G2 gas technician Study guides, Class notes & Summaries

G2 Gas Technician Module 23 Revised with Verified Answers Why are air cleaners installed ahead of heating or cooling coils and air conditioners? To protect the equipment from dust and increase efficiency What are two ways in which a mechanical filter could restrict air flow? Dirty Air Filter and Incorrect Air Filter Name three types of air cleaners that can be used with a forced-air furnace? Media, electrostatic, and electronic Which type of air cleaner is usually the least expensive? Media/M...

G2 Gas Technician Module 12 Revised Already Passed What does an Aquastat do? Its an automatic operating switch (normally open). Sense water temperature of a boiler and closes when temperature drops. What does a low water cut off do? Automatic safety control (normally closed). Senses water level in the boiler. If level drops the switch opens and shuts off the gas valve. What does a water flow switch do? Automatic safety control (normally open). Senses water flow and switch closes, in series wit...

G2 Gas Technician Module 22 Revised 100% Pass What pressure does atmospheric pressure exert on the earth at sea level? 14.74 psia What two things mean you must bring in combustion air. 1. Total BTU of appliance if greater than 400000 you must bring in combustion air. 2. If house is tight construction you also must bring in air. What is the maximum flue gases should be for a natural draft system? Why? 450 F is the max this is because safety concerns of having high heat in a combustible building...

G2 Gas Technician Module 17 Revised (2023/2024) 100% Pass What are the factors governing a conversion? Availability of gas, efficiency if converted, access to combustible air, satisfactory ductwork, can a chimney liner be installed, clearances from combustibles, manufactures recommendations, if a water heater is also being installed (common vent or power vent), and age of the appliance Oil fired furnaces are recommended not to be converted at a certain age what is age is this? 10 years clause 4...

G2 Gas Technician Module 14 Revised Already Passed What is a typical electrical connection for a gas range? 120 V 60 HZ, two-wire with a ground. What must a flex connector be connected to? What else must be there? Must be connected to rigid pipe with a shut off valve immediately upstream of the connector. What types of appliances must use a flexible metal connector? Appliances that vibrate, expand and contract or other movements that could damage a rigid connection. What is the maximum length...

G2 Gas Technician Module 20 Revised Questions 100% Pass What prevents the water in a hydronic heating system from boiling into steam when the system is operating above the atmospheric temperature? Pressurization of the system List the four subsystems of a hydronic space heating system? Heat Source, Circulation system, Heat Emitters, Control system What must be done to protect the potable water supply to a hot water boiler? Approved backflow preventer installed in the water supply Above what ...

G2 Gas Technician Module 13 Revised (2024/2025) Already Passed If inadequate combustion air is in a tightly sealed house what happens? Potenially leads to severe indoor air quality problems When changing a part of the heating system what 4 factors must the gas technician take into account? The building envelope, external environment, mechanical systems, and occupants What comprises the building envelope? Foundation and floor slabs, walls, roofs, and windows and doors What does the skin in the...

The best tool for adjusting and setting the pressure on an appliance regulator: a. Manometer b. Velometer c. Psychrometer d. An analyzer - Manometer 3/8 NPS black iron pipe shall? a. Not be used for propane b. Not be used in a concealed location c. Not be used for natural gas d. Not be used for indoors - Not be used in a concealed location (6.3.9) A corrugated metal gas connector connected to a range must not exceed?

G2 Gas Technician Module 12 Revised Exam Questions and answers with 100% Complete Solutions | verified &updated 2024

G2 Gas Technician Module 12 Exam Questions and answers with 100% Complete Solutions | verified &updated 2024