Review Questions - Click On The Picture To Begin...
These Questions Are From The Illinois CDL Manual
- There will be carbon soot collected into one area of the pipe
- All of these can be signs of an exhaust leak
- A loose fitting may cause a leak
- There will be rust visible in a particular spot
Quote From Page 119 Of The CDL Manual:
- Check system for damage and signs of leaks such as rust or carbon soot.
- System should be connected tightly and mounted securely.
While inspecting the exhaust system, tell the examiner:
"The exhaust should be properly mounted and secured, no loose clamps, no signs of leaks such as rust or soot, and it must contain no holes, cracks, or dents."
Quote From Page 36 Of The CDL Manual:
Make sure you have enough tread on your tires. The drive tires must provide traction to push the rig over wet pavement and through snow. The steering tires must have traction to steer the vehicle. Enough tread is especially important in winter conditions. You must have at least 4/32-inch tread depth in every major groove on front tires and at least 2/32-inch on other tires . More is better. Use a gauge to determine if you have enough tread for safe driving.
Weight Before Fueling: Steer: 11,275, drives: 33,750, gross: 77,220
- 110 gallons of fuel
- 112.75 gallons of fuel
- 88.5 gallons of fuel
- 104.16 gallons of fuel
Quote From Page 0 Of The CDL Manual:
250/30 = 8.33
8.33x100 = 833
833/8 = 104.13 gallons of fuel you can add
- During long or steep declines, the trailer hand valve should be used to protect against tractor brake fade
- It is only used to test the trailer service brakes
- Should be used to recover a trailer that has begun to jackknife
- Can be used in place of the parking brake
Quote From Page 73 Of The CDL Manual:
The trailer hand valve (also called the "trolley valve" or "Johnson bar") works the trailer brakes. The trailer hand valve should be used only to test the trailer brakes. Do not use it in driving because of the danger of making the trailer skid. The foot brake sends air to all the brakes on the vehicle (including the trailer(s'). There is much less danger of causing a skid or jackknife when using just the foot brake.
Never use the hand valve for parking because all the air might leak out, unlocking the brakes (in trailers that do not have spring brakes.) Always use the parking brakes when parking. If the trailer does not have spring brakes, use wheel chocks to keep the trailer from moving.
Many trucks no longer come with a trailer hand valve, but if your truck has one, you should use it only for testing the trailer service brakes and nothing more.
- There should be no loss of any psi in 1 minute
- Less than 2 psi in 1 minute
- Less than 1 psi in 1 minute
- Less than 3 psi in 1 minute
Quote From Page 66 Of The CDL Manual:
Test air leakage rate: With a fully-charged air system (typically 125 psi), turn off the engine, release the service brake, and time the air pressure drop. The loss rate should be less than 2 psi in 1 minute for single vehicles and less than 3 psi in 1 minute for combination vehicles. Then apply 90 psi or more with the brake pedal. After the initial pressure drop, if the air pressure falls more than 3 psi in 1 minute for single vehicles and more than 4 psi for combination vehicles, the air loss rate is too much. Check for air leaks, and repair before driving the vehicle. Otherwise, you could lose your brakes while driving.
You really need to memorize the allowable air leakage rates. This will very likely come up on your written exam and will come up again during the pre-trip exam. Here's what you should memorize (create flash cards if you have to).
With the service brakes released (not depressing the brake pedal):
- Air loss rate should be less than 2 psi in 1 minute for a single vehicle.
- Air loss rate should be less than 3 psi in 1 minute for combination vehicles (vehicles with a trailer).
With the service brakes depressed (pressing the brake pedal):
- Air loss rate should be less than 3 psi in 1 minute for a single vehicle.
- Air loss rate should be less than 4 psi in 1 minute for combination vehicles (vehicles with a trailer).
Be sure to have that memorized. Very important!!
Quote From Page 8 Of The CDL Manual:
A CDL holder may not operate a commercial vehicle with a BAC of .04 or more or a noncommercial vehicle with a BAC of .08 or more.
It is important to note that any CDL holder found operating a commercial vehicle with any level of alcohol in his or her system will be placed out of service for a minimum of 24hrs. Drivers will not be criminally charged unless their BAC is .04 or higher, but commercial drivers are not allowed to operate commercial vehicles with even a trace amount of alcohol in their system.
And don't even think about having any alcohol anywhere in the cab of the truck at anytime - not even in the side box. If you get caught with it, it will likely be the end of your job, and possibly worse.
steer: 11,100, drives: 32,600, gross: 71,400
steer:11,850, drives: 32,850, gross: 72,400
- 65% went on the steer axle
35% went on the drive axles
- 75% went on the steer axle
25% went on the drive axles
- 80% went on the steer axle
20% went on the drive axle
- 67% went on the steer axle
33% went on the drive axles
Quote From Page 0 Of The CDL Manual:
750/1000 = .75
.75 * 100 = 75% fuel weight to the steer tires
100% - 75% = 25% went on the drive axles.
- Total weight of a powered unit plus trailer(s) plus the cargo.
- Maximum safe weight a tire can carry at a specified pressure. This rating is stated on the side of each tire.
- Weight transmitted to the ground by one axle or one set of axles.
- Total weight of a single vehicle plus its load.
Quote From Page 52 Of The CDL Manual:
You are responsible for not being overloaded. Following are definitions of weights:
- Gross vehicle weight (GVW): Total weight of a single vehicle plus its load.
- Gross combination weight (GCW): Total weight of a powered unit plus trailer(s) plus the cargo.
- Gross combination weight rating (GCWR): Maximum GCW specified by the manufacturer for a specific combination of vehicles plus its load.
- Axle weight: Weight transmitted to the ground by one axle or one set of axles.
- Tire load: Maximum safe weight a tire can carry at a specified pressure. This rating is stated on the side of each tire.
- Suspension systems: Suspension systems have a manufacturer's weight capacity rating.
- Coupling device capacity: Coupling devices are rated for the maximum weight they can pull and/or carry.
- In the front glove box
- Within reach of the driver
- Under the passenger seat
- In a fire proof box such as a small safe
Quote From Page 102 Of The CDL Manual:
Do not accept a hazardous materials shipment without a properly prepared shipping paper. A shipping paper for hazardous material must always be easily recognized. Other people must be able to find it quickly after an accident.
- Clearly distinguish hazardous material shipping papers from others by tabbing them or keeping them on top of the stack of papers.
- When you are behind the wheel, keep shipping papers within your reach (with your seat belt on) or in a pouch on the driver's door. They must be easily seen by someone entering the cab.
- When not behind the wheel, leave shipping papers in the driver's door pouch or on the driver's seat.
- Emergency response information must be kept in the same location as the shipping paper.
It's good practice to keep hazardous materials shipping papers in the drivers side door pocket. This area is acceptable not only while driving, but also while parked.
- 50% the weight of the trailer
- More than 4,500 lbs
- Less than 10,000 lbs
- More than 10,000 lbs
Quote From Page 10 Of The CDL Manual:
What Does This Section Cover?
The requirements in this section apply to the transportation of heavy vehicles, equipment, and machinery that:
- Operate on wheels or tracks, such as front end loaders, bulldozers, tractors, and power shovels.
- Individually weigh more than 4500 kg (10,000 lb.).