- No more than 3 psi
- No more than 2 psi
- No more than 1 psi
- No more than 4 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.
TruckingTruth's Advice:
Be sure to memorize how much air loss is acceptable when the service brakes are applied and not applied.
- 2
- Depends on the weight of the cargo.
- 1
- 0
Quote From Page 4 Of The CDL Manual:
Requirements for Securement System:
- In proper working order with no damaged or weakened components that affect their performance or reduce their working load limit.
- No knots.
- Attached and secured in a manner that prevents them from coming loose during transit.
- Able to be tightened by a driver of an in-transit vehicle.
- Located inboard of rub rails whenever practicable.
- Edge protection must be used when a tiedown would be subject to abrasion or cutting.
- The position of the heaviest trailer is not important as long as the brakes are working properly
- The heaviest trailer should be the very last trailer
- If there are three trailers, the heaviest should be in the middle
- The heaviest trailer should be in first position behind the tractor
Quote From Page 80 Of The CDL Manual:
For the safest handling on the road, the more heavily loaded semi-trailer should be in first position behind the tractor. The lighter trailer should be in the rear.
- Turn them so only their corners are touching.
- Lean them against each other.
- Lean them to the outside.
- Place them in direct contact with each other.
Quote From Page 4 Of The CDL Manual:
Choose one of two options for positioning bundles:
-
Option #1:
Place bundles in direct contact with each other.
-
Option #2:
Provide a means (such as dunnage or blocking) to prevent the bundles from shifting towards each other.
- 850 pounds of fuel
- 800 pounds of fuel
- 480 pounds of fuel
- 600 pounds of fuel
Quote From Page 0 Of The CDL Manual:
Number of miles travelled / miles per gallon = gallons of fuel burned off
TruckingTruth's Advice:
100 gallons x 8 pounds per gallon = 800 pounds of fuel burned off
- Back the tractor to the trailer at a 45 degree angle on either the left or right side
- Back the tractor to the trailer on the left side
- Back the tractor directly in front of the trailer
- Back the tractor to the trailer on the right side
Quote From Page 75 Of The CDL Manual:
- Put the tractor directly in front of the trailer. (Never back under the trailer at an angle because you might push the trailer sideways and break the landing gear.)
- Check position, using outside mirrors, by looking down both sides of the trailer.
TruckingTruth's Advice:
It will take some practice, but always back under a trailer as straight as possible to avoid turning the trailer over.
- Front, rear, both sides, roof, and underneath the vehicle
- Rear and both sides of the vehicle
- Front, rear, and both sides of the vehicle
- Front and rear of the vehicle
Quote From Page 49 Of The CDL Manual:
Placards are used to warn others of hazardous materials. Placards are signs put on the outside of a vehicle that identify the hazard class of the cargo. A placarded vehicle must have at least four identical placards. They are put on the front, rear and both sides. Placards must be readable from all four directions. They are 10 3/4-inches square, turned upright on a point, in a diamond shape. Cargo tanks and other bulk packaging display the ID number of their contents on placards or orange panels.
TruckingTruth's Advice:
Even if you are not planning on obtaining your hazardous materials endorsement, some various general knowledge questions will be asked about hazardous cargo.
- 50% forward, 20% rearward, 50% sideways, 20% upwards.
- 80% forward, 50% rearward, 80% sideways, 20% upwards.
- 80% forward, 50% rearward, 50% sideways, 20% upwards.
- 50% forward, 50% rearward, 50% sideways, 80% upwards.
Quote From Page 2 Of The CDL Manual:
How strong must the vehicle structure and anchor points be?
All elements of the vehicle structure and anchor points must be strong enough to withstand the forces described on page 7.
- Forward force: 0.8 g (80%)
- Rearward force: 0.5.g (50%)
- Sideways force: 0.5 g (50%)
- Upward force: 0.2 g (20%)
- These are all valid methods.
- Employing blocking equipment.
- Placing bundles against the bulkhead or front end.
- Using tiedowns.
Quote From Page 4 Of The CDL Manual:
-
Option #1
Place bundles against bulkhead/front end structure.
-
Option #2
When different tiers need to be secured, use a combination of blocking equipment and tiedowns.
- The cap is tight
- All of these answers are correct
- The tank is properly mounted and secure
- There are no leaks from the tanks or the lines
Quote From Page 119 Of The CDL Manual:
Fuel tank(s): Check that the tank(s) is secure, cap(s) is tight, and that there are no leaks from tank(s) or lines.
TruckingTruth's Advice:
When checking the fuel tank, tell the examiner:
"The tank must be properly mounted and secure, the cap must be on tight and not leaking, and there are should be no leaks under the tank."


) to help you understand the materials better and gain an understanding for how that knowledge will fit into the overall picture.
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