Indiana CDL DMV Knowledge Test Class B 1

To prevent rolling backward when starting from a stop, you should partly engage the clutch before removing your foot from the brake. Apply the parking brake whenever necessary to prevent your vehicle from rolling back.

If the road appears to be wet but the wheels of other vehicles are no longer generating spray, ice has formed on the road. Drive with extra caution when operating on wet or icy roads.

In a tractor-trailer combination, if the tractor is equipped with an Anti-Lock Braking System (ABS) but the trailer is not, the ABS will still improve the driver's steering control. The driver should keep an eye on the trailer and let up on the brakes if the trailer begins to swing out.

Some pre-1975 vehicles have a front brake limiting valve, which has "normal" and "slippery" settings. The idea behind these valves was to limit the air pressure available to the front brakes when driving on slippery surfaces, and thereby reduce the danger of a front-wheel skid. Studies have found that this is not actually a concern, so if your vehicle has a front brake limiting valve, leave it in the "normal" position.

You must sign the previous vehicle inspection report only if defects were noted and certified to have been repaired or not needing to be repaired.

Most CDL holders who drive CMVs in interstate commerce are non-excepted interstate commerce drivers.

If a hazard requires you to drive onto the shoulder of a road, you should try to keep one set of wheels on the pavement to maintain better control of your vehicle. If possible, stay on the shoulder until your vehicle has come to a complete stop, then pull back onto the road when it is safe to do so.

In an air brake system with manually operated drains, the tanks should be drained at the end of each day of driving.

To warn drivers behind you that you are about to slow down, it may be a good idea to first lightly tap your brake pedal a few times to make the brake lights flash.

Before starting down a hill, you should shift into a lower gear. This will help get your vehicle to a speed that you can control without having to use your brakes too much.

When approaching your vehicle to conduct an inspection, you should look underneath it to make sure there are no fresh oil, coolant, grease, or fuel leaks on the ground. Leaks can indicate unsafe defects on a vehicle.

The service brake system applies and releases the brakes when a driver presses the brake pedal while driving normally.

All trucks, truck tractors, and buses must be equipped with emergency brakes and parking brakes. These brakes must be held by mechanical force.

Roads are often at their most slippery when rain is just beginning to fall. This is because water mixes with oil and grease on the road to create a slick surface. As rain continues, the oil and grease will wash away.

A high center of gravity makes a vehicle more likely to tip over.

B and C type fire extinguishers are designed to work on electrical fires. Water should never be used to extinguish an electrical fire because doing so could result in an electrical shock.

If you must drive in reverse, you should first walk around the vehicle to check for hazards in your path of travel. Make frequent use of the mirrors on both sides of your vehicle while backing. Always back up as slowly as possible.

When backing with a trailer, you should pull up to reposition your vehicle as needed.

As a part of earning your CDL, you will have to pass an inspection test and demonstrate that your vehicle is safe for operation. During the vehicle inspection test, you will have to walk around the vehicle and point to or touch each item and explain to the examiner what you are checking and why. You will not have to crawl under the hood or under the vehicle.

If a tractor is equipped with an Anti-Lock Braking System (ABS) but the trailer is not, the risk of jackknifing will be reduced and the driver should still be able to maintain steering control. If only the trailer is equipped with ABS, it is less likely that the trailer will swing out to one side.

When inspecting a vehicle's suspension, you should look for broken or missing leaves in the leaf springs. Any defect of this kind is dangerous. If one-fourth or more of the leaves are missing from any leaf spring, the vehicle must be put out-of-service.

Before changing lanes, check your mirrors to make sure you have enough space to safely move. After activating the appropriate turn signal, check again to see if anyone has moved into your blind spot. After you begin to change lanes, check once more to verify that your path is still clear.

If you use your brakes too much when traveling on a steep downgrade, they may overheat and become less effective. To avoid causing your brakes to overheat on a steep hill, you should rely on engine braking.

If cargo is covered, the cover should not flap in the wind in transit. The cover could tear loose, uncovering the cargo while potentially blocking your view or the view of others.

When using a fire extinguisher, you should stay as far away from the flames as possible and aim at the base of the fire.

When exiting your vehicle during the basic vehicle control skills test, you must face the vehicle and maintain three points of contact at all times. If your testing vehicle is a bus, you must maintain contact with the handrail. Exiting the vehicle incorrectly may result in automatic failure of the basic control skills test.

During the on-road driving skills test, you may be asked to drive on an expressway. Make sure you maintain proper lane positioning, vehicle spacing, and vehicle speed. Continue to thoroughly check traffic in all directions while on the expressway.

The air that enters air storage tanks in an air brake system usually contains a certain amount of water and compressor oil. Because accumulations of these materials can damage the braking system, tanks are equipped with drains to allow their removal.

When inspecting a vehicle's brakes, you should make sure the shoes and pads do not have oil, grease, or brake fluid on them.

Accelerate smoothly and gradually. Rough acceleration can cause mechanical damage.

If cargo is covered, the cover should not flap in the wind in transit. The cover could tear loose, uncovering the cargo while potentially blocking your view or the view of others.

Stopping is not always the safest option when responding to an emergency while driving. It is usually safer to steer out of the way when attempting to avoid a crash.

Bridges usually freeze before the rest of the road. You should be especially careful when crossing bridges if the temperature is near the freezing point.

An air compressor governor will stop the compressor from pumping air once the air tanks are at an air pressure level of 125 psi. This air pressure level is referred to as the "cut-out" level.

Texting while driving a commercial motor vehicle is both illegal and dangerous. Manually entering text into or reading text from any electronic device is considered texting.