Texas CNG(Compressed Natural Gas) Driver Practice

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Enhance your skills with the Texas CNG Driver Test. Use flashcards and multiple choice questions, complete with hints and explanations. Prepare effectively for your exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Which of the following statements is true regarding DOT cylinders?

They can be operated over 125% of marked service pressure.
They must not exceed 125% of marked service pressure.
They are not subject to any pressure regulations.
They must be completely void of pressure when not in use.

The correct answer is: They must not exceed 125% of marked service pressure.

The statement that they must not exceed 125% of marked service pressure is accurate due to safety regulations established by the Department of Transportation (DOT) regarding the use and handling of high-pressure vessels such as cylinders. This regulation is in place to prevent over-pressurization, which can lead to dangerous situations including cylinder failure or rupture, posing risks to both personnel and property. The maintenance of pressure within these safety limits is critical. The design and testing of DOT cylinders consider various factors, ensuring that they can safely withstand their intended pressures. Exceeding the 125% threshold compromises the structural integrity of the cylinder and endangers safe operation. In contrast to this correct statement, the other options reflect misconceptions about cylinder usage and safety norms. For instance, operating above this threshold is hazardous, and there are comprehensive regulations governing the pressure limits of these cylinders. Therefore, it is essential to adhere to established guidelines to maintain safety standards in transporting and using compressed gases.