Review Questions - Click On The Picture To Begin...
These Questions Are From The Illinois CDL Manual
- Trucks without trailers typically have more traction and drive better in adverse weather conditions
- It takes a truck with no trailer longer to stop than a tractor-trailer loaded to maximum gross weight
- A truck with no trailer will be very easy to control during an emergency stop
- A truck with no trailer attached will stop very quickly
Quote From Page 71 Of The CDL Manual:
You also must be very careful about driving "bobtail" tractors (tractors without semitrailers). Tests show that bobtails can be very hard to stop smoothly. It takes them longer to stop than a tractor-semitrailer loaded to maximum gross weight.
Driving a bobtail (truck with no trailer) can be very dangerous. Trucks were designed to have trailers attached so driving will be difficult when a trailer is not attached.
- When a combination vehicle makes a low-speed turn the wheels of the rearmost trailer axle follow a path several feet inside the path of the tractor steering axle.
- When a trailer's tandem axles are slightly out of alignment, the rear of the trailer will track off to one side or another instead of directly behind the tractor
- When making a high speed turn, the momentum carried by the trailer will cause it to swing wide and possibly outside the lane of travel
- When taking off from a dead stop, the initial torque of the engine on the drivetrain will cause a slight offtracking of the tractor which could be a hazard to other traffic
Quote From Page 0 Of The CDL Manual:
- None of these are allowed during the driving exam
- Resting your foot on the clutch pedal (riding the clutch)
- Shifting in turns
- "Floating" the gears (shifting without using the clutch pedal)
Quote From Page 131 Of The CDL Manual:
Clutch usage (for manual transmission):
- Always use the clutch to shift.
- Double-clutch if vehicle is equipped with non-synchronized transmission.
- Do not rev or lug the engine.
- Do not ride the clutch to control speed, coast with the clutch depressed, or "pop the clutch."
Gear usage (for manual transmission):
- Do not grind or clash gears.
- Select a gear that does not rev or lug engine.
- Do not shift in turns and intersections.
You are not expected to shift perfectly. You only need to prove you are safe and will not pose a hazard to the general public. However, there are some basic rules you must follow.
- Do not stall the truck! This may result in an immediate failure.
- You must shift the transmission using the clutch (they will check for this).
Grinding or clashing gears will NOT result in an automatic failure. But it's important for you to learn how to recover when missing a gear. If you lose too much speed or stall the truck, you may be forced to retest.
- None of these answers are correct
- Portable tanks are loaded or unloaded while off the vehicle and cargo tanks remain on the vehicle when you load and unload them
- Portable tanks and cargo tanks are the same and simply have two different names
- Portable tanks are loaded or unloaded while on the vehicle while cargo tanks are loaded or unloaded while off the vehicle
Quote From Page 100 Of The CDL Manual:
Cargo tanks are bulk packagings permanently attached to a vehicle. Cargo tanks remain on the vehicle when you load and unload them. Portable tanks are bulk containers not permanently attached to a vehicle. The product is loaded or unloaded while the portable tanks are off the vehicle. Portable tanks are then put on a vehicle for transportation. There are many types of cargo tanks in use. The most common cargo tanks are MC406 for liquids and MC331 for gases.
- Driving too fast for conditions
- Cargo loaded so not enough weight is on the front axle
- Too much tread on the front tires
- All of these are reasons for front-wheel skids
Quote From Page 44 Of The CDL Manual:
Front-Wheel Skids - Most front-wheel skids are caused by driving too fast for conditions. Other causes are lack of tread on the front tires, and cargo loaded so not enough weight is on the front axle. In a front-wheel skid, the front end tends to go in a straight line regardless of how much you turn the steering wheel. On a very slippery surface, you may not be able to steer around a curve or turn.
When a front-wheel skid occurs, the only way to stop the skid is to let the vehicle slow down. Stop turning and/or braking so hard. Slow down as quickly as possible without skidding.
- No more than 2 psi
- No more than 4 psi
- No more than 5 psi
- No more than 3 psi
Quote From Page 117 Of The CDL Manual:
With the engine running, build the air pressure to governed cut-out (100-125 psi). Shut off the engine, turn the electrical power on, chock your wheels, if necessary, release the tractor protection valve and parking brake (push in), fully apply the foot brake and hold it for one minute. Check the air gauge to see if the air pressure drops more than 3 pounds in 1 minute (single vehicle) or 4 pounds in 1 minute (combination vehicle) with brake applied. When brake is unapplied, air pressure drops more than 2 pounds in 1 minute with a single vehicle and 3 pounds in 1 minute in a combination vehicle.
Be sure to memorize how much air loss is acceptable when the service brakes are applied and not applied.
- A tapered or wedge-shaped piece used to secure round articles against rolling.
- A short piece of material, usually wood, nailed to the deck to reinforce blocking.
- A tapered piece of material, thick at one end and thin at the other.
- Part of the structure, fitting, or attachment on a vehicle or cargo to which a tiedown is attached.
Quote From Page 3 Of The CDL Manual:
A short piece of material, usually wood, nailed to the deck to reinforce blocking.
- Class 3 flammable liquids
- All of these have special cargo heater rules
- Class 5 oxidizers
- Class 6 poisonous materials
Quote From Page 96 Of The CDL Manual:
There are special cargo heater rules for loading:
- Class 1 explosives
- Division 2.1 flammable gas
- Class 3 flammable liquids
The rules usually forbid the use of cargo heaters, including automatic cargo heater/air conditioner units. Unless you have read all the related rules, do not load the above products in a cargo space that has a heater.
- Gear box
- Air compressor
- Tie rods
Quote From Page 14 Of The CDL Manual:
Things to check in the steering system:
- Missing nuts, bolts, cotter keys or other parts.
- Bent, loose or broken parts, such as steering column, steering gear box or tie rods.
- If power steering equipped-check hoses, pumps and fluid level for leaks.
- Steering wheel play of more than 10 degrees (approximately 2 inches movement at the rim of a 20-inch steering wheel) can make it hard to steer.
- Slow down by downshifting to avoid coasting
- Put the truck in neutral before using the brake pedal to slow down
- Put the truck in the highest possible gear before slowing down
- Keep the truck in gear and depress the clutch pedal before slowing down
Quote From Page 128 Of The CDL Manual:
As you approach the turn:
- Use turn signals to warn others of your turn.
- Slow down smoothly, change gears as needed to keep power, but do not coast unsafely. Unsafe coasting occurs when your vehicle is out of gear (clutch depressed or gearshift in neutral) for more than the length of your vehicle.
The examiners will check to make sure you're able to keep the truck in gear by using proper downshifting. Avoid taking the truck out of gear until absolutely necessary.