Texas CNG(Compressed Natural Gas) Driver Practice

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Prepare for the Texas CNG Driver Test with comprehensive quizzes and detailed explanations. Get equipped with essential knowledge to ace your certification exam efficiently!

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!

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What is the purpose of pressure relief valves in a residential facility?

To allow gas to escape without pressure
To withstand vapor discharge pressure
To maintain high pressure within systems
To prevent gas from flowing out

The correct answer is: To withstand vapor discharge pressure

The correct choice emphasizes the function of pressure relief valves in a residential facility, which is critical for safety and operational integrity. Pressure relief valves are designed to open and relieve pressure when it reaches a predetermined level, thereby protecting the system from potential overpressure situations that could lead to leaks or ruptures. By withstanding vapor discharge pressure, they act as a safety mechanism to ensure that pressure does not exceed safe limits, allowing any excess gas to escape safely to the atmosphere. This function is vital in maintaining system integrity and preventing hazardous situations. The other options highlight functions that do not accurately represent the primary role of pressure relief valves. For instance, allowing gas to escape without pressure or maintaining high pressure contradicts the safety purpose these valves serve. They aren't designed to prevent gas flow, but rather to regulate it during an overpressure situation. Thus, the understanding of the correct functionality is essential, especially in contexts like residential facilities where safety measures are paramount.