Oklahoma CDL Practice Test

Not quite. The answer is Use engine speed (rpm) and road speed (mph).

Before driving your vehicle, check the driver's manual to find out the recommended operating rpm range. As you're driving, keep your eye on your tachometer as your vehicle increases speed. Shift up when engine rpm gets to the top of the recommended range. Another way to know when to shift up is to learn in advance which gears are suited to which speeds. As you drive, watch your speedometer and shift accordingly.

Not quite. The answer is watch for sharp pavement drop-offs.

Dramatic pavement drop-offs are common in work zones, but they can also occur elsewhere. If you stray too near the edge of a drop-off, your vehicle may tilt toward that side of the road, and the top of your vehicle may hit a roadside object. If your vehicle crosses the drop-off, steering will be adversely affected.

Not quite. The answer is Both of the above

If the force applied to the wheels overcomes the tires' grip of the road, the tires will lose traction, which may lead to a skid. Two ways that this can happen are the following: (1) a sharp turn when the front wheels have insufficient traction because of insufficient weight on those wheels; (2) overacceleration supplying too much power to the drive wheels.

Not quite. The answer is The driver is inspected but not the vehicle.

The Level 1 roadside inspection is the most comprehensive inspection. It involves a 37-point inspection of both the driver and the vehicle. The Level 2 inspection is similar, except that nothing underneath the vehicle is inspected. In a Level 3 inspection, the driver is inspected but not the vehicle. In a Level 5 inspection, the vehicle is inspected but not the driver.

Not quite. The answer is It can help prevent distracted driving.

Anything that takes your eyes off the road constitutes a distraction. This can include fiddling with vehicle controls, such as mirrors, radio controls, or climate controls; reading maps or programming GPS navigators; or talking or texting on a hand-held cell phone. Try to get these activities done before you start your trip.

Not quite. The answer is If you stop on a hill or curve, it's necessary to place them up to 500 feet behind your vehicle.

Under federal regulation 49 CFR 392.22, if you must stop your CMV in an emergency at night or when visibility is low, you must turn on your four-way hazard flashers, AND you must set out your emergency warning devices (flares, fusees, or reflective triangles) within 10 minutes. That same regulation also states where you must place your emergency warning devices. If your vehicle is stopped within 500 feet of a curve, a crest of a hill, or another obstruction to viewing, you must place a warning device within 100–500 feet of your vehicle, in the direction of that obstruction.

Not quite. The answer is 12-volt

Most trucks on the road today have a 12-volt electrical system. In some of these trucks, however, batteries can be temporarily connected in series to drive a more powerful 24-volt starter for the purpose of cranking the engine.

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 3

Your truck's emergency equipment must include warning devices such as three reflective red triangles, three liquid burning flares, or six fusees.

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

Alcohol first affects a driver's judgment and self-control, and then it affects coordination, vision, and muscle control. These are all essential driving skills. Impairment of these skills significantly increases the chance of an accident. For a first offense of driving a commercial vehicle while under the influence of alcohol or drugs, you will lose your CDL for at least one year. In fact, you will also lose your CDL for a first offense of driving with a blood alcohol concentration (BAC) of 0.04% or higher, even though 0.04% is below the legal limit for licensed adult car drivers.

Not quite. The answer is all of the above.

Brakes are critical, so check them thoroughly. Check for cracked drums; shoes or pads with oil, grease, or brake fluid on them; or shoes worn dangerously thin, missing, or broken.

Not quite. The answer is two red flags

Under federal regulations, if the load is more than two feet wide and extends more than four feet behind the rear of the CMV, two square red flags, each 18 inches square, must be placed at the end of the load. If the load is no more than two feet wide, one square red flag will suffice. There are additional requirements on illuminating the load at night. US states may impose their own additional requirements on the transportation of oversized loads. You can learn about Oklahoma's requirements by contacting the Oklahoma Department of Public Safety or visiting their webpage "Chapter 30 – Size and Weight Permits" (https://www.ok.gov/dps/Administrative_Rules/Size_and_Weight_Permits/index.html). [49 CFR 393.11],

Source: 49 CFR 393.87

Not quite. The answer is The Working Load Limit is the maximum load that may be applied to a component of a cargo securement system during normal service. It is usually assigned by the manufacturer of the component.

The Working Load Limit (WLL) is the maximum load that may be applied to a component of a cargo securement system during normal service. It is usually assigned by the manufacturer of the component. No component of the cargo securement system should exceed its WLL during normal service.

Not quite. The answer is File a complaint with OSHA.

The Occupational Safety and Health Administration (OSHA) Whistleblower Protection Program enforces the whistleblower provisions of more than 20 whistleblower statutes protecting employees from retaliation for reporting violations of various federal workplace laws. If your employer retaliated against you for expressing a job-related safety concern, you may file a complaint with OSHA within 30 days.

Source: "The Whistleblower Protection Program," Occupational Safety and Health Administration, https://www.whistleblowers.gov/

Not quite. The answer is Air brakes

Federal regulation 49 CFR 383.93 defines six different endorsements: Tank Vehicle, Hazardous Materials, Double and Triple trailers, Passenger, School Bus, and Combination tank vehicle and hazardous materials. According to federal regulation 49 CFR 383.95, a restriction on your CDL will prohibit you from operating vehicles with air brakes, until you pass the official knowledge test on air brakes and pass a skills test in a vehicle equipped with air brakes. Therefore, the qualification to drive vehicles with air brakes is NOT an endorsement, but the removal of a restriction that prohibits you from driving vehicles with air brakes.

Not quite. The answer is 60 days

You will be disqualified from operating a CMV for at least 60 days if you are convicted of any of the following offenses at railroad crossings: (1) failing to slow down and check that the tracks are clear; (2) failing to stop if a train is approaching; (3) failing to stop before driving onto the crossing; (4) failing to ensure that there is sufficient space for you to drive completely through the crossing without stopping; (5) failing to obey a traffic control device or the directions of an enforcement official; (6) failing to negotiate the crossing because of insufficient undercarriage clearance.

Source: 49 CFR 383.51

Not quite. The answer is Many CMV accidents occur between midnight and 6:00 a.m.

Driving through the night when you would normally be asleep increases your risk of an accident. Many CMV accidents occur between midnight and 6:00 a.m. If you've had less than 6 hours of sleep before you drive, your risk of an accident is tripled. And one study has found that going without sleep for more than 24 hours can impair your coordination and reaction time as much as being legally intoxicated.

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 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 both of the above.

Regardless of who loads and secures the cargo, you, the driver, are responsible for its safety. As part of your pre-trip inspection, make sure that the cargo is balanced, secured, and not overloaded, and does not get in the way of emergency equipment. The cargo's safety could be compromised otherwise.