Term
The supply pressure gauge tells how many foot pounds is acting upon the S-cam.
True
or
|
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Definition
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|
Term
| Three different systems are found on modern air brake systems: service brakes, parking brakes, and… |
|
Definition
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Term
| To use the stab breaking technique during emergency braking, you |
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Definition
| Brake card with the pedal until the wheels lock, released pedal pressure until the wheels began rolling, then repeat again, if necessary. |
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Term
Trying to slow down for too high a speed to many times make calls too much heat build up in your air brakes.
True
or
False |
|
Definition
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|
Term
| Vehicles equipped with air brakes must… |
|
Definition
| Have an air pressure gauge and low pressure warning device |
|
|
Term
| What must you do to keep the spring emergency brakes or the parking brakes working? |
|
Definition
| Keep the service brakes in proper adjustment |
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|
Term
| What turns on the electrical stop light switch in an air brake system? |
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Definition
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Term
When the spring breaks come on, it indicates that the air pressure is at the upper limit.
True
or
False |
|
Definition
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|
Term
| When going down long or steep downgrades you should always… |
|
Definition
| Used to breaking effects of the engine |
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|
Term
| When going down a long downgrade in a new streamlined truck with a powerful drivetrain, the gear you should be in is… |
|
Definition
| A lower gear than the one used going up the grade |
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|
Term
| When using the parking brakes or emergency brakes, what type of pressure is being used? |
|
Definition
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|
Term
When the wheels lock up, you will continue going straight by holding the steering wheel Fernley and straight ahead and maintaining steady pressure on the brakes.
True
or
False |
|
Definition
|
|
Term
| When is "snubbing" the brakes on a long downgrade recommended? |
|
Definition
| It is not recommended: when braking is necessary, you should use light constant braking to maintain a safe speed |
|
|
Term
When air pressure drops too much, the spring breaks come on.
True
or
False |
|
Definition
|
|
Term
| When a failure occurs in the service break system, the system you need to stop the vehicle is the… |
|
Definition
|
|
Term
| When a driver depresses the brake pedal, what air brakesystem is he using? |
|
Definition
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|
Term
| When using brakes on a long and/or steep downgrade? |
|
Definition
| Use a low gear and go slow enough that a fairly light, steady use of the brakes will keep you from speeding up |
|
|
Term
| Which brake system applies and releases the brakes when the driver uses the break pedal? |
|
Definition
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|
Term
Which of the following is okay to find in the air brake system?
Oil
Air
Water
Air and Oil |
|
Definition
|
|
Term
| What color coding is used on glad hands? |
|
Definition
| The service breaks or color-coded blue and emergency brakes are color coded |
|
|
Term
Which of the following statements about brakes is true?
A. The heavier a vehicle or the faster it is moving, the more heat the brakes have to absorb to stop it.
B. Brakes have more stopping power when they get very hot
C. brake drums cool very quickly
D. all of the above are true |
|
Definition
|
|
Term
| Why should you not and the brakes on and off during long downgrades |
|
Definition
| The short time off the brakes does not allow brake cooling |
|
|
Term
With the engine at operating RPM, the air pressure should be old from 85 to 100 psi within 45 seconds dual air systems.
True
or
False |
|
Definition
|
|
Term
You should drain your air tanks at the end of each working day to remove moisture and oil.
True
or
False |
|
Definition
|
|
Term
You should avoid setting the parking brake…
- In freezing temperatures, if the brakes are wet.
- If the brakes are very hot.
- Both a and b
- None of the above
|
|
Definition
|
|
Term
| You lose steering control when… |
|
Definition
| Your steering tires lock up |
|
|
Term
| You must make a quick emergency stop. You should break… |
|
Definition
| So you can stay in a straight line and maintain steering control |
|
|
Term
You should not use the parking brakes when the brakes are very hot.
True
or
False |
|
Definition
|
|
Term
| Your airbrake safety relief valve has opened several times. This means… |
|
Definition
| You should have the system repaired |
|
|
Term
| Your vehicles single brake system (pre--1975) should… |
|
Definition
| Out-of-state Bill pressure from 50 to 90 psi within three minutes at Otto and be up graded to a dual system before driving |
|
|
Term
| These the vehicle must have a warning device which comes on when air pressure in the service air tanks follows below… |
|
Definition
|
|
Term
| All vehicles equipped with air brakes have… |
|
Definition
|
|
Term
| If you do not have automatic tank drains: how often should you drain all in water from the bottom of the compressed air storage tanks? |
|
Definition
| At the end of each day of driving |
|
|
Term
| Which of the following makes total stopping distance longer for air brakes then for hydraulic brakes? |
|
Definition
|
|
Term
| The air loss rate for a straight truck with the engine off in the brakes on should be no more than… |
|
Definition
|
|
Term
| The brake system then applies and releases the brakes when the driver uses the brake pedal is the____brake system |
|
Definition
|
|
Term
| Before driving a vehicle with a dual air system, allow time for the air compressor to build up a minimum of____psi pressure in both the primary and secondary systems |
|
Definition
|
|
Term
| The application pressure gauge shows how much air pressure you… |
|
Definition
| Or applying to the brakes |
|
|
Term
| Why should you drain water from compressed air tanks? |
|
Definition
| Water can freeze in cold weather and cause brake failure |
|
|
Term
| Emergency stab breaking is when… |
|
Definition
| You break as hard as you can, release the break when the wheels locked, then put on the brakes again when the wheels start rolling again |
|
|
Term
| Your vehicle has a dual air brake system. If a low air pressure warning comes on for the secondary system, you should… |
|
Definition
| Bring the vehicle to a safe stop and continue only when the system is fixed |
|
|
Term
| Your brakes are fading when… |
|
Definition
| You have to push harder on the break pedal to control your speed on a downgrade |
|
|
Term
| What can legally hold a parking or emergency brake in position for a truck, truck tractor, or bus? |
|
Definition
|
|
Term
| If your truck or bus has dual parking control valves, it means that you can use pressure from a separate tank to… |
|
Definition
| Release the spring breaks to move a short distance |
|
|
Term
| To check the free play or manual slack adjusters on 2-cam breaks you should… |
|
Definition
| Park on level ground, chock the wheels, and released the parking brakes |
|
|
Term
Modern air brake system include which of the following.]
- Service brakes
- parking brakes
- emergency brakes
- all of the above
|
|
Definition
|
|
Term
| Air breaking takes more time than hydraulic braking because air brakes… |
|
Definition
| Need to have airflow through the lines to work |
|
|
Term
| If your vehicle has alcohol evaporator, every day during cold weather you should… |
|
Definition
| Check infield the alcohol level |
|
|
Term
| When driving Denning long steep Hill you should use a low gear and… |
|
Definition
| Go slow enough that a fairly light, steady use of the brakes will keep you from speeding up |
|
|
Term
| During normal driving, spring breaks are usually held back by… |
|
Definition
|
|
Term
| Vehicles with air brakes must have… |
|
Definition
| An air pressure gauge to show the pressure available for breaking |
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