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California CDL DMV Endorsement Tank 2

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1. When coupling, after you've connected the air lines to the trailer, you should:
Supply air to the trailer.
Activate the emergency brake.
Disconnect the glad hands.

Correctly following the steps to couple and uncouple trailers is vital to safely operating a combination vehicle. After connecting the air lines to the trailer while coupling, you should supply air to the trailer.

2. The weight of a truck:
Usually has no impact on stopping distance.
Is a major factor affecting stopping distance.
Is not as important as the type of cargo in determining stopping distance.

A vehicle's weight is an important factor affecting its stopping distance. The heavier a vehicle is, the more work the brakes will need to do to bring it to a complete stop.

3. After coupling, there should be ____ between the upper and lower fifth wheel.
No space
Very little space
A lot of space
Three inches of space

Before a trip, be sure to inspect all couplings. There should be no space between the upper and lower fifth wheel.

4. In a sudden turn, the ____ trailer is the most likely to turn over.

When making a turn, be sure to steer gently and smoothly. Making a quick turn while pulling trailers is dangerous and can increase the risk of the last trailer rolling over.

5. A driver operating a tank equipped with baffles should be particularly wary of:
Front-to-back surge.
Side-to-side surge.
End-to-end surge.

While baffles in a tank inhibit forward and backward surge, they do not prevent side-to-side surge. Surge to the sides can cause rollovers.

6. Roads are especially slippery when it first begins to rain because:
Water is always very slippery.
The fresh rain mixes with oil on the roadway.
The water has nowhere to go.

Roads are particularly slippery when it first begins to rain. The water mixes with oil drippings on the road that have not yet washed away, creating a slippery and dangerous mixture.

7. Before a trip, you can make sure air flows to all trailers by:
Checking for moving air inside of each trailer.
Listening for air at the rear shut-off valve.
Feeling for air at the front shut-off valve.

Before a trip, ensure that air in the air brake system reaches all trailers. Do this by waiting for air pressure to build, then sending air to both the emergency and service lines and opening the shut-off valves on the rear of the last trailer. If air escapes from the shut-off valves in the rear of the combination, the air is being supplied to the entire vehicle.

8. Your engine runs a pump used during the delivery of compressed gas. After delivery, you should turn off the engine ____ unhooking the hoses.
Either before or after

Unless your engine runs a pump for product transfer, turn it off when loading or unloading a compressed gas tank. If you do use your engine to run a pump, you should turn the engine off after the product transfer but before unhooking the hoses.

9. When traveling down a hill, you can reduce the amount of required braking by:
Switching into a higher gear.
Switching into a lower gear.
Switching into neutral.

Before starting down a hill, decelerate and shift down into a gear that will allow you to control your vehicle without braking too hard. Using too much brake when driving downhill can cause the brakes to overheat, reducing the braking power.

10. When driving under wet conditions, a lack of spray coming from the tires of other vehicles indicates that:
Ice has formed on the road.
The pavement is dry.
The spray is caught on the underside of the vehicle.

In wet conditions, a lack of spray coming from the tires of other vehicles indicates that ice has formed on the road. Be especially cautious when traveling under wet conditions in freezing weather.

11. A Class 1 hazardous material is:
An explosive.

The first hazardous materials class includes explosives such as ammunition, dynamite, and fireworks.

12. When carrying Division 1.1, 1.2, or 1.3 explosives, your vehicle should not be:
Parked within 300 feet of a bridge.
Parked within 40 feet of the road.
Driven in rain or snow.

Except when parking briefly to perform necessary functions for vehicle operation (such as refueling), never park a vehicle carrying Division 1.1, 1.2, or 1.3 explosives within 300 feet of a bridge, tunnel, or building. Never park such a vehicle within five feet of the traveled portion of the road.

13. You are especially likely to encounter strong winds when:
Coming out of tunnels.
Going into tunnels.
Driving on shoulders.

Strong winds can make it difficult to keep a vehicle in its proper lane. Strong wind can be a particular problem when a vehicle is being driven out of a tunnel.

14. If a spill occurs from a tank vehicle you are operating:
You may have to pay for clean-up efforts.
You will be exempt from clean-up costs if the tank was loaded by another person or company.
You will be required to notify the local conservation department.

It is illegal to transport liquids or gases in a leaking tank. If you do drive a leaking tank, you may be liable for the costs of cleaning up the spilled material.

15. Of the following, which is the most slippery surface?
Ice that is dry
Ice that is wet
Wet pavement

Ice becomes wet when the weather is just warm enough to melt the ice slightly. Wet ice is much more slippery than ice that is not wet.

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