Utah CDL DMV Knowledge Test Class B 1

In an air brake system, the air compressor governor controls when the air compressor pumps air into the air storage tanks.

Look at your truck's gauges when starting the engine. The oil pressure in an engine should come up to a normal level within seconds of the vehicle's engine being started.

When checking the oil pressure gauge as part of a vehicle inspection test, you must ensure that it is working. The gauge should show increasing or normal oil pressure, or the oil pressure warning light should turn off. If equipped with one, the oil temperature gauge should begin a gradual rise to the normal operating range.

If your vehicle begins to hydroplane, you can regain control by releasing the accelerator and pushing in the clutch.

A vehicle should be inspected before every trip to help ensure that any small mechanical issues are caught before they become more serious problems. It is better to discover a problem with your vehicle before a drive than after the drive has begun.

If your vehicle thumps or vibrates heavily, it may indicate that a tire has failed. Check your tires as soon as you can safely leave the road.

Driving at excessive speeds is a major cause of fatal crashes. Never drive above the posted maximum speed limit and adjust your speed to fit conditions.

Blocking and bracing are used to prevent cargo from shifting in transit. Blocking is used in the front, in the back, and on the sides of a piece of cargo to prevent movement. Bracing prevents movement by reaching from the upper portion of a piece of cargo to the floor and sides of the cargo compartment.

Skids caused by acceleration can usually be corrected by taking your foot off of the accelerator. If you are on an especially slippery surface, you may also need to push the clutch in.

If your license to operate your personal vehicle is revoked, canceled, or suspended, you may not obtain a hardship license to operate a CMV.

Use your senses during trips to help you identify mechanical issues. If you see, hear, smell, or feel anything that could indicate trouble, you should stop and check it out.

Factors that can affect stopping distance include the vehicle's speed, its weight, and the traction provided by the road surface.

After a trip, you may be required to perform an inspection and file a report on each vehicle that you've driven.

The liver removes alcohol from the body at a fixed rate. Despite popular belief, tricks like exercising or taking a cold shower will not speed up this process. The only way to become sober after drinking is to allow the body the time it needs to get rid of the alcohol.

In the event of a crash, a safety belt keeps the driver of a commercial motor vehicle securely positioned behind the steering wheel. This both protects the driver from injury and makes it easier for them to maintain control of the vehicle.

Both systems in a dual air brake system share a single air compressor. If the air compressor is damaged, neither system will be able to operate properly.

If you observe a crash involving an aggressive driver, you should stop a safe distance from the crash scene, wait for police to arrive, and inform them of the aggressive behavior you witnessed.

In an air brake system, the air compressor governor controls when the air compressor pumps air into the air storage tanks.

If brakes are overused, they can become too hot. This overheating causes them to fade, making them less effective at slowing the vehicle.

When checking your vehicle's tires, you should confirm that air pressure is neither too low nor too high; that there is at least 4/32 of an inch of tread depth in every major groove on the front tires; that there is at least 2/32 of an inch of tread depth in grooves on other tires; and that radial and bias-ply tires are not used together.

If you are asked to complete an offset back/left parking maneuver, you should first pull straight forward, then back up to the left. Your vehicle must be parked completely within the boundaries of the parking space.

Always downshift before entering a curve. Decreasing your speed before entering the curve will allow you to maintain better control over the vehicle throughout the curve.

Drivers behind you may not anticipate how slowly your CMV must travel to safely make a right turn. You can help warn them in advance by braking early and slowing gradually.

To reduce the chances of driving distracted, you should avoid eating, drinking, or smoking while driving. Anything that diverts attention from the task of driving is a distraction.

Always signal before turning or changing lanes to ensure that other drivers are aware of your intentions.

Factors that can affect stopping distance include your vehicle's speed, its weight, and the traction provided by the road surface.

If you wish to be licensed to drive a CMV with air brakes, you must pass the air brakes knowledge test and use a vehicle with air brakes for your skills test.

You may be able to tell that another driver is distracted if you can see them drifting within a lane or across lane dividers; traveling at inconsistent speeds; being preoccupied with a cell phone, a map, food, or other items; or engaging in conversation with passengers.

The posted speed limit on a curve may be safe to be taken by cars, but can still be too fast to be taken by larger vehicles, such as trucks. An operator driving their truck at the posted limit on a curve could cause their vehicle to tip over.

The securement of cargo must be checked before beginning a trip, within the first 50 miles of a trip, and then again every three hours or 150 miles thereafter.

When a vehicle is traveling on a downward slope, the force of gravity will cause its speed to increase.

You should always make sure that your vehicle will be able to stop within the area of the road that you are able to see. This means that you must slow down whenever conditions reduce visibility.

For the safety of everyone on the road, it is essential that you maintain adequate cushions of space between your vehicle and other vehicles. This will help ensure that if you need to stop your vehicle, you will be able to do so without hitting someone else.

Black ice is a thin layer of ice that is clear enough for the road surface to be seen through it. A road covered in black ice may look like it is merely wet. You should be very careful when temperatures are below freezing and the road looks wet.

Because air pressure can eventually leak away, the emergency brakes in an air brake system must be held on by mechanical force.