Georgia CDL Practice Test

Not quite. The answer is The use of alcohol or drugs can lead to a collision or an arrest.

Some prescription drugs can impair your driving abilities. Some drugs can make you drowsy or impair your coordination. Stimulants can impair your concentration and affect your vision. And once the stimulant wears off, you may "crash" (feel even more drowsy and tired than you did before). Take a prescription drug only if your doctor assures you that the drug won't impair your driving abilities.

Not quite. The answer is all of the above.

There are a lot of things to check at the front of your vehicle: the condition of the axle, the condition of the steering system, the condition of the windshield, and the condition of all lights and reflectors located on the front of the vehicle.

Not quite. The answer is Steering knuckle

If the front wheels were mounted directly on the front axle, they couldn't turn left or right. Instead, each wheel pivots left or right on a steering knuckle, which is mounted to the axle. Component C is the left steering knuckle.

Not quite. The answer is throw it as hard as you can.

Take several precautions for safety. Throwing straps can strain your arm or shoulder muscles. Consider doing some limbering-up exercises before starting this activity. Wear a safety helmet (hard hat) in case the strap rebounds unexpectedly (say from a sudden gust of wind). Make sure there is no one on the opposite side who could be hit, but shout a warning anyway, just in case. Toss the strap over the load with a firm but smooth and controlled motion. Avoid excessive force, which could cause the strap to rebound, unravel or whip erratically, or strike someone.

Not quite. The answer is To reduce emissions of nitrogen oxides (NOx)

The exhaust gases of diesel engines include nitrogen oxides (NOx), a major contributor to air pollution and acid rain. To reduce most nitrogen oxide emissions, diesel exhaust fluid (DEF) is sprayed into the stream of exhaust gases. DEF reacts with the NOx to form harmless nitrogen gas and water vapor. According to the official state CDL manual, the DEF tank should be kept more than 1/8 full. (Typically, a CMV uses about 1 gallon of DEF for every 50 gallons of diesel fuel.)

Not quite. The answer is They can make navigation errors.

Federal, state, and local regulations can restrict the routes that CMVs can legally and safely take. A GPS navigation device or smartphone app that is designed for CMV operators can choose an allowable route, even avoiding grades and sharp curves that might be difficult for your vehicle. But for these features to work properly, you must input the weight and dimensions of your vehicle as well as whether it is carrying hazardous materials (which is why you shouldn't use Google Maps or a car navigation device or app). If you don't do this properly, the device or app may choose an inappropriate route. Plus, it's always possible for your device to mislead you anyway because of erroneous or out-of-date software. Don't depend entirely on your GPS navigator while you're driving. Double-check the route before you attempt to drive it.

Not quite. The answer is The consistency of the concrete to be poured

"Slump" is a measure of the consistency of fresh concrete. You measure slump by forming a sample of the concrete into a standard-shaped 12-inch-high cone, and measuring how far the cone "slumps" (i.e., how much its height declines). The more it slumps, the thinner the consistency of the concrete. For example, concrete with a 5-inch slump is thinner than concrete with a 3-inch slump.

Not quite. The answer is report the problem and make arrangements to use another vehicle.

Report any problems that could jeopardize your safety or that of others or lead to a breakdown. Don't drive the vehicle until those defects are corrected. Obviously the steering system is critical and must be in good working order. An exhaust system leak could let poisonous fumes into your cab or sleeper berth.

Not quite. The answer is Yes.

Under federal regulations, you may not drive a property-carrying motor vehicle unless every passenger is wearing a seat belt (if the seat is so equipped).

Source: 49 CFR 392.16

Not quite. The answer is Contain the fire

Before trying to put out the fire, make sure that it doesn’t spread any further.

Not quite. The answer is All of the above

At a roadside inspection, inspectors will place a driver out of service for any of the following violations: (1) fatigue, serious illness, or under the influence of alcohol or drugs; (2) lack of proper CDL or proper endorsements; (3) inadequate documentation of the last 7 days of duty status on a logbook or electronic logging device (ELD). Effective June 2025, inspectors at most locations will also place a driver out of service for inability to adequately communicate with the inspectors in English. However, drivers operating commercial motor vehicles in the border commercial zones along the U.S.-Mexico border who fail to demonstrate English proficiency will be cited but not placed out of service.

Not quite. The answer is 35 to 75 psi.

When you're stopped and the engine is idling, engine oil pressure should be between 5 and 20 psi. When you're driving at speed, oil pressure should be between 35 and 75 psi. Never try to drive with low oil pressure. Driving without sufficient oil can easily damage the engine. The oil level warning light on the dash should come on if the oil level drops too low. In some modern CMVs, the engine will automatically shut down.

Not quite. The answer is Your vehicle does not exceed weight restrictions.

You are not responsible for the state of sealed cargo, nor can you inspect it. You are responsible for the safety of your vehicle and its cargo. You are responsible for an overloaded vehicle, so make sure that you haven't exceeded gross weight or axle weight limits. Also make sure that your load is properly balanced in your vehicle.

Not quite. The answer is 1

The Commercial Vehicle Safety Alliance (CVSA) developed the National Roadside Inspection Program, which defines eight different levels of inspections, each with its own list of items to be inspected. Level 1 is the most comprehensive. Both the driver and the vehicle are checked. The inspector checks the vehicle by a walkaround inspection and by getting physically underneath the vehicle to check for defects there. Level 2 is similar to Level 1, except the inspector doesn't get underneath the vehicle. Only a walkaround inspection is performed on the vehicle.

Not quite. The answer is Type of tire tread

To determine which low gear to use to begin a descent, consider the weather, the length and steepness of the downgrade, the weight of your cargo, and the road conditions.

Not quite. The answer is Chains

Under federal regulations, a "large boulder" has a volume of more than 2 cubic meters or weighs more than 11,000 pounds. Each large boulder must be supported on at least two pieces of hardwood blocking that extend across the full width and 3/4 of the length of the boulder. Only chains can be used as tie-downs. The chains should be placed in valleys or notches on the top of the boulder, and arranged to prevent the chains from sliding across the rock surface.

Source: 49 CFR 393.136

Not quite. The answer is Yes, and they might place it out-of-service.

Federal or state inspectors may inspect your vehicle. If they find a problem that makes the vehicle potentially unsafe, they will put the vehicle out-of-service until the problem is fixed.

Not quite. The answer is Signal other drivers when it is safe for them to pass you.

If you must drive slowly, keep right and (if state laws allow it) use your four-way flashers to warn other drivers. Don't try to signal other drivers when you believe it's safe for them to pass you. If something were to go wrong, resulting in an accident, you could be held legally liable.

Not quite. The answer is park in an open area.

If your vehicle catches fire, pull off the road and park in an open area away from anything that might catch fire, such as buildings or trees. Especially avoid parking your burning vehicle near a gas station!

Not quite. The answer is whenever you become drowsy.

To help prevent the onset of drowsiness, take a short break from driving every two hours or 100 miles, whichever comes first. However, if you start to feel drowsy anyway, get off the road and get some sleep.