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Alabama CDL Combination Vehicles Practice Test 1

Alabama CDL Combination Test - Combination Vehicles. The combination vehicles test is required for Class A CDL applicants in Alabama who plan to operate combination vehicles. This Alabama CDL Combination Vehicles Practice Test 1 consists of 20 questions, and you must answer at least 16 correctly to pass with a score of 80%. The test is based on Section 6 of the Alabama CDL Manual and covers the core information needed to safely operate combination vehicles. Alabama's Combination Vehicles section focuses on driving combinations, combination vehicle air brakes, antilock brake systems, coupling and uncoupling, and inspecting combinations. Take this Alabama CDL practice test now to prepare for the actual combination vehicles knowledge exam. To earn your CDL, you must pass the required knowledge tests and the skills test. Depending on your license class and endorsements, Alabama may also require tests for General Knowledge, Air Brakes, Passenger, School Bus, Tank Vehicles, Hazardous Materials, and Doubles/Triples. Special endorsements are required for certain vehicle types, and Class A applicants should be prepared for the additional knowledge needed to safely operate tractor-trailers and other combination vehicles.

Questions on this page
5
Exam questions
20
Correct to pass
16
Passing score
80%
Page
1 / 4

Page 1 — 5 practice questions

CDL Combination Vehicles

Instructions

  • Select the best answer for each question.
  • Read every option carefully before choosing.
  • Complete all 5 questions on this page before moving on. Your answers stay saved when you refresh or move between pages.

Quick snapshot

  • Topic: CDL Combination Vehicles Practice Test 1
  • Focus: driving combinations, coupling, inspection, and air systems
  • Passing target: 16 of 20 • Page 1 of 4
1
Rollover Risk

What two driving practices does the Alabama CDL manual emphasize for reducing combination-vehicle rollover risk?

Question 1
2
Rearward Amplification

What is the combination-vehicle 'crack-the-whip' effect?

Question 2
3
Trailer Hand Valve

What is the proper normal use of the trailer hand valve?

Question 3
4
Tractor Protection Valve

What is the main purpose of the tractor protection valve?

Question 4
5
Trailer Air Supply

On a newer combination vehicle, what does pulling out the red trailer air-supply knob do?

Question 5
You must answer every question on this page before continuing.
Page 1 of 4