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 Colorado 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. A person working on a disabled vehicle on the shoulder of a road:

Will likely pay attention to traffic on the road.

May be focused on the repair and not paying attention to roadway traffic.

Is exempt from traffic laws.

Should not be assisted.

Be cautious when driving near people who are working on disabled vehicles. The task will likely consume their attention, so they may not be aware of traffic or other hazards on the road.

2. After finishing a pre-trip inspection, you should:

Leave the rear shut-off valves open.

Remove the service line valve.

Close the emergency line valve.

Leave the emergency line valve open.

Before a trip, you should ensure that air reaches all air brakes on all trailers by opening up the rear emergency line and service line shut-off valves to listen for escaping air. Close both shut-off valves before beginning to drive.

3. During a pre-trip inspection, what is the best method for checking your lights?

Parking near a mirror to look for a reflection

Activating the lights, then exiting the vehicle to check

Looking on the instrument panel to see if any warning lights are illuminated

Driving in traffic and waiting for other drivers to let you know your lights are out

During a pre-trip inspection, you should activate your lights, then get out of the vehicle to look at them.

4. The amount of liquid cargo being loaded into a tank should depend on:

The speed limits on the route.

Legal weight limits.

The color of the cargo.

The length of the trip.

Factors that affect how much liquid is safe to load into your tank include how much the liquid will expand in transit, the weight of the liquid, and legal weight limits. If you are loading a particularly dense liquid, take special care to ensure that you do not exceed legal weight limits.

5. Carrying liquid cargo:

Is easier than carrying solid cargo.

Is more difficult than carrying solid cargo.

Is illegal.

Is not permitted during normal business hours.

Hauling liquids in a tank requires special skill. Due to the danger of liquid surge, carrying liquid cargo is more difficult than carrying solid cargo.

6. When backing a truck, you should:

Only use the side mirrors on the driver’s side.

Use both side mirrors.

Not use a helper.

Only use the mirror on the passenger's side.

To remain aware of hazards behind your vehicle when backing, you should frequently check your mirrors on both sides of the vehicle. Have a helper watch your blind spots whenever possible.

7. Before backing your tractor under the trailer, make sure your trailer brakes are:

Disengaged.

Locked.

Deactivated.

Dry.

Correctly following the steps to couple and uncouple trailers is vital to safely operating a combination vehicle. Before backing your tractor under the trailer while coupling, make sure your trailer brakes are locked.

Grade This Section