Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
25 Cards in this Set
- Front
- Back
|
The use of air brakes on a downgrade is only a supplement to the:
|
Braking effect of the engine
|
|
|
Your truck has properly functioning dual air brake system an minimum size air tanks. The air pressure should build from 85-100 psi within...... Seconds
|
45
|
|
|
If your truck or bus has dual parking control valves, you can use pressure from a separate tank to:
|
Release the spring emergency parking brakes to move a short distance
|
|
|
The proper method of breaking wind going down 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 breaks
|
5
|
|
|
It is not safe to drive a vehicle that has brake drums or disk with cracks or that are thinner than the manufacturers specifications, generally this will be.....inch
|
1/4
|
|
|
The air brake system for a straight truck or bus should not leak at a rate more then.....psi permanent with the engine off and the brakes released
|
2
|
|
|
The braking power of the spring breaks:
|
Depends on the service breaks being in adjustment
|
|
|
If your truck has dual air brake system and one of the systems is low on pressure:
|
Either the front or rear brakes will not be fully operational
|
|
|
The parking or emergency brakes of trucks and buses can legally be held on by......pressure
|
Spring
|
|
|
Modern airbrake systems are three different systems combined together. They are the service, parking, and....brakes
|
Emergency
|
|
|
That air supply pressure and gauge shows how much pressure:
|
Is in the air tanks
|
|
|
If you must make an emergency stop, brake so you:
|
Can steer and your vehicle stays in a straight line
|
|
|
If your vehicle has an alcohol evaporator, it is there to:
|
Reduce the risk of ice and airbrake valves in cold-weather
|
|
|
The airbrake like distance at 55 mph on dry pavement adds about.....feet to your stopping distance
|
32
|
|
|
The spring breaks use on tractors and straight trucks will bring your truck to a stop when the air pressure drops below.....psi
|
20
|
|
|
A supply pressure gauge tells you how much pressure is in the:
|
Air tanks
|
|
|
When you apply the brakes, the brake shoes/linings are pressed against the:
|
Brake drums
|
|
|
Air braking takes more time than hydraulic breaking because air:
|
Takes more time to flow through the lines then hydraulic fluid
|
|
|
During normal driving, spring breaks are usually held back by:
|
Air pressure
|
|
|
Some airbrakes have a alcohol evaporator. What may happen if you don't keep the unit filled with alcohol
|
Ice may form in the air storage tanks and cause brakes to fall
|
|
|
The brake system that applies and releases the brakes when the driver uses the brake pedal is the....brake system
|
Service
|
|
|
In airbrake vehicles, the parking brakes should be used:
|
Anytime the vehicle is parked
|
|
|
Excessive heat in the brakes can cause the:
|
Breaks to fade or fall
|
|
|
To test air Service breaks you should:
|
Break firmly when slowly moving forwards
|
|
|
You should know your brakes are fading when:
|
You have to push the brake pedal harder to control speed on a downgrade
|
