Kentucky CDL DMV Knowledge Test Class A 1

Cargo and its securing devices must be inspected before starting a trip. After beginning a trip, the driver should check the load and securing devices within the first 50 miles on the road, every three hours or 150 miles traveled, and after every break.

Stay as far away from a fire as possible and aim your fire extinguisher at the source or base of the fire, not at the flames. It may be appropriate to extinguish certain fires with water. If you are unsure of how to treat a specific fire, you should wait for trained firefighters to arrive.

In heavy traffic, it is safest to travel at the same speed as other vehicles. If two vehicles continue to drive in the same direction at the same speed, they cannot hit each other.

Blocking is used in the front, in the back, and/or on the sides of a piece of cargo to keep it from sliding while the vehicle is in motion.

A load of cargo must be properly balanced. Placing too much weight over an axle can damage the axle and make it more difficult for you to steer. Placing too little weight over an axle can cause poor traction, also leading to difficult handling.

When asked to make a lane change during the on-road driving test, you should make the proper traffic checks, use your turn signal, and smoothly change lanes when it is safe to do so.

The liver removes alcohol from the body at a fixed rate. Despite popular belief, tricks like drinking coffee or taking a cold shower will not speed up the process. The only way to become sober is to allow your body the time it needs to remove the alcohol from your system.

Braking after a tire fails can result in a loss of control. Stay off your brakes, if possible, until your vehicle has slowed considerably.

It is illegal to operate a CMV if your blood alcohol concentration (BAC) is 0.04 percent or higher. A first offense will result in the loss of your CDL for one year. A second offense will result in the loss of your CDL for life.

When properly adjusted, your mirrors should each display some part of your vehicle. Being able to see your own vehicle in your mirrors will give you a point of reference when judging the positions of other objects.

When turning, drivers usually look in the direction of their turn. If a driver fails to signal before a turn or lane change, their body movements may still provide a clue that they are planning to turn.

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.

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.

To avoid engaging in aggressive driving behavior, it is helpful to give other drivers the benefit of the doubt. Assume that they have valid reasons for what they are doing and don't take their actions personally.

On flatbed trailers and trailers without sides, cargo must be tied down to prevent it from shifting or falling off in transit.

Use your senses during trips to help you identify mechanical issues. If you see, hear, smell, or feel anything that could indicate trouble, you should stop and check it out.

It is important to know the maximum air loss rate that is safe for your specific vehicle. A triple combination should have a leakage rate no higher than 6 psi in a minute during an applied leakage test.

Be cautious when driving near people who are working on a disabled vehicle on the side of the road. They may be focused on the repair and not paying attention to nearby traffic.

There are two air brake systems in a dual air brake system. The systems share a set of brake controls, but each system has its own tanks, hoses, and lines.

Backing is always dangerous because it is impossible to see everything that is behind your vehicle. Only drive in reverse if it is absolutely necessary.

If your vehicle begins to hydroplane, you can regain control by releasing the accelerator and pushing in the clutch.

Skills tests must be taken in the type of vehicle the applicant plans to drive. The applicant is generally responsible to supply the testing vehicle.

The body processes alcohol at a fixed rate that cannot be sped up through tricks like drinking coffee. The only way to sober up is to give the body the time it needs to remove the alcohol on its own.

If you begin to feel tired while driving, the only safe action to take is to stop and get some sleep. Trying to fight the fatigue and press on is very dangerous and can result in a fatal crash. You should not rely on artificial stimulants; these may help keep you awake a while longer, but they won't make you more alert.

Warning placards are required to be used any time a vehicle is carrying designated types and amounts of hazardous materials. A placarded vehicle must display placards on all four of its sides.

Blocking and bracing are used to prevent cargo from shifting in transit.

On vehicles with Anti-Lock Braking Systems (ABS), yellow malfunction lamps alert the driver to ABS malfunction.

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

A Gross Vehicle Weight Rating (GVWR) is the value specified by the manufacturer as the loaded weight of a single vehicle.

Low beam headlights should be used for best visibility, even during the day. Using high beam headlights around other drivers can be dangerous.

When driving at dawn, at dusk, or in inclement weather, you should use your headlights on their low beam setting to increase your visibility.

If you experience tire failure, you may hear the loud "bang" sound of a blowout or feel a heavy thumping or vibration in your vehicle. If steering begins to feel heavy, or if the rear of your vehicle begins to fishtail, you should stop to check your tires.

It is a driver's responsibility to make sure their vehicle is not overloaded. They must be aware of legal weight limits and the maximum weight that their vehicle is rated to carry, including the weight capacity rating of the suspension system.

If you begin to feel tired while driving, you should stop to get some sleep. Trying to push on to reach your destination while tired is dangerous. You should not rely on caffeine to keep you awake.

When inspecting your vehicle, you should check the wiper blades for damage, stiff rubber, and proper securement.