Required CDL Endorsements

Correct!
B. 4.5

Explanation:
There are three things that add up to total stopping distance: perception distance, reaction distance, and braking distance. Braking distance is the distance it takes to stop once the brakes are put on. At 55 mph on dry pavement with good brakes it can take a heavy vehicle about 390 feet to stop, which takes about 4 1/2 seconds.

In the handbook:
2.6.1: Controlling Speed - Stopping Distance

Correct!
B. orange

Explanation:
Hazardous materials are products that pose a risk to health, safety, and property during transportation. Placards are used to warn others of hazardous materials. Placards are signs put on the outside of a vehicle that identify the hazard class of the cargo. A placarded vehicle must have at least four identical placards. They are put on the front, rear, and both sides. Placards must be readable from all four directions. They are at least 10 3/4 inches square, turned upright on a point, in a diamond shape. Cargo tanks and other bulk packaging display the identification number of their contents on placards or orange panels.

In the handbook:
2.24.3: Hazardous Materials Rules For All Commercial Drivers - Lists of Regulated Products

Correct!
D. none of the above

Explanation:
Knowing how to fight fires is important. Drivers who didn't know what to do have made fires worse. Know how the fire extinguisher works. Study the instructions printed on the extinguisher before you need it. Here are some procedures to follow in case of fire. Use the right fire extinguisher. The B:C type fire extinguisher is designed to work on electrical fires and burning liquids. The A:B:C type is designed to work on burning wood, paper, and cloth as well.

In the handbook:
2.21.3: Fires - Fire Fighting

Correct!
B. hazard.

Explanation:
A hazard is any road condition or other road user (driver, bicyclist, pedestrian) that is a possible danger. For example, a car in front of you is headed toward the freeway exit, but the brake lights come on and the driver begins braking hard. This could mean that the driver is uncertain about taking the offramp. The vehicle might suddenly return to the highway. This car is a hazard. If the driver of the car cuts in front of you, it is no longer just a hazard; it is an emergency. You will have more time to act if you see hazards before they become emergencies. In this example, you might make a lane change or slow down to prevent a crash if the car suddenly cuts in front of you. Seeing this hazard gives you time to check your mirrors and signal a lane change. Being prepared reduces the danger. A driver who did not see the hazard until the slow car pulled back on the highway in front of him or her would have to do something very suddenly. Sudden braking or a quick lane change is much more likely to lead to a crash.

In the handbook:
2.8.1: Seeing Hazards - Importance of Seeing Hazards

Correct!
D. Gross Vehicle Weight Rating.

Explanation:
You must understand basic cargo safety rules to get a CDL. If you load cargo wrong or do not secure it, it can be a danger to others and yourself. You are responsible for not being overloaded. Gross Vehicle Weight Rating is the maximum Gross Vehicle Weight specified by the manufacturer for a single vehicle plus its load.

In the handbook:
3.2.1: Weight and Balance - Definitions You Should Know

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