Utah CDL: General Knowledge Practice Test

Not quite. The answer is 10 feet behind and up to 500 feet behind your vehicle.

This is required by federal regulation 49 CFR 392.22. This regulation also specifies where to place warning devices on other types of roadways such as undivided two-way roads and hills. These situations are also covered in the section on "Communicating Your Presence" in the Utah Commercial Driver License Manual.

Not quite. The answer is do both of the above.

Escape ramps have been built on many steep mountain downgrades. Escape ramps are made to stop runaway vehicles safely without injuring drivers and passengers. Escape ramps use a long bed of loose, soft material to slow a runaway vehicle, sometimes in combination with an upgrade.

Not quite. The answer is Within the first 50 miles of the trip and then every 150 miles or every 3 hours, whichever comes first

While the rules vary by jurisdiction, your state CDL handbook states that you should check your cargo within the first 50 miles of your trip and then every 3 hours or 150 miles, as well as after each break you take.

Not quite. The answer is To turn quickly, keep a firm grip on the steering wheel.

In an emergency, stopping may not be the safest thing to do. The stopping distance of your vehicle at high speed can be longer than a football field. If you don't have enough room to stop, you may have to steer away from the hazard. Remember, you can almost always turn to miss an obstacle more quickly than you can stop. To turn quickly, you must have a firm grip on the steering wheel with both hands.

Not quite. The answer is Release the accelerator.

Hydroplaning is more likely at higher speeds. If your vehicle starts to hydroplane, avoid braking. Instead, release the accelerator and push in the clutch to let your vehicle slow down.

Not quite. The answer is 60

Under the Hours of Service 60-Hour Rule, you must not be on duty longer than 60 hours in a 7-day period. That's an average of about 8.6 on-duty hours per day. Learn how to budget your time so you can work a reasonable number of hours each day. Note that "on duty" includes all work time, both driving and not driving (such as when conducting pre-trip inspections).

Not quite. The answer is Stay off the brake until your vehicle has slowed down.

In the event of a blowout at high speed, DON'T BRAKE unless you must do so to prevent a collision. Braking can lock the wheels and cause loss of control. Instead, hold the steering wheel firmly and keep your vehicle on course until it slows down. Then brake very gently, pull off the road, and stop.

Not quite. The answer is steer around it without making a sudden or unsafe move.

You have no way of knowing what may be inside a seemingly harmless-looking object on the roadway. Even cardboard boxes, paper or cloth sacks, or plastic containers may contain some solid or heavy material or a sharp object capable of causing damage. Always scan the roadway at least 12 to 15 seconds ahead so that you can spot such obstacles in time to steer around them safely.

Not quite. The answer is Turning the wheel back in the other direction after steering to avoid a hazard

In a quick turning maneuver such as recovering from a drive-wheel braking skid or moving from the shoulder onto the roadway at a higher speed, your vehicle will tend to overshoot and keep turning in the same direction more than you want it to. Be ready to counteract this by turning your steering wheel in the opposite direction. This is known as countersteering.

Not quite. The answer is do both of the above.

A front-end header board is located behind the cab. The header board prevents cargo from moving forward (and possibly injuring you) in the event of a crash or sudden stop. Check to make sure that the header board is secure, upright, and undamaged (no dents, no corrosion, no missing rivets, etc.).

Not quite. The answer is All of the above statements 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 retarders in poor weather.

Not quite. The answer is one-third.

When a road is wet, stopping distance is increased, and you should reduce your speed by one-third. On snow, slow to one-half your usual speed. On icy roads, slow to a crawl and stop driving as soon as you can do so safely.

Not quite. The answer is You will be put out-of-service for 24 hours.

There is no safe amount of alcohol with which to drive a CMV. Hence, if you are found to have any detectable BAC (even if it's under the legal limit of 0.04%), you will be placed out-of-service for 24 hours.

Not quite. The answer is Stop safely and fix the problem.

If your view through the windshield is obscured because your windshield wipers aren't clearing the windshield, pull over as soon as possible and fix the problem. Remember: If you can't see, you can't drive.

Not quite. The answer is There are blind spots that your mirrors cannot show you.

Mirrors can show a great deal around your vehicle, but there are still blind spots that you can't see. Keep an eye on all the vehicles around you that you can see, in case one of them starts to move into one of your blind spots. Also use a helper when backing.

Not quite. The answer is Watch gauges and mirrors and use your senses to check for problems.

During your trip, you should be watching a number of things, such as your mirrors, gauges, instruments, lights, tires, and cargo. Use several of your senses – sight, hearing, smell, and feel – to detect possible trouble.

Not quite. The answer is You should avoid backing whenever you can.

Backing up a large vehicle is always dangerous, even with a helper. Try to avoid backing up as much as possible.

Not quite. The answer is Upon exiting a tunnel

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 suddenly 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 Time

Your body breaks down alcohol at a predictable rate. Typically, this is one standard drink per hour, where one standard drink equals 1.5 ounces of hard liquor, 5 ounces of wine, or one 12-ounce can of beer. Neither coffee nor fresh air nor water can increase that rate. You need to wait until the alcohol has been broken down.

Not quite. The answer is 3/8-G30; 2,650 pounds

Welded steel chain that is not marked or labeled with a grade or working load limit (WLL) is considered to have a WLL equal to that of grade 30 proof coil chain. Hence, each size 3/8" chain should be marked "3/8-G30." According to the WLL table in federal regulation 49 CFR 393.108, size 3/8" proof coil chain with grade 30 has a WLL of 2,650 pounds.