Tennessee CDL Air Brakes Practice Test 3

Tennessee CDL Air Brakes. This Tennessee CDL Air Brakes Practice Test 3 continues your preparation for the air brakes knowledge exam with a stronger scenario-based review. It consists of 25 questions, with 5 questions per page, and you must answer at least 20 correctly to pass with a score of 80%. This test focuses on inspection sequence, low-air warnings, governor cut-in behavior, brake lag, controlled braking, stab braking, ABS, brake fade, downgrades, air leaks, spring brakes, and safe air brake judgment. Take this Tennessee CDL practice test now to prepare for the actual air brakes knowledge exam. Depending on your license class and endorsements, Tennessee may also require tests for General Knowledge, Combination Vehicles, Passenger, School Bus, Tank Vehicles, Hazardous Materials, and Doubles/Triples.

Questions on this page

Exam questions

Correct to pass

Passing score

80%

Page

1 / 5

Page 1 — 5 practice questions

CDL Air Brakes

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 Air Brakes Practice Test 3
Focus: inspections, brake lag, controlled braking, leaks, and downgrades
Passing target: 20 of 25 • Page 1 of 5

Air brake inspection sequence

During an air brake inspection, what is the main reason to build air pressure before testing warning devices and spring brakes?

ATo empty the tanks before every test

BTo start from normal pressure and observe how the system responds as pressure drops

CTo avoid testing the spring brakes

DTo make the brake lights brighter

Low air warning response

You are driving and the low air pressure warning comes on. What is the safest response?

AStop safely as soon as possible and have the problem corrected

BIgnore it if the vehicle still moves

CSpeed up so the compressor works harder

DPump the brake pedal until the light goes out

Governor cut-in

If air pressure falls to the governor cut-in level, what should happen?

AThe parking brake should release automatically

BThe safety valve should open

CThe compressor should begin pumping air again

DThe air tanks should drain themselves

Brake lag in traffic

Why is following distance especially important in a vehicle with air brakes?

ABecause air brakes eliminate reaction distance

BBecause spring brakes are always applied while driving

CBecause low gears stop the truck immediately

DBecause brake lag and vehicle weight require more stopping room

Air tank moisture

What problem can moisture in the air tanks cause in cold weather?

AIt improves radio reception

BIt can freeze and interfere with air brake operation

CIt increases the legal speed limit

DIt makes the vehicle lighter

You must answer every question on this page before continuing.

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