RMGA EXAM1 2025 UPDATED QUESTIONS AND ANSWERS
How heavy is gasoline vapor? - CORRECT ANSWER✅✅✅2-4 times weight of air
What is the most harmful byproduct of combustion? - CORRECT ANSWER✅✅✅Carbon Monoxide
What is the ignition temperature of natural gas? - CORRECT ANSWER✅✅✅1100-1200 degrees
Farenheit
What is the density of propane vapor? - CORRECT ANSWER✅✅✅1.56
What are the byproducts of combustion? - CORRECT ANSWER✅✅✅CO2, Water Vapor, Heat
What is the ratio for complete combustion of natural gas? - CORRECT ANSWER✅✅✅1 part natural
gas to 10 part air
What is the maximum length of a flexible gas connector going to a furnace? - CORRECT
ANSWER✅✅✅6 feet
What are the materials that can be used for piping natural gas? (4) - CORRECT
ANSWER✅✅✅Iron/steel, galvanize/black, CSST, Polyethylene
What is an anode used for? - CORRECT ANSWER✅✅✅To provide cathodic protection
What type of gas appliance is not require to have a shut off valve located in the same room? - CORRECT
ANSWER✅✅✅Decorative appliance and room heaters
How close should a shut off valve be located to an appliance? - CORRECT ANSWER✅✅✅Within 6
feet of the appliance and in the same room
, What is the minimum pipe size to a furnace and water heater location requested by Dominion? -
CORRECT ANSWER✅✅✅1"
What is the maximum pressure allowed before the use of welded joints is required? - CORRECT
ANSWER✅✅✅5 PSIG
When is a tracer wire used? - CORRECT ANSWER✅✅✅For underground non-metallic (plastic) gas
lines
What methods can be used to join plastic gas pipe? - CORRECT ANSWER✅✅✅Approved mechanical
fittings and heat fusion
On an elevated pressure system, where are shut off valves required? - CORRECT
ANSWER✅✅✅Upstream of MP regulator
What type of fittings can not be concealed? (7) - CORRECT ANSWER✅✅✅Unions, bushings,
regulators, shut off valves, flex connectors, gas hoses, automatic valves
When using a meter for spot testing, how long should the half cubic foot dial be watched? - CORRECT
ANSWER✅✅✅5 minutes
How is CSST protected from puncture threats? - CORRECT ANSWER✅✅✅striker plates
How much earth cover must underground fuel lines have? - CORRECT ANSWER✅✅✅12"
What should the test pressure be on a one PSI pressure system? - CORRECT ANSWER✅✅✅1.5x
working pressure with 3 PSIG for 10 minutes
If the most remote appliance is 125 ft from the GM, what size branch line is needed for a 120,000 BTUH
furnace on a 4 oz. system located in SLC? - CORRECT ANSWER✅✅✅120,000/890 = 134 CFH = 1"
How heavy is gasoline vapor? - CORRECT ANSWER✅✅✅2-4 times weight of air
What is the most harmful byproduct of combustion? - CORRECT ANSWER✅✅✅Carbon Monoxide
What is the ignition temperature of natural gas? - CORRECT ANSWER✅✅✅1100-1200 degrees
Farenheit
What is the density of propane vapor? - CORRECT ANSWER✅✅✅1.56
What are the byproducts of combustion? - CORRECT ANSWER✅✅✅CO2, Water Vapor, Heat
What is the ratio for complete combustion of natural gas? - CORRECT ANSWER✅✅✅1 part natural
gas to 10 part air
What is the maximum length of a flexible gas connector going to a furnace? - CORRECT
ANSWER✅✅✅6 feet
What are the materials that can be used for piping natural gas? (4) - CORRECT
ANSWER✅✅✅Iron/steel, galvanize/black, CSST, Polyethylene
What is an anode used for? - CORRECT ANSWER✅✅✅To provide cathodic protection
What type of gas appliance is not require to have a shut off valve located in the same room? - CORRECT
ANSWER✅✅✅Decorative appliance and room heaters
How close should a shut off valve be located to an appliance? - CORRECT ANSWER✅✅✅Within 6
feet of the appliance and in the same room
, What is the minimum pipe size to a furnace and water heater location requested by Dominion? -
CORRECT ANSWER✅✅✅1"
What is the maximum pressure allowed before the use of welded joints is required? - CORRECT
ANSWER✅✅✅5 PSIG
When is a tracer wire used? - CORRECT ANSWER✅✅✅For underground non-metallic (plastic) gas
lines
What methods can be used to join plastic gas pipe? - CORRECT ANSWER✅✅✅Approved mechanical
fittings and heat fusion
On an elevated pressure system, where are shut off valves required? - CORRECT
ANSWER✅✅✅Upstream of MP regulator
What type of fittings can not be concealed? (7) - CORRECT ANSWER✅✅✅Unions, bushings,
regulators, shut off valves, flex connectors, gas hoses, automatic valves
When using a meter for spot testing, how long should the half cubic foot dial be watched? - CORRECT
ANSWER✅✅✅5 minutes
How is CSST protected from puncture threats? - CORRECT ANSWER✅✅✅striker plates
How much earth cover must underground fuel lines have? - CORRECT ANSWER✅✅✅12"
What should the test pressure be on a one PSI pressure system? - CORRECT ANSWER✅✅✅1.5x
working pressure with 3 PSIG for 10 minutes
If the most remote appliance is 125 ft from the GM, what size branch line is needed for a 120,000 BTUH
furnace on a 4 oz. system located in SLC? - CORRECT ANSWER✅✅✅120,000/890 = 134 CFH = 1"
