Practice Test Geeks(CCI) Certified Construction Inspector Practice Test
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Plumbing & Mechanical Systems Flashcards

7 cards from real CCI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Plumbing & Mechanical Systems flashcards as text

  1. Under the IMC, what is the minimum clearance required between a gas-fired furnace and combustible construction?

    Answer: 0 inches if listed for zero clearance

    Appliances listed and labeled for zero clearance can be installed directly against combustible materials if installed per their listing and manufacturer instructions.

  2. Which venting method uses a single pipe that serves as both the supply air and the vent for a high-efficiency furnace?

    Answer: Direct vent (two-pipe) system

    A direct vent system uses two pipes: one to draw combustion air from outside and one to exhaust flue gases, making it a sealed combustion system.

  3. An inspector observes that a mechanical room housing a boiler has no means of combustion air. The correct remedy is to:

    Answer: Install a make-up air louver or duct sized per code

    Combustion air must be provided to fuel-burning equipment rooms via louvers, ducts, or openings sized according to the fuel input BTU rating per the IMC.

  4. What material is NOT permitted for use as a gas supply piping in residential construction per the IFGC?

    Answer: PVC plastic pipe

    PVC plastic pipe is not approved for gas supply piping; approved materials include steel, copper, CSST, and PE pipe in limited applications.

  5. What is the required minimum distance between a gas appliance vent termination and a window or door opening per the IFGC?

    Answer: 3 feet

    The IFGC requires vent terminations to be at least 3 feet from any openable window, door, or gravity air inlet to prevent re-entry of combustion gases.

  6. A drain, waste, and vent (DWV) system air test is performed by pressurizing the system to:

    Answer: 5 psi for 15 minutes

    Per the IPC, an air test for DWV systems requires pressurization to 5 psi with air or nitrogen, maintained for at least 15 minutes without pressure loss.

  7. Which type of pipe fitting is required when changing direction in a drainage system from vertical to horizontal?

    Answer: Long-sweep 1/4 bend

    Long-sweep fittings (long-turn 1/4 bends) are required at vertical-to-horizontal transitions in drainage systems to maintain flow velocity and prevent solids buildup.