Review Questions - Click On The Picture To Begin...
These Questions Are From The Illinois CDL Manual
- The rear trailer
- The tractor is more likely to turn over than either trailer
- The front trailer
- Both trailers are equally as likely to turn over
Quote From Page 70 Of The CDL Manual:
Trucks with trailers have a dangerous "crack-the-whip" effect. When you make a quick lane change, the crack-the-whip effect can turn the trailer over. There are many accidents where only the trailer has overturned.
"Rearward amplification" causes the crack-the-whip effect. The rear trailer is twice as likely to turn over as the tractor. You can roll the last trailer of triples 3.5 times as easily as a 5-axle tractor-semi.
TruckingTruth's Advice:
When pulling more than 1 trailer, the rear-most trailer is always at a higher risk of overturning than the front trailer.
- 50 feet
- 60 feet
- 48 feet
- 53 feet
Quote From Page 9 Of The CDL Manual:
Length
No vehicle with or without a load, other than a semitrailer, shall exceed a length of 42 feet. Semitrailers may have an overall length of 53 feet, including the load being carried.
- HA
- HT
- HZ
- HM
Quote From Page 86 Of The CDL Manual:
Hazardous materials are products that pose a risk to health, safety and property during transportation. The term often is shortened to HAZMAT, which you may see on road signs, or HM in government regulations.
- Any driver operating a CMV or non-CMV who refuses to submit to chemical testing or submits to a test with results in excess of the legal limit
- All of these will disqualify a CDL holder for 12 months
- Any driver convicted of DUI (regardless of BAC)
- Anyone convicted of driving a commercial motor vehicle with any amount of drug, substance or compound resulting from unlawful use or consumption of cannabis listed in the Cannabis Control Act or controlled substance listed in the Controlled Substance Act
Quote From Page 8 Of The CDL Manual:
Law requires drivers operating a commercial motor vehicle (CMV) or a non-commercial motor vehicle (nonCMV) on highways to automatically give their consent to submit to certain tests to determine blood-alcohol concentration (BAC). 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.
- Any driver operating a CMV or non-CMV who refuses to submit to chemical testing or submits to a test with results in excess of the legal limit is disqualified for a minimum 12 months.
- Any driver convicted of DUI (regardless of BAC) is disqualified for a minimum 12 months.
- If either violation above takes place while transporting placarded hazardous materials, the driver is disqualified for a minimum three years.
- A driver who commits two of the above violations, arising from two or more incidents, is disqualified for life.
- A CDL holder operating a CMV found to have any alcohol in his or her system is placed out of service for at least 24 hours.
- Anyone convicted of driving a commercial motor vehicle with any amount of drug, substance or compound resulting from unlawful use or consumption of cannabis listed in the Cannabis Control Act or controlled substance listed in the Controlled Substance Act is disqualified for a minimum 12 months.
TruckingTruth's Advice:
Please note the limit to be criminally charged for DUI when operating a commercial vehicle is a BAC of .04. However, anyone caught operating a commercial vehicle with any amount of alcohol will be placed out of service for a minimum of 24hrs. Most trucking companies will immediately discharge a driver caught with any amount of alcohol in their system.
- Tiedowns should be located in valleys or notches across the top of the boulder.
- Boulders must be loaded as far back towards the rear as possible.
- Tiedowns must be arranged to prevent sliding across the rock surface.
- Use only chain to secure large boulders.
Quote From Page 13 Of The CDL Manual:
Requirements
Use only chain to secure large boulders.
Tiedowns in direct contact with the boulder:
Should be located in valleys or notches across the top of the boulder
Must be arranged to prevent sliding across the rock surface.
- 40 feet
- 100 feet
- 142 feet
- 70 feet
Quote From Page 29 Of The CDL Manual:
Perception distance is The distance your vehicle travels, in ideal conditions; from the time your eyes see a hazard until your brain recognizes it. Keep in mind certain mental and physical conditions can affect your perception distance. It can be affected greatly depending on visibility and the hazard itself. The average perception time for an alert driver is 1¾ seconds. At 55 mph this accounts for 142 feet traveled.
TruckingTruth's Advice:
Perception time and distance should be memorized as it will very likely show up on your written exam.
- The overall gross weight of the vehicle and the maximum percentage of weight on trailer tandems
- The Bridge Formula and the maximum allowed length from Kingpin to trailer tandems.
- The tire load rating of the drive axle tires and the minimum clearance law
- The maximum width of 8' 6" on Interstate Highways and the maximum trailer length law
Quote From Page 0 Of The CDL Manual:
- You will put less weight on the trailer tandems than the cargo itself weighs, and you will actually add a little bit of weight to the drive axles at the same time.
- You will put more weight on the trailer tandems than the cargo itself weighs, and you will actually take a little bit of weight off the drive axles at the same time.
- The center of gravity will be moved toward the front of the trailer and you will have to slide the trailer tandems all the way to the rear of the 53 foot trailer
- You will evenly distribute the load across the drive axles and trailer tandems, but the steer axle could now be overweight
Quote From Page 0 Of The CDL Manual:
- The city or town you are in
- The county you are in
- All of these must be documented
- The state you are in
Quote From Page 0 Of The CDL Manual:
Remarks: This is the area where you must list the city, town, or village, and state abbreviation when a change of duty status occurs. You should also explain any unusual circumĀstances or log entries that may be unclear when reviewed later, such as encountering adverse driving conditions.
TruckingTruth's Advice:
Law enforcement officers will check all of your paperwork, including receipts or toll records, to make sure your logs are showing the correct locations at the correct times.
- Air storage tanks are used to keep the parking brakes active while stopped
- Air storage tanks release excess air pressure in the brake system
- Air storage tanks are used to hold compressed air
- Air storage tanks transfer air from the tractor to the trailer on combination vehicles
Quote From Page 62 Of The CDL Manual:
Air storage tanks are used to hold compressed air. The number and size of air tanks vary among vehicles. The tanks will hold enough air to allow the brakes to be used several times even if the compressor stops working.