80. Why should you use chocks when parking a trailer without spring brakes?

Combination Vehiclesmedium

Aa. Because you don't want the trailer rolling down a hill.

Bb. Because if the air pressure leaks away or down, there will be no brakes.

Cc. Because some states require chocking of trailer wheels.

Detailed Explanation

The correct answer is "b. Because if the air pressure leaks away or down, there will be no brakes.". This is based on federal CDL regulations and safety standards.

Correct Answer: b. Because if the air pressure leaks away or down, there will be no brakes.

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80. Why should you use chocks when parking a trailer without spring brakes?

Detailed Explanation

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