The application pressure gauge shows how much air pressure you:

The spring brakes used on the chambers in a straight truck will bring you to a stop when air pressure drops below ______ psi.

Some air brake systems have an alcohol evaporator. What may happen if you don’t keep the proper level of an alcohol?

Your truck or bus has a dual air brake system. If a low air pressure warning comes on for only one system, what should you do?

Why drain water from compressed air tanks?

The safety valve is set automatically when pressure is:

Your truck has a dual air system and one of the system loses its pressure. What will happen?

Parking or emergency brakes of trucks and buses can be legally held on by ______ pressure.

If your truck or bus has dual parking control valves, you can use pressure from a separate tank to:

If your truck has a properly functioning dual air brake system and minimum size air tanks the air pressure should build up from 85 to loo psi within how many seconds?

How should you check that your service brakes are working properly?

A straight truck or bus air brake system should not leak at the rate of more than _______ psi per minute with the engine off and the brakes released.

During normal driving, spring brakes are usually held back by:

The air compressor stops pumping air at what psi?

The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks falls below ______ psi.

Excessive use of the service brakes results in overheating which can lead to:

The most common type of foundation brake found on heavy vehicles is the:

If you must make an emergency stop, you should brake so you:

Your truck or bus has a dual air brake system. If a low air pressure warning comes on for only one system, what should you do?

If your vehicle has an alcohol evaporator, every day during cold weather you should:

The air loss rate for a straight truck or bus with the engine off and the brakes on should not be more than:

The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks falls below ______ psi

The braking power of the spring brakes:

The air brake lag distance at 55 mph on dry pavement adds about ____

Total stopping distance for air brakes is longer than that for hydraulic brakes due to _______ distance.

It is accepted that too much heat caused by using your brakes too often can also cause:

Repeatedly partially releasing and pressing the brake pedal may result in:

The brake system that applies and releases the brakes when the driver uses the brake pedal is the __________ brake system.

A stack adjuster’s free play needs to be adjusted if it is more than about ____ how many inches when you pull hard on it?

An air brake system is fully charged at what psi?

The brake pedal in an air brake system:

The S-cam:

Under normal conditions in order to engage the parking brakes driver:

All air brake equipped vehicles have:

With air brake vehicles, the parking brakes should be used:

A straight truck or bus air brake system should not leak at the rate of more than _______ psi per minute with the engine off and the brakes released.

Which of these s NOT a proper time to apply the parking brakes?

With air brake vehicles, parking brakes should be used:

Why should you drain water from compressed air tanks?

If the spring brakes are on, when should you push the brake pedal?

To check the free play of manual slack adjusters of S-cam brakes, you should park on:

Excessive heat caused by using your brakes too often can also cause:

If you must make an emergency stop, you should brake so you:

The use of brakes on a long and steep downgrade under normal conditions is only a supplement to:

The most important thing to do when a low air pressure warning comes on is:

The parking or emergency brake on a heavy vehicle can only be held in position by something that cannot leak away, like:

Air braking takes more time than hydraulic braking because air:

When brakes are applied the brake shoes will press against the:

The safety valve discharges automatically at the pressure of:

Emergency stab braking is:

If air pressure is not built up within the correct amount of time, then:

The safety valve reduces pressure at ______ psi?

Why should you drain water from compressed air tanks?

When brakes are applied the brake shoes will align to press against the:

Why should you drain water from compressed air tanks?

If you must make an emergency stop, you should brake so you:

The supply pressure gauge shows how much pressure:

The supply pressure gauge shows how much pressure:

The braking power of the spring brakes:

Your brakes are fading when:

If your vehicle has an alcohol evaporator, it is there to:

The air compressor governor controls:

Modern air brake system combine three different systems. They are the service, the parking and the ________ brakes.

If you do not have automatic tank drains, how often should you drain the oil and water from the bottom of compressed air storage tanks?

The proper use of the brakes when going down a long steep grade after selecting a proper gear is to brake until your speed is about ______ mph below the posted speed for your safety and release your brake.

In ideal conditions a truck or bus with an air brake going at 55 mph would require stopping distance of how many feet?

When is it OK to leave your truck unattended without applying the parking brakes and choking the wheels?

The stop light switch:

It is not safe to drive a vehicle that has brake drums with cracks that are longer than ______ of the width of the friction area.

To test air service brakes you should:

If you are driving down to the steep downgrade and you have reached the speed of 40 mph, you would apply the service brake until your speed dropped to below ____ mph.