Free Washington (WA) CDL Air Brakes practice test 2026

The section applicants fail most often. Pressure figures differ by state manual.

What’s different in Washington

Most Air Brakes questions are the same federal material in every state. One question in the app is written for Washington alone, from the Washington Commercial Driver Guide (Washington State Department of Licensing).

Low air warning on the written air brakes test: Before pressure drops below 60 psi. The national model manual says 55 psi.Washington manual, section 5.1.4
Low air warning in the pre-trip inspection (skills test): Before pressure drops below 55 psi.Washington's CDL manual and licensing pages
Skills test version: The modernized skills test.Washington's CDL manual and licensing pages

A Washington question, answer shown

Washington's Commercial Driver Guide gives what threshold for the low air pressure warning signal?

75 psi
55 psi
60 psi(correct answer)
50 psi

The manual used in Washington sets the visible low air pressure warning at 60 psi, higher than the 55 psi in the AAMVA model manual. Older vehicles may use one half the governor cut-out pressure instead.

Handbook section 5.1.4

Practice every Washington Air Brakes question

A sample question

One example, answer shown. Practicing the rest happens in the app.

At approximately what pressure does the air compressor governor stop pumping air into the tanks?

125 psi(correct answer)
150 psi
100 psi
60 psi

The governor 'cut-out' pressure is about 125 psi. When tank pressure falls to roughly 100 psi, the governor cuts back in and the compressor resumes pumping.

Handbook section 5.1.2

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