Air Brake Quiz 2

The air pressure in a dual air brake system should build from 85 to 100 psi within:

• Two minutes.

• 15 seconds.

• 10 minutes.

• 45 seconds.

Failing to drain the tanks in an air brake system can result in:

• Water freezing and causing brake failure.

• Squishy brakes.

• Too much air collecting.

• Too much fuel being carried.

If the brake pads rub against the brake drums and create too much heat:

• The brakes will stick.

• The brakes will become extra sensitive.

• The brakes may stop working.

• The air compressor will kick on to cool the brakes.

Vehicles with dual air brake systems:

• Full-capacity air pressure in the braking systems even when the vehicle is not running.

• Maintain some air pressure in the braking systems when the vehicle is not running.

• Must be run to build enough air pressure to brakes to operate properly.

• Do not need time to build air pressure before a trip.

A vehicle equipped with an Anti-Lock Braking System (ABS) uses a ____ light to warn that the system is not working properly.

• Green

• Yellow

• Orange

• White

During a static leakage test, the maximum leakage rate for a triple combination vehicle with air brakes is ____ in a minute.

• 3 psi

• 5 psi

• 7 psi

• 9 psi

The brake pedal is part of which braking system?

• The service brake system

• The parking brake system

• The emergency brake system

• The auxiliary brake system

Most heavy-duty vehicles use ____ air brake systems.

• Single

• Dual

• Triple

• Quad

If using air tanks with manually operated drains, how often should you drain the tanks?

• Every day

• Once a week

• Once a month

• Once every 3,000 miles

Where is the safety relief valve usually located?

• Near the rear brake

• Near the front brake

• In an air tank

• On the dashboard