Airbrake test CDL UPDATED ACTUAL
Exam Questions and CORRECT Answers
Which of the following about antilock braking systems is true - CORRECT ANSWER -
ABS changes the way you break in emergencies
In airbrake vehicles, the parking brake should be used - CORRECT ANSWER - Anytime
of the vehicle is parked
If your antilock braking system is not working, you should - CORRECT ANSWER -
Drive normally, but get the system serviced soon
Excessive use of the service brake results in overheating, which can be to - CORRECT
ANSWER - Expansion of the brake drums
Your truck or bus as a dual air brake system. If a low pressure warning comes on for only one
system - CORRECT ANSWER - Stop and safely parked. continue only after the system is
fixed
The air compressor should not stop pumping prior to reaching a___psi - CORRECT
ANSWER - 130
The use of air brakes on a downhill grade is only a supplement to the - CORRECT
ANSWER - Braking effect of the engine
Your truck has properly functioning indoor air brake system and minimum size air tax. The air
pressure should build from 85 to 100 psi within___Seconds - CORRECT ANSWER - 45
If your truck or bus as dualparking control valves, you can use pressure from a separate tank to -
CORRECT ANSWER - Release the spring emergency parking brakes to move a short
distance
, The proper method of breaking when going down long and/or steep grades after selecting the
proper gear is to break until your speed is about___Miles per hour below your safe speed, and
then release your brakes - CORRECT ANSWER -5
It is not safe to drive a vehicle that has brake drums with cracks or that are thinner than the
manufactured specification, generally this will be ___Inches - CORRECT ANSWER - 1/4
A supply pressure gauges tells you how much pressure is in the - CORRECT ANSWER -
Air tanks
Air braking takes more time and then hydraulic breaking because air - CORRECT
ANSWER - Takes more time to flow through the lines and hydraulic fluid
During normal driving, spring breaks are usually held back by - CORRECT ANSWER -
Air pressure
Some air brake systems have an alcohol evaporator. What may happen if you don't keep the unit
filled with alcohol? - CORRECT ANSWER - Ice may form in the Air storage tanks and
causing the brakes to fail
The brake system that applies and releases The brakes when the driver uses the brake pedal is
the___brake system - CORRECT ANSWER - Service
Airbrake vehicles, the parking brakes should be used - CORRECT ANSWER - Anytime
the vehicle is in park
Excessive heat in the brakes can cause the - CORRECT ANSWER - Brakes to fade or fail
To test air service brakes, you should - CORRECT ANSWER - Brake firmly when slowly
moving forward.
Exam Questions and CORRECT Answers
Which of the following about antilock braking systems is true - CORRECT ANSWER -
ABS changes the way you break in emergencies
In airbrake vehicles, the parking brake should be used - CORRECT ANSWER - Anytime
of the vehicle is parked
If your antilock braking system is not working, you should - CORRECT ANSWER -
Drive normally, but get the system serviced soon
Excessive use of the service brake results in overheating, which can be to - CORRECT
ANSWER - Expansion of the brake drums
Your truck or bus as a dual air brake system. If a low pressure warning comes on for only one
system - CORRECT ANSWER - Stop and safely parked. continue only after the system is
fixed
The air compressor should not stop pumping prior to reaching a___psi - CORRECT
ANSWER - 130
The use of air brakes on a downhill grade is only a supplement to the - CORRECT
ANSWER - Braking effect of the engine
Your truck has properly functioning indoor air brake system and minimum size air tax. The air
pressure should build from 85 to 100 psi within___Seconds - CORRECT ANSWER - 45
If your truck or bus as dualparking control valves, you can use pressure from a separate tank to -
CORRECT ANSWER - Release the spring emergency parking brakes to move a short
distance
, The proper method of breaking when going down long and/or steep grades after selecting the
proper gear is to break until your speed is about___Miles per hour below your safe speed, and
then release your brakes - CORRECT ANSWER -5
It is not safe to drive a vehicle that has brake drums with cracks or that are thinner than the
manufactured specification, generally this will be ___Inches - CORRECT ANSWER - 1/4
A supply pressure gauges tells you how much pressure is in the - CORRECT ANSWER -
Air tanks
Air braking takes more time and then hydraulic breaking because air - CORRECT
ANSWER - Takes more time to flow through the lines and hydraulic fluid
During normal driving, spring breaks are usually held back by - CORRECT ANSWER -
Air pressure
Some air brake systems have an alcohol evaporator. What may happen if you don't keep the unit
filled with alcohol? - CORRECT ANSWER - Ice may form in the Air storage tanks and
causing the brakes to fail
The brake system that applies and releases The brakes when the driver uses the brake pedal is
the___brake system - CORRECT ANSWER - Service
Airbrake vehicles, the parking brakes should be used - CORRECT ANSWER - Anytime
the vehicle is in park
Excessive heat in the brakes can cause the - CORRECT ANSWER - Brakes to fade or fail
To test air service brakes, you should - CORRECT ANSWER - Brake firmly when slowly
moving forward.
