CDL General Knowledge II

2.

What is the correct way to view the sides and rear?

By looking out the window
Checking your mirrors regularly
Getting on the C. B. radio.

Correct Answer

A. Checking your mirrors regularly

Explanation

The correct way to view the sides and rear is by checking your mirrors regularly. Mirrors provide a clear and immediate view of the surrounding areas, allowing the driver to be aware of any potential hazards or vehicles approaching from behind. By regularly checking the mirrors, drivers can make informed decisions and adjustments to ensure their safety on the road.

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3.

What does "communicating" mean in safe driving?

Letting other drivers know you're there to help prevent accidents.
Using hand signals.
Driving a brightly colored vehicle.

Correct Answer

A. Letting other drivers know you're there to help prevent accidents.

Explanation

"Communicating" in safe driving refers to the act of letting other drivers know that you are present on the road in order to help prevent accidents. This can be done through various means such as using turn signals, headlights, or honking the horn to signal your intentions and alert others to your presence. By effectively communicating with other drivers, you are promoting awareness and reducing the risk of collisions or misunderstandings on the road.

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4.

Where should your reflectors be placed when stopped on an undivided highway?

Within 10 feet of the front or rear and 100 feet behind and ahead of the vehicle.
Within 50, 100, and 150 feet of the vehicle.
Within 10, 20, and 30 feet of the vehicle.

Correct Answer

A. Within 10 feet of the front or rear and 100 feet behind and ahead of the vehicle.

Explanation

When stopped on an undivided highway, reflectors should be placed within 10 feet of the front or rear and 100 feet behind and ahead of the vehicle. This ensures maximum visibility for other drivers, allowing them to see the stopped vehicle from a safe distance and take appropriate precautions. Placing reflectors within these specified distances helps to alert approaching drivers of the presence of a stopped vehicle, reducing the risk of accidents or collisions.

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5.

What three things add up to total stopping distance?

Road conditions, reaction distance, and braking distance
Perception distance, reaction distance, and braking distance
Braking distance, controlling speed, and reaction distance.

Correct Answer

A. Perception distance, reaction distance, and braking distance

Explanation

The three things that add up to total stopping distance are perception distance, reaction distance, and braking distance. Perception distance refers to the distance a driver travels from the moment they see a hazard until they realize the need to brake. Reaction distance is the distance a driver travels from the moment they decide to brake until they actually start to apply the brakes. Braking distance is the distance a driver travels from the moment they apply the brakes until the vehicle comes to a complete stop. All three of these factors contribute to the total stopping distance.

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6.

If you go twice as fast, will your stopping distance increase by:

Two times
Three times
Four times
Five times

Correct Answer

A. Four times

Explanation

If you go twice as fast, your stopping distance will increase by four times. This is because stopping distance is directly proportional to the square of the speed. When you double your speed, the stopping distance will be four times greater because (2^2 = 4). Therefore, the correct answer is four times.

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7.

Empty trucks have the best braking.

True
False

Correct Answer

A. False

Explanation

Empty trucks do not have the best braking. In fact, empty trucks have less weight and therefore less traction, which can result in poorer braking performance compared to trucks that are fully loaded. The additional weight of a loaded truck helps to improve traction and stability, allowing for better braking capabilities.

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8.

What is hydroplaning?

Driving in the snow
When the tires lose their contact with the road
When you hit a pot hole

Correct Answer

A. When the tires lose their contact with the road

Explanation

Hydroplaning refers to the phenomenon when the tires of a vehicle lose contact with the road surface due to a layer of water. This typically occurs when there is heavy rain or standing water on the road, causing the tires to ride on top of the water rather than gripping the pavement. As a result, the driver may experience a loss of control and steering ability, making it dangerous to drive in such conditions.

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9.

What is black ice?

Dirty snow
Rain and snow mixed
A thin layer of ice clear enough that you can see the road underneath it.

Correct Answer

A. A thin layer of ice clear enough that you can see the road underneath it.

Explanation

Black ice refers to a thin layer of ice that is transparent and clear enough that the road underneath it can be seen. It is called black ice because it often appears as a dark, glossy surface on the road. This type of ice is particularly dangerous because it is difficult to see, making it easy for drivers to lose control of their vehicles.

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10.

If the vehicle ahead of you is smaller than yours, it can probably:

Out-run you.
Stop faster than you can.
Take turns faster than you can.

Correct Answer

A. Stop faster than you can.

Explanation

A smaller vehicle can stop faster than a larger one because it has less mass to slow down. The braking system of a smaller vehicle is designed to handle its weight, allowing it to come to a stop more quickly. In comparison, a larger vehicle requires more distance to stop due to its greater mass. Therefore, if the vehicle ahead of you is smaller than yours, it is likely able to stop faster than you can.

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11.

If you are driving a 30 foot vehicle at 55 mph, how many seconds of following distance should you allow?

Four seconds
Eight seconds
Six seconds

Correct Answer

A. Four seconds

Explanation

When driving a vehicle, it is important to maintain a safe following distance to allow for sufficient reaction time and prevent accidents. The recommended following distance is typically measured in seconds. The correct answer in this case is four seconds. This means that you should allow a time gap of four seconds between your vehicle and the vehicle in front of you, especially when driving a 30-foot vehicle at a speed of 55 mph. This allows you enough time to react to any sudden changes in traffic and helps to ensure a safe driving experience.

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12.

You should decrease your following distance if somebody is following you too closely.

True
False

Correct Answer

A. False

Explanation

Decreasing your following distance when someone is following you too closely is not the correct action to take. In fact, it is recommended to increase your following distance in such a situation to ensure safety on the road. By increasing the distance, you provide yourself with more time to react to any sudden stops or changes in traffic. Therefore, the correct answer is False.

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13.

If you swing wide to the left before turning right another driver may try to pass you on the right.

True
False

Correct Answer

A. True

Explanation

Swinging wide to the left before turning right can create confusion for other drivers on the road. By doing so, you are indicating that you are planning to make a left turn, which may lead another driver to assume that it is safe to pass you on the right. This can be dangerous as it can result in a collision if you suddenly turn right while the other driver is attempting to pass. Therefore, it is important to avoid swinging wide to the left before turning right to prevent potential accidents.

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14.

You should use low beams whenever you can.

True
False

Correct Answer

A. False

Explanation

The statement suggests that low beams should be used whenever possible. However, this is not correct. Low beams should be used in specific situations, such as driving in fog or rain, or when there is oncoming traffic. In other situations, high beams may be more appropriate for better visibility. Therefore, the correct answer is false.

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15.

What should you do before you drive if you are drowsy?

Drink some coffee.
Take some caffeine pills.
Get some sleep before you drive.
None of the above.

Correct Answer

A. Get some sleep before you drive.

Explanation

Before driving if you are drowsy, it is important to get some sleep. This is because drowsiness can impair your ability to focus and react quickly while driving, increasing the risk of accidents. Consuming coffee or caffeine pills may provide temporary alertness but cannot substitute for proper rest. Therefore, the best course of action is to prioritize getting enough sleep before getting behind the wheel.

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2

CDL General Knowledge II

What are two main things to look for ahead?

Quiz Preview

What is the correct way to view the sides and rear?

What does "communicating" mean in safe driving?

Where should your reflectors be placed when stopped on an undivided highway?

What three things add up to total stopping distance?

If you go twice as fast, will your stopping distance increase by:

Empty trucks have the best braking.

What is hydroplaning?

What is black ice?

If the vehicle ahead of you is smaller than yours, it can probably:

If you are driving a 30 foot vehicle at 55 mph, how many seconds of following distance should you allow?

You should decrease your following distance if somebody is following you too closely.

If you swing wide to the left before turning right another driver may try to pass you on the right.

You should use low beams whenever you can.

What should you do before you drive if you are drowsy?