CDL Practice Test: Weight & Balance

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CDL Practice Test: Weight & Balance

Weight & Balance Questions

Click On The Picture To Begin

Good Luck!

Ideally, where would you like the cargo's center of gravity located?
  • Centered between your drive axles and your trailer tandems.
  • Just slightly behind the tractor's drive axles
  • Roughly centered between the steer axle and the trailer tandems
  • About 10 feet to the rear the center point of the trailer
This is a question from page 114 - click here to look up the answer

Quote From Page 0 Of The Illinois CDL Manual:

You'll want to have the cargo loaded into the trailer so that the center of gravity is centered between your drive axles and your trailer tandems.

TruckingTruth's Advice:

If the center of gravity of the cargo is too far to the front or rear of the vehicle, it is entirely possible that you will not be able to get your axle weights legal without reloading the cargo itself.
Next
In Oregon, the maximum weight on the steer axle is listed as 600 pounds per inch of tire tread width up to 20,000 pounds. Your steer tires have a load rating of 6,150 pounds each and are 10 inches wide. What is the maximum legal weight your steer axle can carry in Oregon?
  • 15,500 pounds
  • 12,000 pounds
  • 20,000 pounds
  • 12,300 pounds
This is a question from page 112 - click here to look up the answer

Quote From Page 0 Of The Illinois CDL Manual:

Kentucky has a limit of 700 pounds per inch of tread width. So if you have a 10 inch wide tire tread, you are allowed a maximum of 7,000 pounds per tire (700 pounds per inch x 10 inches wide) or 14,000 pounds total for the steer axle.

TruckingTruth's Advice:

You must find the most restrictive law to determine your maximum legal weight.

The maximum Oregon allows is 20,000 pounds on the steer axle

The load rating on your tires is 6,150, which would put your maximum legal weight at 12,300 pounds regardless of the fact that there are less restrictive laws.

The maximum Oregon allows by weight is 600 pounds per inch. You have 10 inch tires so that would be a maximum of 6000 pounds per tire, or 12,000 pounds on the steer axle, which is the most restrictive of the various laws. Therefore, 12,000 pounds is your legal limit in this truck in Oregon.

Prev
Next
In the following picture, what are axles 4 and 5 commonly referred to as?
  • "trailer drives" or "back tandems"
  • "tandems" or "trailer tandems"
  • "back set" or "rear tandems"
  • "trailer set" or "back tandems"
This is a question from page 110 - click here to look up the answer

Quote From Page 0 Of The Illinois CDL Manual:

#4 and #5 together are your trailer tandem axles (commonly referred to as "tandems" or "trailer tandems")

TruckingTruth's Advice:

You'll generally hear drivers refer to these axles as simply "tandems". They'll say "The load I had yesterday was loaded incorrectly and I was overweight on my 'tandems' ".
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Next
Sliding your 5th wheel will redistribute the weight mainly between which two sets of axles?
  • Drive axles and trailer tandems
  • Steer axle and trailer tandems
  • Trailer tandems and rear axles
  • Steer axle and drive axles
This is a question from page 110 - click here to look up the answer

Quote From Page 0 Of The Illinois CDL Manual:

Sliding your 5th wheel will redistribute the weight mainly between your steer axle and your drive axles

TruckingTruth's Advice:

Sliding the 5th wheel will generally have little or no effect on the weight of your trailer tandems
Prev
Next
Sliding your trailer tandems toward the front or back of the vehicle will primarily change the weight distribution between which sets of axles?
  • The steer axle and the trailer tandems
  • The tractor's drive axles and the steer axle
  • The tractor's drive axles and the trailer tandems.
  • It only removes weight from the trailer tandems
This is a question from page 113 - click here to look up the answer

Quote From Page 0 Of The Illinois CDL Manual:

Sliding your trailer tandems toward the front or back of the vehicle will primarily change the weight distribution between the tractor's drive axles and the trailer tandems.
Prev
Next
You're in Illinois which allows up to 20,000 pounds on the steer axle. You're heading to Indiana which only allows 12,000 on the steer axle. Your steer tires have a load rating of 6,500 pounds each. What is the maximum legal weight your steer axle can be for each of the two states?
  • 13,000 pounds in Illinois
    12,000 pounds in Indiana
  • 20,000 pounds in Illinois
    12,000 pounds in Indiana
  • 13,000 pounds in Illinois
    13,000 pounds in Indiana
  • 20,000 pounds in Illinois
    13,000 pounds in Indiana
This is a question from page 112 - click here to look up the answer

Quote From Page 0 Of The Illinois CDL Manual:

Keep in mind though - even if they allow 14,000 pounds on the steer axle, you have to have tires that are rated to carry that much weight. If your steer tires have a tire load limit of 6,000 pounds each, you can only carry 12,000 pounds on your steer axle, regardless of state laws.

TruckingTruth's Advice:

We have to find the most restrictive law for each state.

Illinois

Allows 20,000 pounds on the steer axle

Your tire load rating of 6,500 means your maximum legal weight is 13,000 pounds on the steer axle.

The 13,000 pounds is the most restrictive for Illinois

Indiana

Indiana allows 12,000 on the steer axle

Your tire load rating of 6,500 means your maximum legal weight is 13,000 pounds on the steer axle.

The 12,000 pound limit imposed by Indiana on the steer axle is the most restrictive for Indiana

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Next
What is the maximum legal weight for the drive axles or trailer tandems?
  • 34,000 pounds
  • 26,000 pounds
  • 12,000 pounds
  • 20,000 pounds
This is a question from page 112 - click here to look up the answer

Quote From Page 0 Of The Illinois CDL Manual:

The legal weight limits for each set of axles is:

  • Steer axle varies by state
  • 34,000 for the drive axles
  • 34,000 for the trailer tandems
Prev
Next
If you slide the 5th wheel toward the nose of the tractor, what will be the effect?
  • You will increase the weight on the steer axle and take weight off the drive axles
  • You will decrease the weight on the steer axle and it will have no effect on the drive axles
  • You will decrease the weight on the steer axle and take weight off the drive axles
  • You will increase the weight on the steer axle and increase the weight on the drive axles
This is a question from page 118 - click here to look up the answer

Quote From Page 0 Of The Illinois CDL Manual:

If you slide the 5th wheel toward the nose of the tractor you will increase the weight on the steer axle and take weight off the drive axles.
Prev
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