Tennessee CDL Air Brakes Practice Test 5

Tennessee CDL Air Brakes. This Tennessee CDL Air Brakes Practice Test 5 continues your preparation for the air brakes knowledge exam with stronger real-test review on air pressure recovery, brake lag, warning devices, spring brakes, brake fade, downgrade control, leakage judgment, brake balance, and safe inspection decisions. 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 pressure recovery, low-air warnings, spring brakes, air leaks, governor cut-out behavior, brake fade, controlled braking, ABS, moisture in the system, tank draining, brake chambers, parking on grades, and safe decisions before continuing. 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%

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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 5
Focus: pressure recovery, brake lag, spring brakes, brake fade, leaks, downgrade control, and inspection judgment
Passing target: 20 of 25 • Page 1 of 5

Air pressure recovery

During the air brake test, why is air pressure recovery time important?

AIt proves the parking brake knob is the correct color

BIt shows whether the compressor can rebuild pressure fast enough

CIt prevents the brake lights from turning on

DIt replaces the need for a low air warning test

Low air warning

What is the safest conclusion if the low air warning activates only after pressure is already dangerously low?

AThe warning is better because it waits longer

BThe driver should ignore it if the compressor still runs

CThe parking brake should be used as the normal service brake

DThe warning system is defective and the vehicle should not be driven

Service brake check

When checking the service brakes, what are you mainly looking for as the vehicle moves slowly forward?

AThat the vehicle stops properly and does not pull hard to one side

BThat the horn becomes louder as speed increases

CThat the air tanks drain automatically every time

DThat the spring brakes stay applied while accelerating

Brake lag

At highway speed, why does brake lag make following distance especially important?

ABrake lag makes the vehicle stop before the driver reacts

BBrake lag only happens below parking-lot speed

CThe vehicle keeps moving before the brakes fully apply

DAir brakes remove the need to watch traffic ahead

Spring brake warning

If spring brakes begin to apply while you are driving because air pressure is dropping, what does that indicate?

AThe brake system is working better than normal

BAir pressure is dangerously low and this is an emergency

CThe compressor has fully charged both tanks

DThe service brakes should be pumped faster to continue driving

You must answer every question on this page before continuing.

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