- 16,000 lbs.
- 10,000 lbs.
- 8,000 lbs.
- 5,000 lbs.
Quote From Page 2 Of The CDL Manual:
The aggregate working load limit of all indirect tiedowns is the sum of the working load limits of each indirect tiedown.
- It doesn't matter.
- 90 degrees.
- Between 45 and 60 degrees.
- Less than 45 degrees.
Quote From Page 2 Of The CDL Manual:
The angle where the tiedown attaches to the vehicle should be shallow, not deep (ideally less than 45).
- All fluids from all air tanks drain into a central location which must be drained
- Automatic air tank drains always have to be drained manually as well
- Manually operated air tank drains normally use a handle or a cable to drain the system
- Air tank drains should be forced into the open position during dry weather so that they drain throughout the day
Quote From Page 62 Of The CDL Manual:
Air Tank Drains - Compressed air usually has some water and compressor oil in it, which is bad for the air brake system. For example, the water can freeze in cold weather and cause brake failure. The water and oil tend to collect in the bottom of the air tank. Be sure to drain the air tanks completely. Each air tank is equipped with a drain valve in the bottom. There are two types of drain valves:
- 1. Manually operated by turning a quarter turn or by pulling a cable. You must drain the tanks yourself at the end of each day of driving.
- 2. Automatic, in which the water and oil are automatically expelled. They may be equipped for manual draining as well.
The automatic types are available with electric heating devices. These help prevent freeze-up of the automatic drain in cold weather.
- 0 to 20 psi
- 50 to 70 psi
- 20 to 45 psi
- 100 to 125 psi
Quote From Page 73 Of The CDL Manual:
The trailer air supply control on newer vehicles is a red 8-sided knob used to control the tractor protection valve. Push it in to supply the trailer with air, and pull it out to shut the air off and put on the trailer emergency brakes. The valve will pop out, thus closing the tractor protection valve, when the air pressure drops into the range 20 to 45 psi. Tractor protection valve controls or "emergency" valves on older vehicles may not operate automatically. There may be a lever rather than a knob. The "normal" position is used for pulling a trailer. The "emergency" position is used to shut the air off and put on the trailer emergency brakes.
- It should be properly seasoned.
- Hardwood is recommended.
- It should be free of decay and structural defects.
- It should be painted.
Quote From Page 2 Of The CDL Manual:
If wood is used:
- Hardwood is recommended.
- It should be properly seasoned.
- It should be free from rot or decay, knots, knotholes, and splits.
- Steer jackknife and drive jackknife
- Tractor jackknife and trailer jackknife
- Front jackknife and rear jackknife
- Drive wheel jackknife and trailer wheel jackknife
Quote From Page 71 Of The CDL Manual:
Tractor Jackknife: Rear tractor wheels locked up or spinning.
Trailer Jackknife: Trailer wheels locked and sliding
- Hazard class and identification number
- Health tag
- Shipping route
- All of these answers are correct
Quote From Page 87 Of The CDL Manual:
The shipper:
- Sends products from one place to another by truck, rail, vessel or airplane.
- Uses the hazardous materials regulations to decide the product's:
- Proper shipping name
- Hazard class
- Identification number
- Correct packaging
- Correct label and markings
- Correct placards
- Must package, mark and label the materials, prepare shipping papers, provide emergency response information and supply placards.
- Must certify on the shipping paper that the shipment has been prepared according to the rules (unless you are pulling cargo tanks supplied by you or your employer)
TruckingTruth's Advice:
Be sure to understand the different responsibilities for:
- The shipper
- The carrier
- The driver
- The driver, the shipper, and the carrier.
- The driver and shipper.
- The shipper and carrier.
- The DOT and the FMCSA.
Quote From Page 2 Of The CDL Manual:
Cargo Securement Responsibility:
According to federal and state regulations, the carrier and driver are responsible for ensuring that the vehicles, anchor points and other securement components are in good working order, with no obvious signs of damage. The driver is also required to conduct a pre-trip inspection by other operating regulations.
- About 60 psi
- About 45 psi
- About 100 psi
- About 20 psi
Quote From Page 118 Of The CDL Manual:
At about 40 psi on a tractor-trailer combination vehicle, the tractor protection valve and parking brake valve should close (pop out).
TruckingTruth's Advice:
Important things to memorize:
- The low air pressure warning device will activate before 60 psi.
- The tractor protection valve will close (when the valve pops out) at about 40 psi.
All combination trucks are a bit different. Sometimes both valves will pop out at the same time, but generally the tractor protection valve (the red knob) will pop out first. When performing your brake test, continue depleting air pressure until both the red and yellow valves pop out. If both valves have not closed (popped out) and your air pressure is below 20psi, there is a problem in your brake system.
- Centered between your drive axles and your trailer tandems.
- Roughly centered between the steer axle and the trailer tandems
- Just slightly behind the tractor's drive axles
- About 10 feet to the rear the center point of the trailer