Review Questions - Click On The Picture To Begin...
These Questions Are From The Illinois CDL Manual
- Wet roads have little effect on stopping distance
- Wet roads can double stopping distance
- Wet roads can decrease stopping distance by washing away oil and other foreign liquids from the roadway surface
- Wet roads can triple stopping distance
Quote From Page 29 Of The CDL Manual:
It will take longer to stop and be harder to turn without skidding when the road is slippery. You must drive slower to be able to stop in the same distance as on a dry road. Wet roads can double stopping distance. Reduce speed by about one-third (e.g., slow from 55 to 35 mph) on a wet road. On packed snow, reduce speed by half or more. If the surface is icy, reduce speed to a crawl and stop driving as soon as you can safely do so.
- Stopping before a railroad crossing is never allowed
- The nature of the cargo makes a stop mandatory under state or federal law
- All commercial vehicles are required to stop at all railroad crossings
- Commercial vehicles only need to stop at railroad crossings without gates
Quote From Page 38 Of The CDL Manual:
A complete stop is required at a grade crossing when:
- The nature of the cargo makes a stop mandatory under state or federal regulations.
- Such a stop is otherwise required by law.
- The overall length of the cargo after being loaded into the trailer.
- The average height of the cargo above the trailer floor.
- The distance from the front of the trailer to the center point of the cargo.
- The center point of the cargo's weight.
Quote From Page 0 Of The CDL Manual:
- All of these can legally be carried on a commercial bus
- Small-arms ammunition
- Emergency shipments of medical drugs or chemicals
- Hospital supplies
Quote From Page 56 Of The CDL Manual:
Buses may carry small-arms ammunition, emergency shipments of drugs, chemicals and hospital supplies. You can carry small amounts of some other hazardous materials if the shipper cannot send them any other way.
Even if you don't plan to obtain a passenger endorsement for your CDL, you will still be required to have a basic understanding of some general rules and regulations for transporting passengers.
- Nature of the explosives transported
- Names and telephone numbers of people to contact (including carrier agents or shippers)
- Precautions to take in emergencies such as fires, accidents, or leaks
- All of these must be included
Quote From Page 102 Of The CDL Manual:
Papers for Division 1.1, 1.2 or 1.3 Explosives A carrier must give each driver transporting Division 1.1, 1.2 or 1.3 (Class A or B) explosives a copy of Federal Motor Carrier Safety Regulations (FMCSR), Part 397. The carrier also must give written instructions on what to do if delayed or in an accident. The written instructions must include:
- Names and telephone numbers of people to contact (including carrier agents or shippers).
- Nature of the explosives transported.
- Precautions to take in emergencies such as fires, accidents, or leaks.
Drivers must sign a receipt for these documents.
You must be familiar with and have in your possession while driving:
- Shipping papers.
- Written emergency instructions.
- Written route plan.
- Copy of FMCSR, Part 397.
- 4 inches apart - 250 pounds per hole
6 inches apart - 400 pounds per hole
- 4 inches apart - 450 pounds per hole
6 inches apart - 200 pounds per hole
- 6 inches apart - 350 pounds per hole
8 inches apart - 550 pounds per hole
- 6 inches apart - 250 pounds per hole
10 inches apart - 500 pounds per hole
Quote From Page 0 Of The CDL Manual:
- No more than 3 psi in 1 minute
- No more than 6 psi in 1 minute
- No more than 4 psi in 1 minute
- No more than 5 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!!
- Hold the steering wheel very firmly until you come to a complete stop
- Use the "stab braking" method
- Stay off the brake and slow down very gradually
- Once stopped, visually check all tires as well as any damage flying tire debris may have cause to your vehicle
Quote From Page 44 Of The CDL Manual:
Hold the steering wheel firmly - If a front tire fails, it can twist the steering wheel out of your hand. The only way to prevent this is to keep a firm grip on the steering wheel with both hands at all times.
- Stay off the brake - It is natural to want to brake in an emergency. However, braking when a tire has failed could cause loss of control. Unless you are about to run into something, stay off the brake until the vehicle has slowed down. Then brake very gently, pull off the road and stop.
- Check the tires - After you have come to a stop, get out and check all the tires. Do this even if the vehicle seems to be handling all right. If one of your dual tires goes, the only way you may know it is by getting out and looking at the tires.
Having a tire blowout is very likely to occur during your driving career. When a blowout occurs, it's important to stay calm. Most accidents from tire blowouts occur due to drivers becoming spooked and overreacting. Stay calm and don't make any sudden or erratic movements. After the initial blowout, do not use your brakes. Allow the vehicle to slow down very gradually and once you're sure you have full control of the vehicle, start using gentle brake pressure and find a safe location to pull over.
Never go into the roadway to remove tire debris. If the debris is causing a traffic hazard, notify authorities about the situation and warn other truckers by using a CB Radio, if equipped..
- High-beam headlights
- Brake lights
- All of these things must be checked
Quote From Page 118 Of The CDL Manual:
Lights/reflectors: Check that all external lights and reflective equipment are clean and functional. Light and reflector checks include:
- Clearance lights (red on rear, amber elsewhere)
- Headlights (high and low-beams); taillights
- Turn signals
- 4-way flashers
- Brake lights
- Red reflectors (on rear) and amber reflectors (elsewhere)
Note: Checks of brake turn signal and 4-way flasher functions must be done separately.
While it may get a bit repetitive, during the pre-trip exam you need to point out and identify every light and reflector on both the truck and the trailer. Make sure all lights and reflectors are functioning properly, are clearly visible, properly mounted and secured, and not cracked or broken.
- They are used to transport air from the tractor to the trailer on combination vehicles
- They are used to hold compressed air for the air brake system
- They are used to supply air to the emergency brakes in the event of an air compressor failure
- They are used to supply air to the air compressor
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.
In an air brake system, emergency brakes naturally want to activate. It is the air pressure which holds the emergency brakes back and keeps them from activating. Therefor, air is not required for emergency brakes to function. Rather, if air is depleted from the air tanks, the emergency brakes will automatically engage.