E. LearndmvDMV PRACTICE
Find your state Exam types Practice tests Sign in Create account ↗
Practice quizzes / California CDL Combination Vehicles Test Practice Questions - California Commercial Driver License Combination Vehicles Test Exam / Question 60823
Practice question

Why relieve pressure before pulling the fifth wheel release handle?

  1. It raises trailer nose
  2. It charges air tanks
  3. It turns off ABS
  4. Binding can prevent safe release

Answer: D — Binding can prevent safe release

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

Practice more: California CDL Combination Vehicles Test Practice Questions - California Commercial Driver License Combination Vehicles 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.