ICC F28 Journeyman Plumber with Gas Exam (2015 IPC/IFGC)
Practice at the real exam's pace
Every practice exam shows your time per question against the real exam's clock (2:34 here), and each topic lands in one of these:
What's on the exam
Questions per topic, out of 70Topics
Plumbing Fixtures and Terminology
Key Concepts
Definitions (IPC 2015, Section 202) — the largest single source of test items on this topic:
- Branch interval: a vertical measurement of distance, 8 feet (2438 mm) or more in developed length, between connections of horizontal branches to a drainage stack; measured down the stack from the highest horizontal branch connection.
- Tempered water: water having a temperature range between 85°F (29°C) and 110°F (43°C). Hot water is water at a temperature greater than or equal to 110°F (43°C).
- Circuit vent: a vent connecting to a horizontal drainage branch that vents two traps to a maximum of eight traps or trapped fixtures connected into a battery.
- Building drain: the lowest piping of a drainage system receiving discharge from soil, waste and other drainage pipes inside, extending 30 inches (762 mm) in developed length beyond the exterior walls. The building sewer begins at the end of the building drain. -…
Plumbing Fundamentals
Key Concepts
Scope and applicability - The IPC governs erection, installation, alteration, repair, relocation, replacement, addition, use and maintenance of plumbing systems (Section 101.2). Exception: detached one- and two-family dwellings and townhouses not more than three stories high with separate means of egress, and their accessory structures, comply with the International Residential Code (101.2). - Where a general and a specific requirement conflict, the specific governs; where different sections specify different requirements, the most restrictive governs (102.1). Code provisions take precedence over referenced standards (102.8.1, 102.8.2). Where this code and manufacturer's instructions conflict, the more restrictive applies (301.7).
Permits and documents - Annual permit, in lieu of individual permits for each alteration to an already approved installation, may be issued to a person/firm regularly employing one or more qualified tradespersons on the premises (106.1.1). - Construction documents for buildings more than two stories in height must indicate penetration locations and the materials and methods…
Traps, Cleanouts, and Interceptors
ICC F28 Journeyman Plumber with Gas (2015 IPC/IFGC) — 3 questions, 4% of exam
Key Concepts
Fixture traps and trap distances (IPC 2015, Section 1002.1) - Each plumbing fixture shall be separately trapped by a liquid-seal trap, except as otherwise permitted. - The vertical distance from the fixture outlet to the trap weir shall not exceed 24 inches (a maximum). - The horizontal distance shall not exceed 30 inches, measured from the centerline of the fixture outlet to the centerline of the trap inlet. - A fixture shall not be double trapped. Exceptions: fixtures with integral traps; a combination plumbing fixture on one trap where one compartment is not more than 6 inches deeper than the other and the waste outlets are not more than 30 inches apart; a grease interceptor serving as a fixture trap for a single fixture or combination sink of not more than three compartments where the vertical distance from…
Special Requirements
Key Concepts
Indirect wastes — where required (IPC 2015, Section 802.1) - Food-handling equipment (other than dwelling units), clear-water waste, dishwashing machines and utensils, pots, pans and dishwashing sinks must discharge through an indirect waste pipe. Health-care related fixtures, devices and equipment discharge to the drainage system through an indirect waste pipe by means of an air gap (Sections 802.1 and 713.3). - 802.1.1 Food handling: equipment and fixtures used for storage, preparation and handling of food discharge through an indirect waste pipe by means of an air gap, and each well of a multiple-compartment sink shall discharge independently to a waste receptor. - 802.1.3 Potable clear-water waste: sterilizers, relief valves and similar devices discharging potable water to the building drainage system require an air gap. - 802.1.5 Nonpotable clear-water waste: process tanks, filters, drips and boilers may discharge through an air break or an air gap. - 802.1.2: floor drains in walk-in refrigerators/freezers…
Drainage Requirements
ICC F28 Journeyman Plumber with Gas (2015 IPC/IFGC) — 10 questions, 14% of exam
Key Concepts
Materials and temperature - Where waste water temperature will be greater than 140°F (60°C), sanitary drainage piping material shall be rated for the highest temperature of the waste water (702.5). - Where a building sewer or building drain is installed on filled or unstable ground, the pipe shall conform to a standard for ABS plastic, cast iron, copper or copper-alloy tubing, or PVC plastic listed in Table 702.3 (703.2). Vitrified clay is listed in Table 702.3 generally but is not among these four. - Building storm sewer pipe materials are those in Table 1102.4: ABS, cast iron, concrete, copper/copper-alloy tubing (Type K, L, M or DWV), PE, PVC, vitrified clay, and Type 316L stainless steel. Galvanized steel is not listed. - Subsoil drains shall be open-jointed, horizontally split or perforated pipe per Table 1102.5 and **not less…
Venting Requirements
ICC F28 Journeyman Plumber with Gas (2015 IPC/IFGC) — 10 questions, 14% of exam
Key Concepts
General (Section 901) - The vent system must permit admission or emission of air so that no fixture trap seal is subjected to a pressure differential of more than 1 inch of water column (249 Pa) — §901.2. - A chemical waste vent system must be independent of the sanitary vent system and terminate separately through the roof or to an air admittance valve complying with ASSE 1049, constructed of materials approved per §702.5 and tested for chemical resistance per ASTM F 1412 — §901.3 (repeated at §918.8).
Vent terminals (Section 903) - Where a roof is used for assembly, promenade, observation deck, sunbathing deck or similar, open vent pipes terminate not less than 7 feet above the roof — §903.1. - Frost closure: where the 97.5-percent outside design temperature is 0°F (-18°C) or less, vent extensions through…
Water Distribution
Key Concepts
Water service (603). The water service pipe is sized for the required quantities and pressures but shall be not less than 3/4 inch (19.1 mm) in diameter (603.1). Where water service shares a trench with a building sewer not constructed of materials listed in Table 702.2, the two shall be separated horizontally by not less than 5 feet (1524 mm) of undisturbed or compacted earth (603.2). At a crossing, that separation does not apply if the water service is sleeved to a point not less than 5 feet horizontally from the sewer pipe centerline on both sides, using materials from Table 605.3, 702.2 or 702.3; it also does not apply where the bottom of the water service within 5 feet of the sewer is not less than 12 inches (305 mm) above the highest point of the top of the building sewer (603.2). Potable water service pipes shall not be located in,…
Plan Reading
Key Concepts
Water supply and distribution (Chapter 6) - The water service pipe is sized for required quantities and pressures, but shall be not less than 3/4 inch (19.1 mm) in diameter (603.1). - Water service in the same trench as a building sewer: if the sewer is not of materials listed in Table 702.2, the two must be horizontally separated by not less than 5 feet (1524 mm) of undisturbed or compacted earth. Alternatives: the water service is sleeved to a point not less than 5 feet horizontally from the sewer centerline on both sides of a crossing, or the bottom of the water service within 5 feet of the sewer is not less than 12 inches (305 mm) above the highest point of the top of the building sewer (603.2). - A fixture supply pipe shall terminate not more than 30 inches (762 mm) from the point of connection to the fixture…
Gas
Key Concepts
Pipe sizing methods. Under the longest length method (Section 402.4.1), the pipe size of each section is determined using the longest length of piping from the point of delivery to the most remote outlet and the load of that section. Under the branch length method (Section 402.4.2), each section of the longest run is sized by that longest run, and each branch not previously sized is sized using the length from the point of delivery to the most remote outlet in that branch. Maximum gas demand is the sum of the maximum input of the appliances served (Section 402.2).
Maximum design operating pressure. Piping inside buildings shall not exceed 5 psig except where the system is welded, in a ventilated chase, temporary for buildings under construction, agricultural, an LP-gas system over 20 psi complying with NFPA 58, or located in areas used exclusively for industrial processing or heating, research, warehousing, or boiler/mechanical…