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RMGA Test Exam Questions And Answers
|Latest 2025 | Guaranteed Pass
Which of the following is the chemical formula for natural gas? - Answer✔CH4
What is the best method to locate a gas leak? - Answer✔Combustible Gas Detector
Is natural gas heavier than air? - Answer✔Yes
What is 2-4 times heavier than air? - Answer✔Gasoline
What component make Natural Gas "sour gas"? - Answer✔Hydrogen Sulfide
What is added to Natural Gas to give it an identified odor? - Answer✔Butyl
Mercaptan/Thiophene
T/F? When Natural Gas comes out of the ground, it has no odor? - Answer✔True
What is the flammability of Natural Gas? - Answer✔4%-14%
What temperature does Natural Gas ignite at? - Answer✔1200 degrees
How toxic is Natural Gas? - Answer✔Non-toxic
1
, ©FYNDLAY 2025 ALL RIGHTS RESERVED 8:29 AM A+
When can combustion air be taken inside a home with tight construction? - Answer✔Never
How many inches of free area are required for horizontal ducts into a mechanical room? -
Answer✔1 in.(squared) per 2,000 BTUH
How many inches of free area are required for vertical ducts into a mechanical room? -
Answer✔1 in. (squared) per 4,000 BTUH
What percentage of a wood grill is considerate to be free area? - Answer✔25%
What is the smallest single duct that would be large enough to supply air into a mechanical
room with a 153,000 BTUH? - Answer✔7 in. x 8 in. duct
What is required when converting 2 horizontal ducts to a single duct? - Answer✔A clearance of
1 in. on the back and sides and 6 in. to the front of all appliances
What is the smallest size that will meet a 43 in. (squared) free area? - Answer✔6 in. x 8 in. duct
T/F? Vertical ducts are sized the same as horizontal ducts. - Answer✔False
What size metal grill would be the smallest needed to provide a 140 in. (squared) of free area? -
Answer✔14 in. x 14 in duct
If combustion air is obtained from a crawl space, how large must the grills be? - Answer✔1
square inch per 4,000 BTUH of all appliances in the space
What size horizontal ducts would be the smallest required for a mechanical room with TWO
120,000 BTUH furnaces and a 45,000 BTUH water heater? - Answer✔12 in. x 12 in. duct
2
RMGA Test Exam Questions And Answers
|Latest 2025 | Guaranteed Pass
Which of the following is the chemical formula for natural gas? - Answer✔CH4
What is the best method to locate a gas leak? - Answer✔Combustible Gas Detector
Is natural gas heavier than air? - Answer✔Yes
What is 2-4 times heavier than air? - Answer✔Gasoline
What component make Natural Gas "sour gas"? - Answer✔Hydrogen Sulfide
What is added to Natural Gas to give it an identified odor? - Answer✔Butyl
Mercaptan/Thiophene
T/F? When Natural Gas comes out of the ground, it has no odor? - Answer✔True
What is the flammability of Natural Gas? - Answer✔4%-14%
What temperature does Natural Gas ignite at? - Answer✔1200 degrees
How toxic is Natural Gas? - Answer✔Non-toxic
1
, ©FYNDLAY 2025 ALL RIGHTS RESERVED 8:29 AM A+
When can combustion air be taken inside a home with tight construction? - Answer✔Never
How many inches of free area are required for horizontal ducts into a mechanical room? -
Answer✔1 in.(squared) per 2,000 BTUH
How many inches of free area are required for vertical ducts into a mechanical room? -
Answer✔1 in. (squared) per 4,000 BTUH
What percentage of a wood grill is considerate to be free area? - Answer✔25%
What is the smallest single duct that would be large enough to supply air into a mechanical
room with a 153,000 BTUH? - Answer✔7 in. x 8 in. duct
What is required when converting 2 horizontal ducts to a single duct? - Answer✔A clearance of
1 in. on the back and sides and 6 in. to the front of all appliances
What is the smallest size that will meet a 43 in. (squared) free area? - Answer✔6 in. x 8 in. duct
T/F? Vertical ducts are sized the same as horizontal ducts. - Answer✔False
What size metal grill would be the smallest needed to provide a 140 in. (squared) of free area? -
Answer✔14 in. x 14 in duct
If combustion air is obtained from a crawl space, how large must the grills be? - Answer✔1
square inch per 4,000 BTUH of all appliances in the space
What size horizontal ducts would be the smallest required for a mechanical room with TWO
120,000 BTUH furnaces and a 45,000 BTUH water heater? - Answer✔12 in. x 12 in. duct
2
