Idaho CDL DMV Knowledge Test Class A 1

Be cautious when driving near people who are working on a disabled vehicle on the side of the road. They may be focused on the repair and not paying attention to nearby traffic.

You must use the proper number of tie-downs when securing cargo on a flatbed trailer. Examples of tie-down equipment includes ropes, straps, and chains.

Your truck may block the views of drivers behind you, making them unaware of any upcoming hazards that require you to stop. For this reason, it is a good idea to flash your brakes and warn other drivers before slowing or stopping.

ABS malfunction lamps indicate that something in the Anti-Lock Braking System is not working properly.

You must take an air brakes knowledge test to become licensed to operate a vehicle that is equipped with air brakes, including an air over hydraulic braking system.

If the coolant temperature gauge goes above the highest safe temperature, you should stop driving as soon as possible and try to figure out what is wrong. There could be an issue in your vehicle that could lead to engine failure and possibly a fire.

Drowsy driving is most common during the night because people are naturally prone to be less alert in the hours during which they are normally asleep. If you must drive at night, take every precaution to prevent fatigued driving.

Be sure to check your mirrors before beginning a drive. Your posture may change day to day and your mirrors may need to be adjusted.

Escape ramps are constructed in areas with steep downgrades to allow a means of safely stopping runaway vehicles. They consist of a long bed of loose, soft material, and sometimes an uphill slope.

A steering wheel should have no more than 10 degrees of play. This is equal to about two inches of movement at the rim of a 20-inch wheel. If there is more play than this, it may be difficult to steer.

Vehicles equipped with Anti-Lock Braking Systems (ABS) have yellow malfunction lights to indicate issues in the braking system.

Regularly check mirrors on both sides of your vehicle while driving. It is important to be aware of what is happening behind and to the sides of your vehicle.

If you see a distracted driver, give them plenty of space and maintain a safe following distance.

You should always slow down and shift into a lower gear before starting down a hill. If you do not begin to drive down a hill at a low enough speed, you risk overusing your brakes, causing them to overheat and fade.

If you must back up, you should exit the cab and check your path for obstacles before beginning the maneuver. Drive as slowly as you can, checking your mirrors on both sides.

Most heavy vehicles with unsynchronized manual transmissions require double clutching to change gears.

Stay aware of upcoming obstacles and hazards by consistently watching the road at least 12 to 15 seconds ahead of your vehicle. When traveling at highway speeds, this is equivalent to about a quarter of a mile.

You must be properly restrained by a safety belt at all times when driving a commercial motor vehicle.

In wet conditions, a lack of spray coming from the tires of other vehicles indicates that ice has formed on the road. Be especially cautious when traveling under wet conditions in freezing weather.

If you must drive in reverse, you should first walk around your vehicle to look at the path of travel and check for obstacles. Because mirrors have blind spots, you cannot rely exclusively on them. It is recommended to use a helper whenever possible.

You must have a hazardous materials endorsement to drive a vehicle of any size that is used to transport defined classes of hazardous materials.

After starting the engine of a vehicle equipped with an Anti-Lock Braking System (ABS), the indicator light should come on and then turn off. If the light stays on, something is wrong with the ABS.

While speaking on a hands-free phone while driving is less dangerous than speaking on a hand-held phone, it is just as likely to mentally distract a driver. Simply engaging in conversation takes their mental focus away from the task of driving.

You will not be able to brake or steer your vehicle without adequate traction. Ensure that your tires are in proper working condition before beginning a trip.

Compressed air in an air brake system usually has a certain amount of water and oil in it. This can harm the system if allowed to accumulate. Air tanks have drain valves to aid in removing water and oil from the compressed air.

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 vehicle control skills test.

The purpose of an Anti-Lock Braking System (ABS) is to prevent a vehicle's wheels from locking up when the driver brakes hard on a slippery surface.

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.

A load of cargo must be properly balanced. Placing too much weight over an axle can damage the axle and make it more difficult for you to steer. Placing too little weight over an axle can cause poor traction, also leading to difficult handling.

A vehicle will be slowed down by gravity on any uphill grade. You may need to switch to a lower gear to climb a steep grade.

Bridges tend to freeze before other parts of the road surface. You should be especially careful on bridges when temperatures are near the freezing point.

After an engine is started, the coolant temperature should rise gradually to a normal operating range.

Sending and reading text messages while driving is both dangerous and illegal.

There are two indicators that determine when you need to shift into a higher gear. One indicator is the engine speed (rpm). You should read your vehicle's manual to learn its rpm range and shift up when you reach the top of that range. The other indicator is road speed (mph). You should learn which speeds each gear can accommodate, then keep an eye on the speedometer and shift up as needed.

It is important to observe other drivers' actions and identify clues that a person could be driving impaired. Drivers who have had too much to drink, are sleepy, are on drugs, or are ill can present hazards to other drivers. One sign that a driver may be impaired is that they have their windows rolled down in cold weather.