Review Questions - Click On The Picture To Begin...
These Questions Are From The Illinois CDL Manual
- It depends on the weight of the load
Quote From Page 10 Of The CDL Manual:
Special Circumstances: Securing Heavy Vehicles, Equipment, or Machinery with Crawler Tracks or Wheels
- Restrain cargo using a minimum of four tiedowns, each having a WLL of at least 2,268 kg (5,000 lb.).
- Prevents cargo movement in the side-to-side, forward, rearward, and vertical directions.
- Either at the front and rear of the vehicle.
- Or at the mounting points on the vehicle designed for that purpose.
- Make sure there is enough grease
- Check that there is no visible space between the upper and lower fifth wheel
- Ensure the release arm is properly seated and the safety latch is unlocked
- Be certain the locking jaws are around shank and not the head of the kingpin
Quote From Page 82 Of The CDL Manual:
Check fifth wheel (lower)
- Securely mounted to frame
- No missing, damaged parts
- Enough grease
- No visible space between upper and lower fifth wheel
- Locking jaws around shank, not head of kingpin
- Release arm properly seated and safety latch/lock engaged
Check Fifth wheel (upper)
- Glide plate securely mounted to trailer frame
- Kingpin not damaged
- Attach at least one tiedown over the top of each coil or side-by-side row, located near the front of the coil.
- Attach at least one tiedown through the center of each row of coils.
- Use blocking or friction mats to prevent forward movement.
- Attach at least one tiedown over the top of each coil or side-by-side row, located near the rear of the coil.
Quote From Page 5 Of The CDL Manual:
Attach at least one tiedown over the top of each coil or side-by-side row, located near the front of the coil.
Attach at least one tiedown over the top of each coil or side-by-side row, located near the rear of the coil.
Use blocking or friction mats to prevent forward movement.
- 1.5 inches of free play
- No free play at all
- 1 inch of free play
- 3/4 inch of free play
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."
- The distance from the drive axles to the trailer tandems
- The amount of fuel you have onboard
- The distance between the locking pin holes
- The center of gravity of the cargo
Quote From Page 0 Of The CDL Manual:
- A red 8-sided knob used to control the tractor protection valve
- There is no control for the trailer air supply on newer vehicles as it's all done automatically
- A yellow diamond shaped knob used to control the tractor parking brake
- A lever on the side of the steering wheel used to control the trailer hand valve
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.
- Yes, but only the air horn has to function properly
- Yes, but only the electric horn has to function properly
- Yes, both the electric horn and the air horn must be shown to work properly
- No, the horns do not need to be checked during a pre-trip inspection
Quote From Page 117 Of The CDL Manual:
Check that air horn and/or electric horn work.
While laws vary from state to state, when taking your pre-trip exam, you should demonstrate that both the city (electric) horn and the air horn function properly. As you're demonstrating, here's what to say:
"I am now checking the city horn and the air horn to be sure they are both properly functioning."
This is one thing that many people forget to do when taking the pre-trip exam. Don't forget the horns!
- One hand on the steering wheel and one hand on the gear shift
- One hand on the steering wheel and one hand on or near the air horn
- One hand on the steering wheel and one hand on the emergency brake
- Keep both hands on the steering wheel
Quote From Page 128 Of The CDL Manual:
When driving through an intersection:
- Check traffic thoroughly in all directions.
- Decelerate and yield to any pedestrians and traffic in the intersection.
- Do not change lanes or shift gears while proceeding through the Intersection.
- Keep your hands on the wheel.
The examiners actively check to see your hand placement. Whenever possible, keep both hands on the wheel. This is especially true while driving through an intersection.
- Tells you how much pressure is in the air tanks
- Application pressure gauges must be installed on all commercial vehicles
- Let's you know when air pressure in the tanks are too low
- Shows how much air pressure you are applying to the brakes
Quote From Page 64 Of The CDL Manual:
Application Pressure Gauge - This gauge shows how much air pressure you are applying to the brakes. (This gauge is not on all vehicles.) Increasing application pressure to hold the same speed means the brakes are fading. You should slow down and use a lower gear. The need for increased pressure also can be caused by brakes out of adjustment, air leaks or mechanical problems.
- Air compressors may have their own oil supply or be lubricated by engine oil
- The air compressor is connected to the engine through gears or a V-belt
- The air compressor pumps air into the air storage tanks
- Air compressors are always air cooled
Quote From Page 62 Of The CDL Manual:
The air compressor pumps air into the air storage tanks (reservoirs). The air compressor is connected to the engine through gears or a V-belt. The compressor may be air cooled or may be cooled by the engine cooling system. It may have its own oil supply or be lubricated by engine oil. If the compressor has its own oil supply, check the oil level before driving.