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2021 IPC / UPC fundamentals; IFGC for gas

Plumbing Journeyman
Get ready for what’s next.

Know the system, not just the answer. DWV, venting, supply, and backflow.

200practice questions
120 minpractice mock limit
70%practice benchmark

Practice settings are not official exam specifications. Verify your jurisdiction’s bulletin, code edition, and allowed reference materials.

KNOW THE TERRITORY

What you’ll practice.

DWV sizing15%
Venting15%
Water supply sizing15%
Fixtures10%
Traps10%
Backflow10%
Water heaters10%
Gas piping10%
Isometrics and general5%

Target topic weights for CodeReady mock exams, not an official exam blueprint.

TAKE IT FOR A TEST DRIVE

Three questions. No sign-up.

01 / DWV sizing

Under the 2021 IPC, what is the general minimum slope for a horizontal drainage pipe 2.5 inches or smaller?

  1. 1/4 inch per foot
  2. 1/8 inch per foot
  3. 1/16 inch per foot
  4. 1 inch per foot
Show answer & explanation

1/4 inch per foot

Table 704.1 generally requires 1/4 inch per foot for pipes 2.5 inches or smaller. Verify any special application and local amendment.

2021 IPC Table 704.1

02 / DWV sizing

Under the 2021 IPC, what is the general minimum slope for a horizontal drainage pipe 3 through 6 inches in diameter?

  1. 1/16 inch per foot
  2. 1/8 inch per foot
  3. 1/4 inch per foot in every case
  4. No slope if vented
Show answer & explanation

1/8 inch per foot

The table permits a 1/8-inch-per-foot minimum for 3- through 6-inch horizontal drainage piping. This differs from rules in some other codes.

2021 IPC Table 704.1

03 / DWV sizing

Under the 2021 IPC, what is the general minimum slope for horizontal drainage pipe 8 inches or larger?

  1. 1/16 inch per foot
  2. 1/4 inch per foot in every case
  3. 1/8 inch per foot in every case
  4. Zero slope
Show answer & explanation

1/16 inch per foot

Table 704.1 provides a 1/16-inch-per-foot minimum for piping 8 inches and larger, subject to the actual system design and applicable requirements.

2021 IPC Table 704.1