## Review Questions - Click On The Picture To Begin...

Based on the following figures, how much fuel can you legally add while remaining legal on the drive axles?

Percentage of fuel weight to drive axles: 30%

Weight Before Fueling: Steer: 11,275, drives: 33,750, gross: 77,220

Weight Before Fueling: Steer: 11,275, drives: 33,750, gross: 77,220

- 104.16 gallons of fuel
- 112.75 gallons of fuel
- 88.5 gallons of fuel
- 110 gallons of fuel

#### Quote From The CDL Manual:

Once you know your current axle weights and the percentage of fuel weight that goes on the drive axles, you can use this formula to calculate the amount of fuel you can take on:

#### TruckingTruth's Advice:

We know that 30% of the weight of fuel will go to the drive axles and you have 250 pounds you can add to the weight of the drive axles and remain legal. So plugging these numbers into the formula, you get:

250/30 = 8.33

8.33x100 = 833

833/8 = 104.13 gallons of fuel you can add

250/30 = 8.33

8.33x100 = 833

833/8 = 104.13 gallons of fuel you can add

Next

Based on the following figures, how much fuel can you legally add while remaining legal on the steer axle?

Load rating of steer tires: 6,150 pounds

Percentage of fuel weight to steer axle: 85%

Steer axle weight limit in states you're travelling: 20,000 pounds

Weight Before Fueling: Steer: 11,500, drives: 33,100, gross: 76,700

Percentage of fuel weight to steer axle: 85%

Steer axle weight limit in states you're travelling: 20,000 pounds

Weight Before Fueling: Steer: 11,500, drives: 33,100, gross: 76,700

- 110.75 gallons of fuel
- 133 gallons of fuel
- 129.5 gallons of fuel
- 117.64 gallons of fuel

#### Quote From The CDL Manual:

Once you know your current axle weights and the percentage of fuel weight that goes on the steer axle, you can use this formula you can calculate the amount of fuel you can take on:

#### TruckingTruth's Advice:

Because your steer tires are rated at 6,150 and the legal weight limit is 20,000 pounds for the steer axle in the states you're travelling in, the most restrictive law would be to not exceed the tire load rating. In this case, you can have 12,300 on your steer axle. Right now you have 11,500 on your steer axle, which means you can add 800 pounds to your steer axle and still be legal.

Because we know that 85% of the weight of fuel will go to the steer axle and you can add 850 pounds to your steer axle, we can plug the numbers into the formula above.

800/85 = 9.41

9.41 x 100 = 941

941/8 = 117.63 gallons of fuel you can add

Because we know that 85% of the weight of fuel will go to the steer axle and you can add 850 pounds to your steer axle, we can plug the numbers into the formula above.

800/85 = 9.41

9.41 x 100 = 941

941/8 = 117.63 gallons of fuel you can add

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Next

Based on the following figures, how much fuel can you legally add while remaining legal on the drive axles?

Percentage of fuel weight to drive axles: 25%

Weight Before Fueling: Steer: 11,275, drives: 33,800, gross: 77,420

Weight Before Fueling: Steer: 11,275, drives: 33,800, gross: 77,420

- 100 gallons of fuel
- 108.8 gallons of fuel
- 122 gallons of fuel
- 119.75 gallons of fuel

#### Quote From The CDL Manual:

Once you know your current axle weights and the percentage of fuel weight that goes on the drive axles, you can use this formula to calculate the amount of fuel you can take on:

#### TruckingTruth's Advice:

We know that 25% of the weight of fuel will go to the drive axles and you have 200 pounds you can add to the weight of the drive axles and remain legal. So plugging these numbers into the formula, you get:

200/25 = 8

8x100 = 800

800/8 = 100 gallons of fuel you can add

200/25 = 8

8x100 = 800

800/8 = 100 gallons of fuel you can add

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Next

Based on the following figures, how much fuel can you legally add while remaining legal on the steer axle?

Load rating of steer tires: 6,150 pounds

Percentage of fuel weight to steer axle: 80%

Steer axle weight limit in states you're travelling: 20,000 pounds

Weight Before Fueling: Steer: 11,450, drives: 33,100, gross: 76,700

Percentage of fuel weight to steer axle: 80%

Steer axle weight limit in states you're travelling: 20,000 pounds

Weight Before Fueling: Steer: 11,450, drives: 33,100, gross: 76,700

- 121.25 gallons
- 119.5 gallons
- 132.81 gallons
- 146 gallons

#### Quote From The CDL Manual:

Once you know your current axle weights and the percentage of fuel weight that goes on the steer axle, you can use this formula you can calculate the amount of fuel you can take on:

#### TruckingTruth's Advice:

Because your steer tires are rated at 6,150 and the legal weight limit is 20,000 pounds for the steer axle in the states you're travelling in, the most restrictive law would be to not exceed the tire load rating. In this case, you can have 12,300 on your steer axle. Right now you have 11,450 on your steer axle, which means you can add 850 pounds to your steer axle and still be legal.

Because we know that 80% of the weight of fuel will go to the steer axle and you can add 850 pounds to your steer axle, we can plug the numbers into the formula above.

850/80 = 10.62

10.62 x 100 = 1062

1062/8 = 132.75 gallons of fuel you can add

Because we know that 80% of the weight of fuel will go to the steer axle and you can add 850 pounds to your steer axle, we can plug the numbers into the formula above.

850/80 = 10.62

10.62 x 100 = 1062

1062/8 = 132.75 gallons of fuel you can add

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