2nd - cdl_coosa_ Flashcards
2nd - CDL-Coosa (165 cards)
Question:
1. The parking or emergency brake on a heavy can only be held in position by something that cannot leak away, like?
- Fluid pressure
- Spring pressure
- Air pressure
- Any of the above
Spring pressure
Question:
2. A straight truck or bus air break system should not leak at a rate of more than ____ psi per minute with the engine off and the brakes released?
- 1
- 2
- 3
- 4
2
Question:
3. Your vehicle has a dual-air brake system. If a low air pressure warning comes on for the secondary system, you should?
- Bring the vehicle to a safe stop and continue only when the system is fixed.
- Reduce your speed, and test the remaining system while under way.
- Reduce your speed, and drive to the nearest garage for repairs.
- Continue at normal speed if only the secondary system fails.
Bring the vehicle to a safe stop and continue only when they system is fixed.
Question:
4. If your vehicle has an alcohol evaporator, it is there to?
- Rid the wet tank of alcohol that condenses and sits at the bottom
- Eliminate the need for daily tank draining
- Boost tank pressure the same ay that supercharges boost engines
- Reduce the risk of ice in air brake valued in cold weather
Reduce the risk of ice in air brake valued in cold weather
Question:
5. Air braking takes more time than hydraulice braking because air?
- Brakes use different brake drums
- Takes more time to flow through the lines than hydraulice air
- Brakes require heavire return spring
- Is always leaking thorugh air line fittings.
Takes more time to flow through the lines than hydraulice air
Question:
6. The brake pedal in an air brake system?
- Controls the speed of the air compressor
- Always needs to be held down halfway during normal driving
- Controls the air pressure applied to put on the brakes
- Is connected to slack adjusters by a series of rods and linkages
Controls the air pressure applied to put on the brakes
Question:
7. If your truck or bus has dual parking control values, you can use pressure from a separate tank to?
- Release the spring emergency/parking brakes to move a short distance
- Apply more brake pressure if the main tank is getting low
- Stay parked twice as long with your service air pressure
- Balance the service brake system whenever you are parked
Release the spring emergency/parking brakes to move a short distance
Question:
8. Modern air brake system combine three different system. They are the service, parking and the ___ brakes?
- Emergency
- Foot
- S-cam
- Drum
Emergency
Question:
9. To check the free play of manual slack adjusters on S-cam brakes, you should park on?
- Level ground with parking brake, then apply the service brake
- Level ground, chock the wheels, and turn off the parking brakes
- Level ground, and drain off air pressure before adjusting
- A slight grade, release the parking brakes apply the service brakes and check for vehicle movements.
Level ground, chock the wheels, and turn off the parking brakes
Question:
10. Of the choice below, the first thing to do when a low aire pressure warning comes on is?
- Stop and safely park as soon as possible
- Shift to the next higher gear
- Adjust the brake pedal for more travel
- Open the air supply control valve
Stop and safely park as soon as possible
Question:
11. The air compressor governor controls?
- The speed of the air compressor
- When the brake chambers release pressure
- Air pressure applied to the brakes
- When air is pumped into the air tanks
When air is pumped into the air tanks
Question:
12. The braking power of the springs brakes?
- Is not affected by the condition of the service brakes
- Can only be tested by highly-trained brake service people
- Depends on the service brakes being in adjustment
- Increases when the service brakes are hot
Depends on the service brakes being in adjustment
Question:
13. All air brakes equipped vehicles have?
- At least one brake heater
- A hydraulic system, in case the air system fails
- A supply pressure gauge
- An air use gauge
A supply pressure gauge
Question:
14. If you must make an emergency stop, brake so you?
- Can steer hard while braking hard
- Use the full power of the brakes and lock them
- Can steer and your vehicle
- Use the hand brake first
Can steer and your vehicle
Question:
15. The application pressure gauge shows how much air pressure you?
- Have used in this trip
- Have in the air tanks
- Air applying to the brakes
- Use the hand brake first
Air applying to the brakes
Quyestion:
16. If you do not have automatic tank drains, how often should you drain the oil and water from the bottom of compressed air storafe air tanks?
- After every four hours of service
- At the end of each day driving
- Once a week
- Every other week
At the end of each day driving
Question:
17. You should know that your brakes are fading when?
- You have to push harder on the brake pedal to control your speed on a downgrade
- The brake pedal feels spongy when pressure is applied
- Pressure on the brake pedal is release and speed increases
- Less pressure is needed on the brake pedal for each stop
You have to push harder on the brake pedal to control your speed on a downgrade
Question:
18. If your vehicle has an alcohol evaportaor, every day during cold weatheer you should?
- Change the alcohol from a new bottle
- Clean the air filter with alcohol
- Check the oil for alcohol content
- Check and fill the alcohol level
Check and fill the alcohol level
Question:
19. If your truck or bus has dual parking control valves, you can use pressure from a separate tank to?
- Balance the service brake system when you are parked
- Stay parked twice as long without using service air pressure
- Release the spring emergency/parking brakes to move a short distance
- Brake harder if the main tank is getting low
Release the spring emergency/parking brakes to move a short distance
Question:
20. To check the free play of manual slack adjuster of S-cam brakes, you should park on?
- Level ground and apply the parking brakes
- Level ground, chock the wheels and release the parking brakes
- Level ground and drain off air pressure before checking the adjustment
- A slight grade, release the parking brakes, and apply the service brakes watching for vehicle movements
Level ground, chock the wheels, and release the parking brakes
Question:
21. The most important thing to do when a low air pressure warning comes on is?
- Upshift
- Downshift
- Adjust the brake pedal for more travel
- Stop and safely park as soon as possible
Stop and safely park as soon as possible
Question:
22. The air compressor governor controls?
- The speed of the air compressor
- Air pressure applied to the brakes
- When air is pumped into the air tanks
- When the brake chambers release pressure
When air is pumped into the air tanks
Question:
23. The braking power of the spring brakes?
- Increases when the service brakes are hot
- Depends on the service brakes being in adjustment
- Is not affected by the condition of the service brakes
- Can only be tested by highly-trained brake service people
Depends on the service brakes being in adjustment
Question:
24. All air brakes equipped vehicles have?
- An air use gauge
- A supply pressure gauge
- At least one brake heater
- A backup hydraulic system
A supply pressure gauge