Nebraska CDL DMV Knowledge Test Class A 2

During a pre-trip inspection, you should verify that the air pressure is neither too low nor too high in any of your tires.

An air brake system's safety relief valve is located in the tank that is first to receive air from the compressor.

In conditions of poor visibility (such as at dawn, at dusk, in rain, or in snow), you should turn on your low beam headlights to make your vehicle easier to see. Do not use your high beams when driving near other vehicles.

Check your tires regularly when looking in your mirrors. This helps ensure that you will notice a tire fire, if one should happen. Tire fires may occur when a tire is under-inflated, if dual tires are touching, or if the tires are otherwise overheated.

Always accelerate smoothly and gradually so that your vehicle does not jerk. Rough acceleration can cause mechanical damage.

If you must stop on or by a one-way or divided highway, you must place a warning device 10 feet, 100 feet, and 200 feet to the rear of your vehicle.

Improperly secured or loaded cargo can be very dangerous. For example, loose cargo could fall in the event of a sudden stop, potentially injuring or even killing the driver.

To ensure that you can see as well as possible, don't wear sunglasses when driving at night. If you wear eyeglasses, make sure they are clean and unscratched. Make sure you are rested and alert before driving at night.

A visual low pressure warning signal should activate before air pressure drops to a level between 55 and 75 psi. This signal could be a light, a buzzer, or a wig wag.

Because air expands when hot, tire pressure increases as temperatures increase. This can sometimes result in tire failure. Consistently check your tire pressure when making a trip in hot weather.

Air expands as it gets warmer, so the air pressure in your tires could reach dangerously high levels while being driven in very hot weather. If this happens, stop and let your tires cool. Do not let air out of the tires, as this could result in the pressure dropping to an unsafe level once they cool down.

Being properly rested is essential to the safe operation of a CMV. To maintain alertness, most people need eight to nine hours of sleep per night.

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.

Roads are often especially slippery when it first begins to rain. Rainwater forms a slick film when mixed with oil and grease on the road surface that has not yet washed away.

When exiting your vehicle during the basic vehicle control skills test, you must face the vehicle and maintain three points of contact at all times. If your testing vehicle is a bus, you must maintain contact with the handrail. Exiting the vehicle incorrectly may result in automatic failure of the basic control skills test.

Part of your vehicle should be visible in your mirrors so that you have a point of reference when judging how close other drivers and objects are to your vehicle.

A vehicle will be slowed down by gravity on any uphill grade. You may need to switch to a lower gear to climb a steep grade.

Be careful around pedestrians, joggers, and cyclists who are wearing headphones. They may not be able to clearly hear surrounding traffic and may not be aware that you are there.

If being shipped on a flatbed trailer or on a trailer without sides, cargo must be securely tied down to keep it from shifting or falling off while the vehicle moves.

Wheels or rims that have had welding repairs are not safe for use. They should be replaced before the vehicle is taken on the road.

If you must drive in reverse, you should back up slowly and use the mirrors on both sides of your vehicle. Use a helper to monitor your blind spots whenever possible. You and the helper should agree on a signal for "stop."

You must notify your employer within two business days if your license is suspended, revoked, or canceled, or if you are otherwise disqualified from driving.

During the pre-trip vehicle inspection test, you will be asked to indicate where the dipstick is located. You will need to show that the oil level is within a safe operating range and above the refill mark.

You may be tailgated when you can't drive fast enough to keep up with other traffic. If a heavy load is slowing you down, stay in the right lane, if possible.

Brakes are particularly prone to getting out out adjustment if they are hot. Use proper braking techniques to avoid letting your brakes overheat.

Any foreign object on the road is potentially dangerous. For example, something seemingly harmless, such as a cardboard box or paper sack, could contain a hard or heavy object that could do serious damage to a vehicle.

It is prohibited for CMV drivers to use hand-held mobile phones while driving.

The suspension system holds up the vehicle and its load while keeping the axles in place. Damage to a suspension system can be very dangerous.

Use your low beam headlights when traveling near other drivers at times when it is difficult to see, such as at dawn, at dusk, or in poor weather conditions. Using the high beam setting under certain conditions could make it difficult for other drivers to see.

Tires need to have at least 4/32 of an inch of tread depth in every major groove on the front tires, and at least 2/32 of an inch of tread depth on other tires.

You should always make sure that your vehicle will be able to stop within the area of the road that you are able to see. This means that you must slow down whenever conditions reduce visibility.

It is important for you to be aware of your surroundings at all times. To do this, regularly check your mirrors.

A cargo van carrying a light load will not sit as low as it will when carrying a heavy load. The van will require more room overhead when carrying light cargo.

Backing a commercial motor vehicle is always dangerous because you cannot see everything behind you. When backing, make frequent checks of the mirrors on both sides of the vehicle. Use a helper whenever possible.

Signal well in advance of a turn so drivers behind you are aware of your intentions. Keep the signal on throughout the turn and turn it off once the turn is complete.