E. LearndmvDMV PRACTICE
Find your state Exam types Practice tests Sign in Create account ↗
Practice quizzes / Pennsylvania CDL Air Brakes Practice Questions - Pennsylvania CDL Air Brakes Knowledge Test Exam / Question 166161
Practice question

Under PennDOT CDL Manual Section 5, what is the shape and color of the parking brake control knob in most modern CMVs?

  1. A red 8-sided (octagonal) knob
  2. A yellow diamond-shaped knob
  3. A green round knob
  4. A blue square knob

Answer: B — A yellow diamond-shaped knob

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: Pennsylvania CDL Air Brakes Practice Questions - Pennsylvania CDL Air Brakes Knowledge Test Exam →
Learndmv.

Thoughtful practice for the road ahead. Find permit, road signs and CDL preparation by state.

Explore

Practice by stateAll practice testsExam types

Your account

My profilePractice historyAccount security

Get started

Create accountSign inSitemap
© 2026 LearndmvIndependent practice resource · Not affiliated with any state DMV.