Oregon CDL DMV Knowledge Test Class B 2

Rust around wheel nuts may mean that they are loose. Check the tightness of the nuts if you see any rust in the area.

You should be cautious when you are near people who are not paying attention to the road. Drivers and pedestrians who are talking to someone may be distracted by the conversation and not fully paying attention to the road. Workers on or near the road may not be paying attention to traffic because they are focused on their work, and can themselves also be a distraction to drivers.

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.

To reduce the risk of a vehicle tipping over, the weight of cargo should be distributed as low as possible.

Cargo on flatbed trailers or trailers without sides must be tied down to prevent it from shifting or falling in transit.

For safe driving, it is essential that you are aware of what is happening on all sides of your vehicle. In addition to watching the road ahead, you should frequently check your mirrors to monitor the road to the sides and to the rear of your vehicle.

Commercial vehicle weight, securement of cargo, covering of loads, and where large vehicles can be driven are all regulated by federal, state, and local laws. These vary from place to place, so you must be aware of the rules that apply where you will be driving. State laws in the state in which you are driving take precedence.

When inspecting your vehicle, you should check all belts for tightness and excessive wear. You should learn how much "give" is appropriate for each belt.

After changing a tire, you should stop a short distance later to recheck the tightness of the tire's lug nuts.

You should never assume that you will hear an approaching train. The train operator may fail to sound the horn, or the use of a train's horn may be prohibited in a specific area. Even if the train does sound its horn, noise from inside your own vehicle may prevent you from hearing the train until it is dangerously close.

If the weight of your vehicle prevents you from matching the speed of surrounding traffic, you should stay in the right lane, if possible.

Hold the steering wheel firmly with both hands, placing them on opposite sides of the wheel.

During the CDL vehicle inspection test, you must be able to inspect your vehicle and explain to the examiner what you are inspecting and why.

If you need to make an emergency stop, you can use either the controlled braking method or the stab braking method. It's important to brake in a way that keeps your vehicle in a straight line but will still allow you to turn if necessary.

Livestock being transported as cargo can move around and shift their weight in transit, which can result in unsafe handling.

Compressed air in an air brake system usually contains a certain amount of water and compressor oil. The water and oil can damage the brakes if left to accumulate in the system. Manually operated air tank drains must be opened daily to remove this build-up.

While speaking on a hands-free phone while driving is less dangerous than speaking on a hand-held phone, it is just as likely to mentally distract a driver. Simply engaging in conversation takes their mental focus away from the task of driving.

B and C type fire extinguishers are designed to work on electrical fires. Water should never be used to extinguish an electrical fire because doing so could result in an electrical shock.

In an air brake system, the air tanks are equipped with drains that allow water and compressor oil to be removed from the system. If allowed to build up, water and compressor oil can damage an air brake system.

During a pre-trip inspection, be sure to check the mirrors and windshield for dirt and anything else that could interfere with your ability to see. Clean them as necessary.

B:C fire extinguishers are designed to work on electrical fires and burning liquids. Don't pour water on an electrical fire.

A faulty exhaust system is a serious safety hazard. It may allow poisonous fumes to enter the vehicle's cab or sleeper berth.

If equipped, ABS is in addition to a vehicle's normal braking system and does not increase or decrease the braking power of any other system. ABS only activates when a vehicle's wheels are about to lock.

All trucks, truck tractors, and buses must be equipped with emergency brakes and parking brakes. These brakes must be held by mechanical force.

After a vehicle's engine is started, the engine's oil pressure should rise to its normal level within seconds. Do not drive a vehicle with oil pressure that is too low.

When a vehicle is traveling on a downward slope, the force of gravity will cause its speed to increase.

A steering wheel should be held firmly with both hands, placed on opposite sides of the wheel.

In general, if you operate a commercial vehicle in interstate commerce, it must be registered under the International Registration Plan (IRP) and International Fuel Tax Agreement (IFTA). These programs collect and distribute vehicle registration fees and fuel taxes based on what jurisdictions you drive in and for how long. Mileage and fuel records supporting IFTA quarterly fuel tax returns must be retained by carriers for four years.

Driving with a dry bulk tank requires special care, both because dry bulk tanks have high centers of gravity and because their loads often shift in transit. Be especially careful when taking turns and curves while operating such a vehicle.

Good drivers scan the road at least 12 to 15 seconds ahead of their vehicles. Looking ahead will allow you to identify and react to hazards before meeting them. Be sure to specifically look for vehicles that are coming onto the highway, entering into your lane, or turning.

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.

When checking the engine compartment during the vehicle inspection test, you will need to check the engine oil level.

When inspecting a vehicle with air brakes that has a belt-driven air compressor, you should check the condition and tightness of the belt. It should be in good condition.

When inspecting the engine compartment, you should check the oil level, coolant level, and windshield washer fluid level, among other things.

During the vehicle inspection test, you will be asked to do a complete inspection of your vehicle. You will need to explain what you are inspecting and why.