Instructions

Tank

This endorsement is required to haul any liquid or gaseous materials in a tank or tanks having a capacity of 1,000 gallons or more that is either permanently or temporarily attached to the vehicle or chassis. To receive this endorsement, applicants must pass a test. The test consists of 20 multiple choice questions. Each question has four possible answer choices. To pass, the applicant must answer at least 16 questions correctly. Test questions come from the Washington D.C. Commercial Driver License Manual. Questions come from chapters covering: Driving Safely, Tank Vehicles, Hazardous Materials and Combination Vehicles. The Tank endorsement can be used with the Class A, B or C CDL.

Number of Question 20

Passing Score 16

1. When driving a bobtail tractor, you should be aware that:

Bobtails stop very easily.

Bobtails cannot drive as fast as tractors with semitrailers.

Bobtails are more difficult to stop than tractors with semitrailers.

Bobtails are illegal in most states.

Bobtail tractors are tractors that are not attached to any semitrailers. When operating a bobtail, you should be aware that stopping can be difficult and that it will take a longer distance to bring the bobtail to a complete stop than it would a tractor attached to a loaded semitrailer.

2. How many seconds of following distance per every 10 feet of vehicle should you maintain when traveling more slowly than 40 mph?

One second

Two seconds

Three seconds

Four seconds

When traveling at speeds below 40 mph, you should maintain at least one second of following distance for every 10 feet of your vehicle's length. At higher speeds, add an additional second.

3. What should you do if your vehicle gets stuck on railroad tracks?

Stay in the vehicle.

Get out of the vehicle and call for assistance.

Continue trying to remove the vehicle from the tracks.

Walk down the tracks to look for an oncoming train.

If your vehicle gets stuck on railroad tracks for any reason, you should immediately exit the vehicle and walk away from the tracks. Contact the proper emergency authorities.

4. When checking the engine compartment:

The parking brake should not be engaged.

Wheels should be chocked.

The engine should be running.

The gearshift should be in first gear.

Before inspecting the engine compartment, make sure that the parking brakes are on and/or the wheels are chocked. Check the engine compartment before entering the cab and starting the engine.

5. Who must provide emergency response information?

The shipper

The driver

The local fire department

The Department of Homeland Security

Shippers of hazardous materials are required to provide emergency response information to drivers.

6. A driver should always:

Stay in their lane.

Have an emergency plan.

Stay in the left lane.

Drive above the speed limit.

While driving, you should continually scan the road ahead to spot potential hazards well in advance. Make emergency plans for how to deal with the hazards in the event that they become dangerous.

7. Roads are slippery when it first begins to rain because:

Water is slippery.

The fresh rain mixes with oil on the roadway.

The water has nowhere to go.

Concrete can be slippery.

Roads are especially slippery when it first begins to rain. Rain water initially mixes with oil and grease on the road to form a slippery film. As the rain continues, this mixture will eventually wash away.

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