Review Questions - Click On The Picture To Begin...
These Questions Are From The Illinois CDL Manual
- Use the tractor parking brake and or chock the wheels to hold the vehicle
- If you do NOT hear air escaping from both lines, check that the shut-off valves on the trailer(s) and dolly are in the OPEN position
- Wait for air pressure to reach normal, then push in the yellow "tractor air supply" knob
- Open the emergency line shut-off valve at the rear of the last trailer. You should hear air escaping, showing the entire system is charged
Quote From Page 82 Of The CDL Manual:
Check air flow to all trailers: Use the tractor parking brake and or chock the wheels to hold the vehicle. Wait for air pressure to reach normal, then push in the red "trailer air supply" knob. This will supply air to the emergency (supply) lines. Use the trailer handbrake to provide air to the service line. Go to the rear of the rig. Open the emergency line shut-off valve at the rear of the last trailer. You should hear air escaping, showing the entire system is charged. Close the emergency line valve. Open the service line valve to check that service pressure goes through all the trailers (this test assumes that the trailer handbrake or the service brake pedal is on), then close the valve. If you do NOT hear air escaping from both lines, check that the shut-off valves on the trailer(s) and dolly (5) are in the OPEN position. You MUST have air all the way to the back for all the brakes to work.
- Set out reflective triangles to warn other traffic
- Put road flares on the ground near disabled vehicles
- Activate your emergency flashers
- If possible, move your vehicle to the side of the road
Quote From Page 45 Of The CDL Manual:
The first thing to do at an accident scene is to keep another accident from happening at the same spot.
- If your vehicle is involved in the accident, try to get it to the side of the road. This will help prevent another accident and allow traffic to move.
- If you are stopping to help, park away from the accident. The area immediately around the accident will be needed for emergency vehicles.
- Put on your flashers.
- Set out reflective triangles to warn other traffic. Make sure they can be seen by other drivers in time for them to avoid the accident.
- Do not put road flares on the ground near wrecked vehicles. Road flares could ignite any leaking flammable liquids.
TruckingTruth's Advice:
As long as you always practice safe driving techniques, you probably will never be involved in a major accident. However, it is very likely you'll see a major accident occur or be one of the first people on scene. First and foremost, remember to protect yourself. Many good samaritans end up injuring themselves by stepping into a traffic lane, slipping on fluids spilled onto the roadway, or cutting themselves on debris from the accident. Don't become another victim!
While using road flares may be ok in some situations, remember that after an accident, flammable liquids may leak and spread along the ground, so it's best to use warning devices which don't have an ignition source, such as reflective warning triangles.
- Carries air controlled by the foot brake or the trailer hand brake
- Controls the emergency brakes
- Controls the parking brakes
- Supplies air to the trailer air tanks
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.
- 2 x 4 in
- 8 x 10 in
- Half the diameter of the pipe
- 4 x 6 in
Quote From Page 7 Of The CDL Manual:
Blocking must be:
- Placed against the pipe
- Secured to prevent it from moving out from under the pipe.
Timber blocking must have a minimum nominal dimension of 10 x 15 cm (4 x 6 in).
- An EPA certificate of responsible waste disposal
- A temporary government waste spill insurance policy
- A Uniform Hazardous Waste Manifest
- A hazardous waste release form
Quote From Page 94 Of The CDL Manual:
When transporting hazardous waste, you must sign by hand and carry a Uniform Hazardous Waste Manifest. The name and EPA registration number of the shippers, carriers and destination must appear on the manifest. Shippers must prepare, date and sign by hand the manifest. Treat the manifest as a shipping paper when transporting the waste. Only give the waste shipment to another registered carrier or disposal/treatment facility. Each carrier transporting the shipment must sign by hand the manifest. After you deliver the shipment, keep your copy of the manifest. Each copy must have all needed signatures and dates, including those of the person to whom you delivered the waste.
- All tankers have baffle devices to limit sloshing of liquids
- Liquid tankers are easier to roll over
- Tanker vehicles have a higher center of gravity
- Liquid tankers are harder to stop in an emergency than other types of vehicles
Quote From Page 84 Of The CDL Manual:
Hauling liquids in tanks requires special skills because of the high center of gravity and liquid movement. A high center of gravity means that much of the load's weight is carried high up off the road. This makes the vehicle top-heavy and easy to roll over. Liquid tankers are especially easy to roll over. Tests how that tankers can turn over at the speed limits posted for curves. Take highway curves and on-ramp/off-ramp curves well below the posted speed limits.
- Maximum safe weight a tire can carry at a specified pressure
- Total weight of a single vehicle plus its load
- Weight transmitted to the ground by one axle or one set of axles
- None of these answers are correct
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.
- There are no barriers inside to slow down or stop liquid from surging
- There are barriers in the tank with holes in them to slow down and restrict surging liquid
- Liquid is held in place by multiple barriers, restricting liquid surge
- Small tanks which are loaded and secured onto flatbed trailers
Quote From Page 84 Of The CDL Manual:
Unbaffled liquid tankers (sometimes called "smooth bore" tanks) have nothing inside to slow down the flow of the liquid. Therefore, forward-and-back surge is very strong. Unbaffled tanks are usually those that transport food products (e.g., milk). (Sanitation regulations forbid the use of baffles because of the difficulty in cleaning the inside of the tank.) Be extremely cautious (slow and careful) in driving smooth bore tanks, especially when starting and stopping.
TruckingTruth's Advice:
Unbaffled tankers are much more dangerous to drive, especially when the tanks aren't completely full, as liquid can surge and slosh around in any direction hindering vehicle control.
- Air storage tanks release excess air pressure in the brake system
- Air storage tanks are used to hold compressed air
- Air storage tanks are used to keep the parking brakes active while stopped
- 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.
- Vehicle damage or leaning to one side
- Fresh oil, coolant, grease or fuel leaks
- Hazards to vehicle movement (people, other vehicles, objects, low hanging wires, limbs, etc.)
- All of these answers are correct
Quote From Page 16 Of The CDL Manual:
Approaching the vehicle: Notice its general condition. Look for damage or vehicle leaning to one side. Look under the vehicle for fresh oil, coolant, grease or fuel leaks. Check the area around the vehicle for hazards to vehicle movement (people, other vehicles, objects, low hanging wires, limbs, etc.).
TruckingTruth's Advice:
Sometimes, being close up to a vehicle can force you to miss some obvious hazards. Take a moment to get the "full picture" when walking up to your vehicle.