Answer :
Final answer:
The true statement regarding the use of nitrogen is that a nitrogen tank must be outfitted with a pressure regulator. Nitrogen is used in a variety of situations, not just in deep vacuum systems or fully charged HVACR systems. It's important to handle nitrogen safely by using the appropriate equipment.
Explanation:
Understanding the Use of Nitrogen
Nitrogen is widely used in various applications, particularly in HVACR systems, where it is essential for safely testing and maintaining the integrity of systems. The following statements regarding the use of nitrogen can be evaluated for their correctness:
- A. The nitrogen tank must be outfitted with a pressure regulator. This is true, as a pressure regulator helps to control the pressure of nitrogen being released, ensuring safe and efficient usage.
- B. Nitrogen must only be added to systems that are in a deep vacuum. This statement is false; nitrogen can be used in various situations, not solely those involving deep vacuum conditions.
- C. Nitrogen must only be added to fully charged HVACR systems. This is also false; nitrogen is often used for leak testing or purging applications, regardless of the system's charge state.
- D. Dry nitrogen is a volatile gas that follows a pressure/temperature relationship. While nitrogen does follow a pressure/temperature relationship, referring to it as 'volatile' may be misleading; rather, it is an inert gas at room temperature.
Given the evaluations, the correct answer is A: the nitrogen tank must be outfitted with a pressure regulator for safe and effective use.
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