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Combination Test 4
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Tennessee CDL Combination Vehicles Practice Test 4

Tennessee CDL Combination Test - Combination Vehicles. The combination vehicles test is required for Class A CDL applicants in Tennessee who plan to operate combination vehicles. This Tennessee CDL Combination Vehicles Practice Test 4 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 Tennessee CDL Manual and covers the core information needed to safely operate combination vehicles. Tennessee's Combination Vehicles section focuses on driving combinations, combination vehicle air brakes, antilock brake systems, coupling and uncoupling, and inspecting combinations. Take this Tennessee 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, Tennessee 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 4
  • Focus: driving combinations, coupling, inspection, and air systems
  • Passing target: 16 of 20 • Page 1 of 4
1
Combination Vehicle Air Brakes

What does the tractor protection valve do if the trailer breaks away or develops a major air leak?

Question 1
2
Trailer Air Lines

Which air line is usually identified by the color red on a combination vehicle?

Question 2
3
Trailer Air Lines

What is the main job of the service line on a combination vehicle?

Question 3
4
Glad Hands and Couplers

Why should glad hands and their rubber seals be cleaned before connecting them?

Question 4
5
Crossed Air Lines

If the service and emergency air lines are crossed, what may happen on many trailers with spring brakes?

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