Review Questions - Click On The Picture To Begin...
These Questions Are From The Illinois CDL Manual
- Make sure trailer brakes are locked and/or wheels chocked
- Connect safety chains, air hoses and light cords
- Close shut-off valves at rear of first trailer (and on dolly if so equipped)
- Back converter dolly under rear trailer
Quote From Page 81 Of The CDL Manual:
Connect converter dolly to rear trailer:
- Make sure trailer brakes are locked and/or wheels chocked.
- Make sure trailer height is correct. (It must be slightly lower than the center of the fifth wheel, so trailer is raised slightly when dolly is pushed under.)
- Back converter dolly under rear trailer.
- Raise landing gear slightly off ground to prevent damage if trailer moves.
- Test coupling by pulling against pin of number two semi-trailer.
- Make visual check of coupling. (No space between upper and lower fifth wheel. Locking jaws closed on kingpin.)
- Connect safety chains, air hoses and light cords.
- Close converter dolly air tank petcock and shut-off valves at rear of second trailer (service and emergency shut-offs).
- Open shut-off valves at rear of first trailer (and on dolly if so equipped).
- Raise landing gear completely.
- Charge trailers (push "air supply" knob in) and check for air at rear of second trailer by opening the emergency line shut-off. If air pressure is not there, something is wrong and the brakes will not work.
- Tell your dispatcher there is too much time on the load and ask for another dispatch
- Wait until the last available time to start heading to your delivery location
- Never show up early to a customer location
- Call ahead and ask the customer for an earlier appointment time
Quote From Page 0 Of The CDL Manual:
If you are picking up or delivering a load and have some time to spare on either the pick up or delivery times, call ahead and see if you can arrive early. This is an excellent way to ensure you complete the load quickly and become available for the next one. Customers are used to getting phone calls from truck drivers. Don't be afraid to call ahead.
- A traffic device that enables vehicles that are having braking problems to safely stop
- Another term for an on-ramp, connecting a side street to a major expressway
- A ramp to connect an expressway to a side street
- A device used to help climb into or out of a truck trailer
Quote From Page 43 Of The CDL Manual:
Brake failure on downgrades: Going slow enough and braking properly will almost always prevent brake failure on long downgrades. Once the brakes have failed, however, look outside your vehicle for something to stop it.
Your best hope is an escape ramp. If there is one, there will be signs posted. Ramps are usually located a few miles from the top of the downgrade. Every year, hundreds of drivers avoid injury to themselves or damage to their vehicles by using escape ramps. Some escape ramps use soft gravel that resists the motion of the vehicle and brings it to a stop. Others turn uphill, using the hill to stop the vehicle and soft gravel to hold it in place.
Any driver who loses brakes going downhill should use an escape ramp if available. If you do not use it, your chances of having a serious accident may be much greater. If no escape ramp is available, take the least hazardous escape route you can, such as an open field or a side road that flattens out or turns uphill. Make the move as soon as you know your brakes do not work. The longer you wait, the faster the vehicle will go and the harder it will be to stop.
- 60,000 pounds
- 22,000 pounds
- 65,000 pounds
- 80,000 pounds
Quote From Page 0 Of The CDL Manual:
- 20,000 pounds single axle weight
- 34,000 pounds tandem axle weight
- 80,000 pounds gross vehicle weight
- Bridge Formula Calculations
- Controls the emergency brakes
- Supplies air to the trailer air tanks
- Controls the parking brakes
- Carries air controlled by the foot brake or the trailer hand brake
Quote From Page 73 Of The CDL Manual:
The service line (also called the "control line" or "signal line") carries air controlled by the foot brake or the trailer hand brake. Depending on how hard you press the foot brake or hand valve, the pressure in the service line will similarly change. The service line is connected to relay valves. These valves allow the trailer brakes to be applied more quickly than would otherwise be possible.
- Increased air pressure
- Wheel lock-ups
- Pulling to one side or the other
- Lack of braking power
Quote From Page 37 Of The CDL Manual:
When driving in heavy rain or deep standing water, your brakes will get wet. Water in the brakes can cause the brakes to be weak, to apply unevenly or to grab. This can cause lack of braking power, wheel lock-ups, pulling to one side or the other, and jackknife if you pull a trailer.
During cold weather, wet brakes can also cause brake pads to freeze to the brake drums. Before parking, you can ride the brakes a bit to heat them up slightly and dry them out.
- A valve used to release the air lines from the tractor to the trailer
- The trailer release mechanism
- A lever which only controls the tractor service brakes
- A lever which only controls the trailer service brakes
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.
- Backing towards the drivers side offers better visibility than backing towards the right side
- Less accidents occur while backing towards the drivers side instead of the passenger side
- If you back and turn toward the driver's side, you can watch the rear of your vehicle by looking out the side window
- By backing towards the drivers side, you should be able to keep your window closed during inclement weather
Quote From Page 24 Of The CDL Manual:
Back to the driver's side so you can see better. Backing toward the right side is very dangerous because you cannot see as well. If you back and turn toward the driver's side, you can watch the rear of your vehicle by looking out the side window. Use driver-side backing-even if it means going around the block to put your vehicle in this position. The added safety is worth it.
Backing towards the passenger side is often referred to as "blind side backing." It is very dangerous due to low visibility and should be avoided whenever possible, especially in a combination vehicle.
- 1 inch of free play
- 3/4 inch of free play
- 1.5 inches of free play
- No free play at all
Quote From Page 116 Of The CDL Manual:
Engine compartment belts: Check the following belts for snugness (up to 3/4-inch play at center of belt), cracks or frays:
- Power steering belt.
- Water pump belt.
- Alternator belt.
- Air compressor belt.
When checking belts, tell the examiner:
The belt is not cracked, frayed, or broken and free play is between 1/2in and 3/4in."
- You will increase the weight on the steer axle and increase the weight on the drive axles
- You will increase the weight on the steer axle and take weight off the drive axles
- You will decrease the weight on the steer axle and take weight off the drive axles
- You will decrease the weight on the steer axle and it will have no effect on the drive axles