ICC F27 Master 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 (3:00 here), and each topic lands in one of these:
What's on the exam
Questions per topic, out of 80Topics
Administration
Key Concepts
Scope — IPC vs. IFGC - The IPC applies to the erection, installation, alteration, repairs, relocation, replacement, addition to, use or maintenance of plumbing systems, and regulates non-flammable medical gas, inhalation anesthetic, vacuum piping, nonmedical oxygen systems, and sanitary and condensate vacuum collection systems. Fuel gas distribution piping and equipment, fuel-gas-fired water heaters and water heater venting systems are regulated by the IFGC (IPC 101.2). - Appendices do not apply unless specifically adopted. 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 IRC (IPC 101.2). - IFGC piping system provisions cover natural gas at an operating pressure of 125 psig or less and LP-gas at **20 psig…
General Regulations
Key Concepts
Definitions (IPC 2015, Section 202) - Branch interval — a vertical distance of 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. - Building drain — extends 30 inches (762 mm) in developed length beyond the exterior walls; past that point it is the building sewer. - Circuit vent — vents two traps to a maximum of eight traps or trapped fixtures connected into a battery. - Tempered water — 85°F (29°C) to 110°F (43°C). Hot water is greater than or equal to 110°F (43°C). - Backpressure, low head — less than or equal to 4.33 psi (29.88 kPa), the pressure of a 10-foot (3048…
Fixtures
Key Concepts
Scope and prohibitions - Chapter 4 governs materials, design and installation of plumbing fixtures, faucets and fixture fittings by occupancy type, and sets minimum fixture counts (401.1). - Prohibited: water closets with a concealed trap seal, an unventilated space, or walls not thoroughly washed at each discharge per ASME A112.19.2/CSA B45.1; any water closet permitting siphonage of bowl contents back into the tank; trough urinals (401.2). - Maximum flow rates and flush volumes comply with Section 604.4 (401.3).
Fixture materials - Fixtures: approved materials, smooth, impervious, free of defects and concealed fouling surfaces; porcelain enameled surfaces must be acid resistant (402.1). - Specialty fixtures not otherwise covered: stainless steel, soapstone, chemical stoneware or plastic, or lined with lead, copper-base alloy, nickel-copper alloy, corrosion-resistant steel…
Water Heaters
Key Concepts
Scope and general provisions (Section 501) - Chapter 5 governs the materials, design and installation of water heaters and related safety devices and appurtenances (501.1). - Water heater as space heater: where a combination potable water heating and space heating system requires water for space heating at temperatures greater than 140°F (60°C), a master thermostatic mixing valve complying with ASSE 1017 shall limit water supplied to the potable hot water distribution system to 140°F (60°C) or less; potability must be maintained throughout the system (501.2). - Drain valves: required for emptying at the bottom of each tank-type water heater and hot water storage tank. Inlet not less than 3/4-inch nominal iron pipe size; outlet provided with male garden hose threads (501.3). - Location: water…
Water Supply & Distributions
Key Concepts
Water service sizing and separation - Water service pipe shall be sized for required quantities and pressures, and shall be not less than 3/4 inch (19.1 mm) in diameter (Section 603.1). - Where water service is in the same trench with the building sewer, the sewer shall be of materials listed in Table 702.2. If it is not, the water service and building sewer shall be horizontally separated by not less than 5 feet (1524 mm) of undisturbed or compacted earth (Section 603.2). - The separation does not apply where the water service crosses a sewer, provided the water service is sleeved to a point not less than 5 feet (1524 mm) horizontally from the sewer pipe centerline on both sides of the crossing;…
Sanitary Drainage
Key Concepts
Drainage piping installation - Horizontal drainage piping must be installed in uniform alignment at uniform slopes, not less than the slope indicated in Table 704.1 (IPC 2015, Section 704.1). - Drainage piping shall not be reduced in size in the direction of flow; a 4-inch by 3-inch water closet connection is not considered a reduction (Section 704.2). - Horizontal branches shall connect to the bases of stacks at a point not less than 10 times the diameter of the drainage stack downstream from the stack (Section 704.3). - A horizontal offset in a soil or waste stack below the lowest horizontal branch: the offset and the stack below it are sized as a building drain per Table 710.1(1) (Section 711.3). - Double sanitary tee…
Vents
Key Concepts
Trap seal protection & special waste - The vent system must permit admission/emission of air so 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 is independent of the sanitary vent system and terminates separately through the roof or to an AAV complying with ASSE 1049, constructed of materials approved under §702.5 and tested for chemical resistance per ASTM F 1412 — §901.3. The same ASSE 1049 / ASTM F 1412 condition is the only exception allowing AAVs in nonneutralized special waste systems — §918.8.
Traps, Interceptors, & Separators
2015 International Plumbing Code — Chapter 10, Traps, Interceptors and Separators
Key Concepts
Fixture traps (IPC 2015, 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, and 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 to 1002.1: 1. Does not apply to fixtures with integral traps. 2. A combination plumbing fixture may be installed on one trap, provided one compartment is not more than 6 inches deeper than the other and the waste outlets are not more than 30 inches…
Storm Drainage
2015 International Plumbing Code — Chapter 11, Storm Drainage
Key Concepts
General requirements (Section 1101) - Storm water shall not be drained into sewers intended for sewage only (1101.3). - The size of a drainage pipe shall not be reduced in the direction of flow (1101.5). - Roofs shall be designed for the maximum possible depth of water that will pond thereon, determined by the relative levels of roof deck and overflow weirs, scuppers, edges or serviceable drains in combination with the deflected structural elements. All primary roof drainage means shall be assumed to be blocked when determining that depth (1101.7). - Cleanouts shall be installed in the storm drainage system and shall comply with this code's provisions for sanitary drainage pipe cleanouts. **Exception: subsurface drainage…
Plan Reading
Key Concepts
Drainage piping layout - Horizontal branches shall connect to the bases of stacks at a point located not less than 10 times the diameter of the drainage stack downstream from the stack; the same rule applies downstream of the upper stack at a horizontal stack offset (IPC 2015, §704.3). - Drainage piping shall not be reduced in size in the direction of flow, but a 4-inch by 3-inch water closet connection shall not be considered a reduction in size (§704.2). - Double sanitary tee patterns shall not receive the discharge of back-to-back water closets, except where the horizontal developed length between the water closet outlet and the connection to the pattern is 18 inches or greater (§706.3). - Stack offsets: vent horizontal offsets where…
Gas
Key Concepts
Appliance location and installation (Ch. 3) - Private garages: appliances installed with a minimum clearance of 6 feet above the floor; exception where protected from motor vehicle impact and installed per Section 305.3 (Sec. 305.5). - Public garages, motor fuel-dispensing facilities, repair garages: not less than 8 feet above the floor; where vehicles can pass under, install at manufacturer's clearances and not less than 1 foot higher than the tallest vehicle garage door opening (Sec. 305.4). - Ignition source not less than 18 inches above the floor in hazardous locations and public, private, repair and parking garages and motor fuel-dispensing facilities; exception only for appliances listed as flammable vapor ignition resistant (Sec. 305.3). - At grade: level concrete slab or approved material extending **not…