Review Questions - Click On The Picture To Begin...
These Questions Are From The Illinois CDL Manual
- 1/8 second
- 1 second
- 1-3/4 second
- 1/2 second
Quote From Page 29 Of The CDL Manual:
The average perception time for an alert driver is 1 3/4 seconds. At 55 mhp this accounts for 142 feet travelled.
Perception time and distance must be memorized.
- Bring your vehicle to a full stop without coasting
- Decelerate quickly without changing gears
- Place the transmission in neutral before braking
- Leave the truck in gear, but depress the clutch pedal to avoid stalling while slowing down
Quote From Page 129 Of The CDL Manual:
As you prepare for the stop:
- Check traffic.
- Activate your right turn signal.
- Decelerate smoothly, brake evenly, change gears as necessary.
- Bring your vehicle to a full stop without coasting.
Always slow down smoothly and use downshifting to slow the vehicle. You never want to be out of gear or leave the clutch pedal depressed while slowing down.
- Extremely dangerous poisonous (toxic) liquid
- Poisonous (toxic) gas
- Small-arms ammunition
Quote From Page 56 Of The CDL Manual:
Buses may carry small-arms ammunition, emergency shipments of drugs, chemicals and hospital supplies. You can carry small amounts of some other hazardous materials if the shipper cannot send them any other way. Buses must never carry:
- Division 2.3 POISONOUS (Toxic) GAS.
- Division 6.1 EXTREMELY DANGEROUS POISONOUS (Toxic) LIQUID.
- More than 45 kg (100 pounds) of a solid Division 6.1 Poison.
- More than 225 kg (500 pounds) total of allowable hazardous materials and no more than 45 kg (100 pounds) of any one class.
Even if you don't plan to obtain a passenger endorsement for your CDL, you will still be required to have a basic understanding of some general rules and regulations for transporting passengers.
- When both front tires return to a paved surface, hesitate about 1/2 second before counter-steering
- Hold the wheel tightly and turn sharply enough to get right back on the road
- Only return one side of the vehicles tires to the roadway and wait for them to "grab" the surface before going further
- Pull back onto the roadway as slowly and gradually as possible
Quote From Page 42 Of The CDL Manual:
If you are forced to return to the road before you can stop, use the following procedures:
- Hold the wheel tightly and turn sharply enough to get right back on the road safely. Do not try to edge gradually back on the road. If you do, your tires might grab unexpectedly and you could lose control.
- When both front tires are on the paved surface, countersteer immediately. The two turns should be made as a single "steer-countersteer" move.
- Doubles/triples are easier to handle in windy conditions than single trailer vehicles
- Doubles/triples don't jackknife as easily as single trailer vehicles
- Doubles/triples are less prone to rollovers than single trailer vehicles
- Doubles/triples are less stable than other commercial vehicles
Quote From Page 80 Of The CDL Manual:
Take special care when pulling two and three trailers. There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. Some areas of concern are discussed below.
Pulling doubles or triples are much more dangerous in nearly every aspect of driving, which is why they require an additional endorsement. Be extra cautious when driving a truck with two or more trailers.
- Synthetic webbing.
- Wire rope.
- Containment walls.
Quote From Page 11 Of The CDL Manual:
Transport flattened or crushed vehicles so that:
- Cargo does not shift while in transit AND
- Loose parts from the flattened vehicles do not dislodge and fall from the transport vehicle
Do not use synthetic webbing to secure vehicles.
- Perception Distance
- Reaction Distance
- Total Stopping Distance
- Braking Distance
Quote From Page 29 Of The CDL Manual:
Braking Distance is the distance it takes to stop once the brakes are applied. At 55 mph on dry pavement with good brakes, it can take a heavy vehicle about 216 feet to stop.
Remember, braking distance is only one of three parts of the total stopping distance formula. Be sure to memorize the entire stopping distance formula:
+ Reaction Distance
+ Braking Distance
= Total Stopping Distance
- Stop the vehicle, put the parking brake on, and pull against it in the highest gear
- Idle the vehicle in the lowest gear possible then apply the parking brake and be sure the vehicle comes to a complete stop
- Stop the vehicle, put the parking brake on, and gently pull against it in a low gear to test that the parking brake will hold
- Place chocks against the tires of the truck, release the parking brake, then visually inspect each parking brake
Quote From Page 67 Of The CDL Manual:
Test parking brake: Stop the vehicle, put the parking brake on, and gently pull against it in a low gear to test that the parking brake will hold.
- 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.
- Engage and disengage the parking brake repeatedly until the trailer air supply control pops out
- On double and triple trailers, the tractor protection valve will not work
- Chock the wheels, release all brakes, then go to the last trailer and open the shut off valve to release as much air from the system as possible to see if the trailer air supply control pops out
- Step on and off the brake pedal several times to reduce the air pressure in the tanks until the trailer air supply control pops out
Quote From Page 83 Of The CDL Manual:
Test tractor protection valve: Charge the trailer air brake system, (i.e., build up normal air pressure and push the "air supply" knob in). Shut the engine off. Step on and off the brake pedal several times to reduce the air pressure in the tanks. The trailer air supply control (also called the tractor protection valve control) should pop out (or go from "normal" to "emergency" position) when the air pressure falls into the pressure range specified by the manufacturer (usually within the range of 20 to 45 psi).