Colorado CDL Practice Test

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 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 All of these answers are correct.

While retarders can help reduce the need for braking, they can make a skid more likely in inclement weather or whenever your wheels have poor traction. Therefore, you should always turn off your retarder in poor weather.

Not quite. The answer is Pull off the road into a rest area or truck stop

You should watch for foggy conditions and be ready to reduce your speed. Do not assume that the fog will thin out after you enter it. The best advice for driving in fog is: don’t. It is preferable that you pull off the road into a rest area or truck stop until visibility is better. Watch for vehicles on the side of the roadway. Seeing taillights or headlights in front of you may not be a true indication of where the road is ahead of you. The vehicle may not be on the road at all.

Not quite. The answer is Wood

A B:C fire extinguisher should not be used on burning materials that you can use regular water on, such as wood, paper, and cloth. These require an A or A:B:C fire extinguisher.

Not quite. The answer is Signal before you change lanes, and change lanes slowly and smoothly.

To change lanes, (1) make the necessary traffic checks first; (2) give the proper signals; and (3) smoothly change lanes when it is safe to do so.

Not quite. The answer is All of the above are true.

An automated manual transmission (AMT) is designed rather like an ordinary manual transmission. That is, unlike an automatic transmission that usually employs a torque converter, an AMT employs gears mounted on shafts, and it shifts with the aid of a clutch. However, in an AMT, a computer controls various linkages to handle the clutching and gear shifting (there is no shifter stick), freeing the driver to focus more on the road. Some older AMTs used to come with a clutch pedal for manual shifting when starting or stopping. With today's AMTs sold in the United States, however, there is no clutch pedal, making the driving experience more like that of a fully automatic transmission.

Not quite. The answer is control of the vehicle.

For full control of your vehicle, you need to know when and how to upshift or downshift. Learn under what special conditions you should downshift. For example, learn how to use engine braking to slow your vehicle on a steep descent.

Not quite. The answer is Both of the above

When changing lanes, check your mirrors at each of the following times: (1) before you change lanes, to make sure there is enough room; (2) after you have signaled, to check that no one has moved into your blind spot; (3) right after you start the lane change, to double-check that your path is clear; and (4) after you complete the lane change.

Not quite. The answer is It can startle other drivers.

Your horn can startle other drivers, pedestrians, or animals. Hence, it should only be used to warn others of a potential hazard, not for general communication and certainly not to express anger or frustration.

Not quite. The answer is There are blind spots you can't see.

If you can, use a helper when backing up. Even with all your mirrors, there are still blind spots that you cannot see. The helper can stand near the rear of your vehicle and keep an eye on your blind spots. He or she can signal you to stop before an accident can occur.

Not quite. The answer is take short breaks before you get drowsy.

The monotony and boredom of a long drive can lead to highway hypnosis and drowsiness. To prevent this, stop for a break about once every two hours or 100 miles. Some cold and allergy medications can cause drowsiness, sedation, or disturbed coordination, which makes them dangerous for CMV operators. If you are unsure about the effects of a particular medication, check the warning label or ask your pharmacist or doctor.

Not quite. The answer is Both of the above

Be sure to use the right fire extinguisher to put out a fire. A Class A fire involves ordinary combustibles such as wood, paper, cloth, or rubber. A Class B fire involves flammable liquids such as gasoline, grease, or oil. A Class C fire involves electrical equipment. A Class D fire involves combustible metals such as magnesium or potassium. An A:B:C extinguisher can put out Class A, Class B, and Class C fires.

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 Neither (a) nor (b)

If you're starting off your vehicle on an incline, take several steps to keep from rolling back. If you have a manual transmission vehicle, partly engage the clutch before you take your right foot off the brake. Apply the parking brake whenever necessary to keep from rolling back. Release the parking brake only when you have applied enough engine power to keep from rolling back. On a combination vehicle equipped with a trailer brake hand valve, the hand valve can be applied to keep from rolling back.

Not quite. The answer is 4

The formula for following distance is one second per ten feet of vehicle, plus an extra second if you are traveling over 40 mph. So for a 30-foot vehicle going 55 mph, you should leave a following distance of 4 seconds.

Not quite. The answer is body weight.

Your blood alcohol concentration (BAC) is affected by how much alcohol you drink, how quickly you drink it, and how much you weigh. The larger your body, the larger the volume through which the alcohol has to spread.

Not quite. The answer is There may be strong winds when exiting.

Inside a tunnel, you don't feel the effect of crosswinds pushing you sideways. But once you emerge from the tunnel into an open space, the crosswinds will hit you. If your vehicle is traveling alongside another vehicle, there is some chance that the crosswinds will push one of the vehicles against the other.

Not quite. The answer is hold the triangles between yourself and oncoming traffic.

As you carry the reflective triangles to place them around your vehicle, hold them between yourself and traffic to help you stay visible to other drivers.

Not quite. The answer is $2,750

The current penalties for violating federal regulations on driving a CMV at railroad crossings, are up to $2,750 for drivers and up to $11,000 for employers who allow or require their drivers to commit such violations. Furthermore, you will be disqualified from driving for at least 60 days for a first offense, at least 120 days for a second offense within three years, and at least one year for a third offense within three years.