Hvac - Study guides, Class notes & Summaries

HVAC NATE Heat Pump Exam (Latest 2024 / 2025 Update) 100% Correct Questions and Verified Answers | Grade A Question: What is the capability of electronic programmable room thermostat to reset the set point early so that the space temperature reaches a set temperature at a specific time called? Answer: Computed recovery Question: What is an important reason for using electronic controls? Answer: They can make decisions based on many inputs. Question: When using a dou...

HVAC 2023 EPA 608 CORE Type 1,2,3 Exam Questions and Answers

HVAC NATE Gas Heat Exam Prep (Latest 2024 / 2025 Update) 100% Correct Questions and Verified Answers | Grade A Question: Differential pressure gauge (also called a manometer) is used to... Answer: Measure duct static pressure Question: A line voltage fuse is used to protect from... Answer: Excessive voltage Question: Forced air residential/ light commercial gas furnaces provide heat by... Answer: Circulating air across the heat exchanger Question: No mechanical fasten...

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...

F80 Exam Questions and Answers Graded A After what date was the F-24 certificate of Fitness not recognized. July 31, 2014 How often must this certificate be renewed? Every 3 years In what types of buildings and occupancies are coordinators of fire safety and alarm systems in homeless shelter required? Homeless shelters, one-way voice communication systems, or occupied for more tha n fifteen persons for a period of more than 30 days. What is the certificate of occupancy? Determines the number ...

HVAC Gas Heat Exam (Latest 2024 / 2025 Update) 100% Correct Questions and Verified Answers | Grade A Question: How does a thermocouple flame-prove a pilot flame. Answer: A thermocouple produces a small voltage when heated by the pilot flame. The thermocouple is connected to a shutoff valve. As long as the electrical current energizes the coil in the valve, the gas can flow. If the flame goes out, no current will flow and the gas valve closes, shutting off the gas. Question: What ...

HVAC Gas Heat Certification Exam (Latest 2024 / 2025 Update) 100% Correct Questions and Verified Answers | Grade A Question: A technician wraps a thermostat wire ten times around his clamp-on ammeter and measures 5.5 amps between R and W terminals on the thermostat sub-base. He should set the heat anticipator to Answer: 5.5 Question: A gas valve with 100% shut-off means Answer: Gas to a pilot and manifold is shut-off Question: A gas furnace has an electronic control...

HVAC Gas Heat Certification Exam Prep (Latest 2024 / 2025 Update) 100% Correct Questions and Verified Answers | Grade A Question: These are small burners used to ignite the gas burner on conventional gas furnaces? Answer: Pilots Question: What are the safety devices at the standing pilot? Answer: Flame Proving device, Thermocouples and Thermopiles, Bimetallic safety device and liquid filled remote bulb Question: A standard thermocouple is capable to generate how man...

HVAC-101 Intro to HVAC Questions with Complete Solutions