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WorksheetsAir Brakes Quiz 1
Total questions: 25
Worksheet time: 13mins
What kind of force must emergency brakes use?
Electrical
Mechanical
Air pressure
Heavy
Which of the following is not a part of an air brake system?
A service brake system
A parking brake system
An axle brake system
An emergency brake system
If the low pressure warning light comes on while you are driving:
Braking will only occur if there is enough air in the tanks.
You should continue driving, but turn the emergency flashers on to warn other motorists.
You should continue to drive normally and check the brake system when it is convenient.
You can brake 14 times before the air in the system runs out.
When you need to stop in an emergency, you should:
Stop in a way that keeps your vehicle in a straight line.
Lock the wheels and skid to a stop.
Expect your vehicle to slow down more quickly than usual.
Stop in a way that turns your vehicle.
Emergency brakes:
Are not required on trucks.
Are only required on trailers.
Are optional.
Are required on tractors.
Truck tractors with air brakes built on or after March 1, 1997 must have:
A rear back-up camera.
GPS.
An Anti-Lock Braking System (ABS).
Bluetooth.
Most heavy-duty vehicles use:
Quadruple air brake systems.
Triple air brake systems.
Dual air brake systems.
Single air brake systems.
If the spring brakes are on, you should:
Be especially careful because the brakes may fail.
Move the steering wheel.
Press the accelerator.
Not use the brake pedal.
If your tractor is equipped with ABS but your trailer is not, the ABS:
Will not be effective.
Will allow others to see when you brake.
Will still improve your steering control.
Will make jackknifing easier.
The ____ tells a driver how much pressure is in the air tanks.
Application pressure gauge
Air compressor governor
Drum brake
During a walk-around inspection, ensure there are no cracks on the brake drums that are more than ____ of the width of the friction area.
One tenth
One half
One third
One quarter
Which type of brakes do most heavy-duty vehicles have?
Air brakes
Gravity brakes
Solid brakes
Liquid brakes
To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve should:
Set the control to normal.
Set the control to the off position.
Set the control to neutral.
Keep the control at the halfway mark.
To stop in a vehicle that uses air brakes, the driver should:
Engage the brake lever.
Pull the air brake lever.
Push the brake pedal down.
Pull the brake pedal up.
Pressing and releasing a brake pedal unnecessarily can:
Create a loud noise.
Release air faster than it can be replaced.
Make the brake pedal more sensitive.
Add more air to the braking system.
During a static leakage test, the maximum leakage rate for a single vehicle with air brakes is ____ in one minute.
5 psi
65 psi
20 psi
During an applied leakage test, the maximum leakage rate for a single vehicle with air brakes is:
4 psi in one minute.
8 psi in one minute.
3 psi in one minute.
6 psi in one minute.
Truck tractors with air brakes that were built on or after March 1, 1997 are equipped with:
Voice-activated brakes.
Anti-Lock Braking Systems (ABS).
Cruise control.
An extra set of brakes.
If using air tanks with manually operated drains, how often should you drain the tanks?
Every day
Once every 3,000 miles
Once a month
Once a week
A low air pressure warning signal should activate:
When tank pressure falls below 10 psi.
When tank pressure falls below 120 psi.
When tank pressure falls below 55 psi.
When tank pressure falls below 5 psi.
What do anti-lock brakes do?
Lock up the front wheels
Help a driver avoid wheel lockup
Prevent a vehicle from accelerating while traveling downhill
Prevent a vehicle from accelerating while traveling uphill
The most common type of foundation brake used is the:
P-cam disc brake
S-cam drum brake
C-cam drum brake
G-cam disc brake
What happens if the air pressure in a system’s air tanks falls below 60 psi?
The vehicle should stop
The front lights will flash
A warning light will come on
The vehicle will not shift out of gear
Most heavy-duty vehicles use ____ air brake systems.
triple
quad
single
Spring brakes come on:
When the tires have minimal tread depth
When the brakes are noisy
When a control on the dashboard is activated
When too much air pressure is lost
