Nevada CDL DMV Knowledge Test Class A 2

To avoid hitting anything behind you, make sure that your vehicle does not roll back when you start from a complete stop.

The only effective way to deal with drowsiness while driving is to stop and sleep. Caffeine or other stimulant drugs may help you stay awake, but they will not keep you alert. You will likely end up being even more tired when the artificial stimulants begin to wear off.

When driving, you should regularly check your mirrors, both to be aware of traffic and to check for problems on your own vehicle.

Hydroplaning is an effect in which a vehicle's tires lose traction with the surface of the road and instead glide along a layer of water. There does not have to be much water on the road for this to occur.

You must have a hazardous materials endorsement to drive a vehicle of any size that is used to transport defined classes of hazardous materials.

While regular mirror checks should be part of your normal driving routine, checking your mirrors is especially important when turning, changing lanes, merging, and performing tight maneuvers.

When inspecting your vehicle, you should check the wiper blades for damage, stiff rubber, and proper securement. Clean the blades if they are dirty.

A driver's seat should always be equipped with a seat belt. You must wear a seat belt at all times while operating a CMV.

An alcohol evaporator can help prevent ice from building up in an air brake system. In cold weather, the evaporator should be checked and refilled every day.

Drowsy driving is most common during the night because people are naturally prone to be less alert in the hours during which they are normally asleep. If you must drive at night, take every precaution to prevent fatigued driving.

You should always apply the parking brake when leaving your vehicle.

Traffic violations classified as "serious" include excessive speeding, reckless driving, operating a CMV without a valid CDL, following other vehicles too closely, and improper lane usage. Consequences for multiple serious traffic violations can result in license disqualification.

If you wish to be licensed to drive a CMV with air brakes, you must pass the air brakes knowledge test and use a vehicle with air brakes for your skills test.

To keep an engine fire from spreading, you should turn off the vehicle's engine as soon as possible. Do not open the hood if you don't have to.

On a downgrade, the force of gravity will cause a vehicle to speed up. Adjust your speed before approaching a hill to reduce overuse of your brakes.

Underloading a front axle may make it impossible to safely steer your vehicle. Keep weight distribution in mind when loading cargo.

When checking a cargo lift as part of your vehicle inspection test, you should check for leaking, damaged, or missing parts. The lift must be fully retracted and latched securely.

When approaching your vehicle before an inspection, make note of its general condition and ensure that it is not damaged or leaning. Look under the vehicle for fresh leaks. Check around the vehicle for hazards to movement, such as people, other vehicles, or low-hanging wires or tree limbs.

On a long or steep downgrade, brakes should only be used to supplement the braking effect of the engine. Apply the brakes just enough to feel a definite slowing down, then release them once you are about 5 mph below your target "safe" speed. Once your vehicle reaches its safe speed again, repeat this process.

In an air brake system, air tanks have drains to remove accumulations of water and compressor oil. Allowing water and oil to accumulate in the system could cause damage to the brakes.

If the low air pressure warning signal comes on while you are driving a vehicle with air brakes, you should immediately bring the vehicle to a safe stop while you are still able to control the brakes. Inspect and repair the brakes as soon as possible.

In the event of an engine fire, you should turn off the engine as soon as possible. Do not open the hood unless absolutely necessary. Using a fire extinguisher, shoot foam through the louvers or radiator, or from the vehicle’s underside. If you are unsure of how to treat a fire, wait for firefighters to arrive.

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

If there is enough water on the road, hydroplaning can occur at speeds as low as 30 mph. It is most likely if the tires' air pressure is too low or if tires' tread is worn.

When using a fire extinguisher, you should stay as far away from the flames as possible and aim at the base of the fire.

Because live animals can lean during curves, and otherwise move in transit, the weight distribution of a cargo of livestock is unstable. Driving with livestock requires special care.

When stopping, apply gradual pressure to the brake pedal and stop smoothly. If stopping a manual transmission vehicle, push the clutch in when the engine is close to idle.

All commercial motor vehicles are required to be equipped with the proper emergency equipment. This may include spare electrical fuses; three red reflective triangles, six fuses, or three liquid burning flares; and at least one properly charged and rated fire extinguisher.

The suspension system performs the vital functions of holding up the vehicle and its load while keeping the axles in place. Defects in the suspension are therefore extremely dangerous.

The Anti-Lock Braking System (ABS) indicator light should come on after an engine is started. The light will then turn off. If the light remains on, the ABS it not working properly.

When inspecting your vehicle's engine compartment, be sure to check the oil level; the radiator coolant level and the condition of the hoses; the power steering fluid level and the condition of the hoses, if applicable; the windshield washer fluid level; the battery connections, fluid level, and tie-downs; the automatic transmission fluid level; and the condition and tightness of the belts. Additionally, check for any leaks in the engine compartment and cracked or worn electrical wiring insulation.

Always shift to a lower gear before starting down a hill. Doing this will help your vehicle maintain a safe speed without you needing to use the brakes too much.

Because air takes time to flow through the air lines to the brakes, air brakes cannot begin working instantly. There is often a brake lag of at least one-half of a second between the moment the brake pedal is pressed and the moment the brakes begin to work. On vehicles with hydraulic brakes, the brakes work instantly when the pedal is pressed.

When stopping, you should push the brake pedal down gradually. Braking gradually will help you to maintain proper control of your vehicle.

You should be cautious when you are near people who are not paying attention to the road. Be wary of drivers who are engaged in conversation with passengers, children near the road, and road workers.