground wires, this indicates ️️open if temperature rise is too high... ️️increase fan speed how many of the 3 OSHA conditions defining confined spaces must be met ️️all 3 what causes the temperature limit safety switch to shut off the burner ️️fan motor failure flashback indicates ️️the gas is flowing slower than the speed at which burn is occurring wh...

HVAC Air Condition Esco 2024/2025 Questions and Answers 100% Solved Heat which causes a change in temperature of a substance is called ️️Sensible Heat Heat added to a substance without a rise in temperature is called ️️Latent Heat Heat added to refrigerant in a vapor state after the evaporation process is called ️️Superheat A scroll compressor moved refrigerant by means of ️️Involute spirals The movement of heat by way of fluid is called ️️Convection

NATE: Air Conditioning Troubleshooting Test Questions and Answers 100% Solved What are the symptoms of a TXV air conditioning system if it has lost its charge: ️️The superheat will increase and the low-side pressure will decrease A customer who owns a split air conditioning system complains that his system has been running but his house doesn't seem to be cooling properly. When the service technician arrives on the job, he or she finds that the indoor blower is operating and the ...

ESCO Study set- gas furnaces Test Questions and Answers 100% Solved Burning one cubic foot of natural gas will produce approximately _____ BTU's ️️900- 1,100 BTU The National Fuel Gas Code classifies a vent system for a condensing furnace as; ️️Category IV what type of draft is used to move flue gas through the heat exchanger and into the venting system in modern gas-fired furnaces? ️️Mechanical A customer complains that a 2 year- old, direct, hot surface ignition furnac...