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

The brake pedal in an air brake system:

The brake system that applies and releases the brakes when the driver uses the brake pedal is what system?

All air braked equipped vehicles must have what?

If your truck or bus has a dual parking control valve, you can use pressure fron another tank to:

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

Parking or emergency brakes of trucks and buses can be legally held on by what?

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

Some air brake systems have an alcohol evaporator. What might happen if you don't keep the unit filled with alcohol?

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

the driver must be able to see low air pressure warning that must come on before pressure in the tanks fall below what?

Under normal conditions, in order to engage the parking brake the driver must first:

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

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

For air brake systems in good condition, the air compressor should start pumping at what psi?

A straight truck or bus system should not leak at a rate of more than _ psi per minute with the engine off and the brakes released?

A slack adjustor probably needs adjustment if it moves more than _ inch when you pull on it.

If you are driving down a steep downgrade and you have reached your safe speed of 40 mph, you should apply the service brakes until your speed reaches what?

The use of brakes on a long and/or steep downgrade is only a supplement to:

Under ideal conditions, a truck with air brakes going 55 mph would require a stopping distance of what?

Emergency stab braking is when you:

The braking power of the spring brakes:

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

The proper method of braking when going down hills is: to reduce your speed by mph below your safe speed before releasing the brakes?

Which of the following about ABS is true?

If your ABS is not working, you should:

The stop light switch:

If air pressure does not build up to normal within the correct amount of time:

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

If your truck's compressor has its own oil supply, when should you first check the oil level?

The safety valve is set automatically to reduce pressure in the tanks at what psi?

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

Air brakes take more time to stop than hydraulic brakes because:

In air braked vehicles, the parking brake should be used:

Which of these is not the proper time to apply the parking brakes?

Emergency controlled braking is when you:

The application pressure gauge shows you how much pressure:

The supply pressure gauge shows how much pressure:

How often should you drain the water and oil from your air tanks?

The spring brakes on trucks will bring it to a stop automatically when air pressurt falls to what range?

The air compressor should stop pumping at what psi?

Modern air brakes combine 3 different systems. The service, parking, and brakes.

The s-cam:

If your truck has a dual air system, and 1 system is low on air pressure:

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

If your truck has a properly functioning dual air system, the pressure should build from 85 psi to 100 psi in how long?

You should know that your brakes are fading when:

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

Total stopping distance for air brakes is longer than hydraulics because of what?

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

If a truck or bus has ABS, it will have a _ malfunction lamp on the instrument panel.

The modulating control valve allow you to operate the:

Cracks in the drum can not be longer than _ the width of the friction area.

The air brake lag at 55 mph adds how many feet of stopping distance?

How do you correct a rear wheel acceleration skid?

Which of these systems should receive extra attention during cold weather inspections?

Can federal inspectors inspect your truck or bus?

Which of these statements about tires is true?

If you are not sure what to use to put out hazardous materials fires, you should:

When you are driving on grades, which of these is the best way to choose a safe speed?

When confronted by an aggressive driver, the very first thing you should do is.