CO Gas Piping Contractor Exam
Practice Questions And Correct
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Rationale 2027 Q&A| Instant
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1. Which code is most directly concerned with the installation of fuel-
gas piping systems serving buildings in jurisdictions that adopt the
International Fuel Gas Code (IFGC)?
A. International Residential Code only
B. International Fuel Gas Code
C. International Energy Conservation Code
D. International Existing Building Code
B. International Fuel Gas Code
The International Fuel Gas Code establishes requirements for the design,
installation, inspection, testing, and maintenance of fuel-gas piping and
related equipment in covered buildings.
2. Before installing a new natural-gas piping system, what is the most
important first step in determining applicable requirements?
A. Select the pipe color
B. Determine the governing code, adopted amendments, and local
requirements
, C. Install the largest available pipe
D. Determine the appliance manufacturer's warranty period
B. Determine the governing code, adopted amendments, and local
requirements
Fuel-gas installations must comply with the code and amendments
adopted by the applicable authority having jurisdiction, so determining
the governing requirements is fundamental before design or installation
begins.
3. What is the primary purpose of a gas piping sizing calculation?
A. To minimize the number of fittings
B. To ensure adequate gas flow and pressure is delivered to
connected appliances
C. To determine the color of the piping
D. To eliminate the need for regulators
B. To ensure adequate gas flow and pressure is delivered to connected
appliances
Proper sizing ensures that the piping can deliver the required gas
volume at an acceptable pressure drop while all connected appliances
operate correctly.
4. When sizing a gas piping system, which information is generally
essential?
A. Appliance input ratings, developed length, allowable pressure
drop, and gas characteristics
, B. Paint color and wall thickness
C. Building owner's occupation
D. Appliance serial numbers only
A. Appliance input ratings, developed length, allowable pressure drop,
and gas characteristics
Gas-piping sizing depends on the connected appliance demand and the
physical and operating characteristics of the piping system.
5. An appliance has an input rating of 100,000 Btu/h. Approximately
how many cubic feet per hour of natural gas would be required if
natural gas is assumed to contain 1,000 Btu per cubic foot?
A. 10 CFH
B. 50 CFH
C. 100 CFH
D. 1,000 CFH
C. 100 CFH
Dividing 100,000 Btu/h by approximately 1,000 Btu per cubic foot gives
an estimated demand of 100 cubic feet per hour.
6. In a typical gas-piping sizing procedure, the total demand
downstream of a branch point is determined by:
A. Adding the input ratings of appliances supplied by that section
B. Using only the largest appliance
C. Using the smallest appliance
D. Dividing all appliance ratings by pipe diameter
, A. Adding the input ratings of appliances supplied by that section
Each piping section must be capable of supplying the combined demand
of the appliances served downstream of that section.
7. What does "developed length" generally mean when sizing fuel-gas
piping?
A. The straight-line distance between the meter and appliance
B. The measured length of the piping route, accounting for the
actual developed path
C. The outside diameter of the pipe
D. The length of pipe purchased from the supplier
B. The measured length of the piping route, accounting for the actual
developed path
Developed length follows the actual piping route rather than simply
measuring the direct distance between two points.
8. Why does excessive pressure drop in a gas piping system create a
potential operating problem?
A. It increases pipe weight
B. It can prevent appliances from receiving adequate gas pressure
for proper operation
C. It automatically increases gas heating value
D. It eliminates combustion air requirements
B. It can prevent appliances from receiving adequate gas pressure for
proper operation
Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant
Download Pdf.
1. Which code is most directly concerned with the installation of fuel-
gas piping systems serving buildings in jurisdictions that adopt the
International Fuel Gas Code (IFGC)?
A. International Residential Code only
B. International Fuel Gas Code
C. International Energy Conservation Code
D. International Existing Building Code
B. International Fuel Gas Code
The International Fuel Gas Code establishes requirements for the design,
installation, inspection, testing, and maintenance of fuel-gas piping and
related equipment in covered buildings.
2. Before installing a new natural-gas piping system, what is the most
important first step in determining applicable requirements?
A. Select the pipe color
B. Determine the governing code, adopted amendments, and local
requirements
, C. Install the largest available pipe
D. Determine the appliance manufacturer's warranty period
B. Determine the governing code, adopted amendments, and local
requirements
Fuel-gas installations must comply with the code and amendments
adopted by the applicable authority having jurisdiction, so determining
the governing requirements is fundamental before design or installation
begins.
3. What is the primary purpose of a gas piping sizing calculation?
A. To minimize the number of fittings
B. To ensure adequate gas flow and pressure is delivered to
connected appliances
C. To determine the color of the piping
D. To eliminate the need for regulators
B. To ensure adequate gas flow and pressure is delivered to connected
appliances
Proper sizing ensures that the piping can deliver the required gas
volume at an acceptable pressure drop while all connected appliances
operate correctly.
4. When sizing a gas piping system, which information is generally
essential?
A. Appliance input ratings, developed length, allowable pressure
drop, and gas characteristics
, B. Paint color and wall thickness
C. Building owner's occupation
D. Appliance serial numbers only
A. Appliance input ratings, developed length, allowable pressure drop,
and gas characteristics
Gas-piping sizing depends on the connected appliance demand and the
physical and operating characteristics of the piping system.
5. An appliance has an input rating of 100,000 Btu/h. Approximately
how many cubic feet per hour of natural gas would be required if
natural gas is assumed to contain 1,000 Btu per cubic foot?
A. 10 CFH
B. 50 CFH
C. 100 CFH
D. 1,000 CFH
C. 100 CFH
Dividing 100,000 Btu/h by approximately 1,000 Btu per cubic foot gives
an estimated demand of 100 cubic feet per hour.
6. In a typical gas-piping sizing procedure, the total demand
downstream of a branch point is determined by:
A. Adding the input ratings of appliances supplied by that section
B. Using only the largest appliance
C. Using the smallest appliance
D. Dividing all appliance ratings by pipe diameter
, A. Adding the input ratings of appliances supplied by that section
Each piping section must be capable of supplying the combined demand
of the appliances served downstream of that section.
7. What does "developed length" generally mean when sizing fuel-gas
piping?
A. The straight-line distance between the meter and appliance
B. The measured length of the piping route, accounting for the
actual developed path
C. The outside diameter of the pipe
D. The length of pipe purchased from the supplier
B. The measured length of the piping route, accounting for the actual
developed path
Developed length follows the actual piping route rather than simply
measuring the direct distance between two points.
8. Why does excessive pressure drop in a gas piping system create a
potential operating problem?
A. It increases pipe weight
B. It can prevent appliances from receiving adequate gas pressure
for proper operation
C. It automatically increases gas heating value
D. It eliminates combustion air requirements
B. It can prevent appliances from receiving adequate gas pressure for
proper operation
