Answer :

Final answer:

The maximum pressure drop allowed across a Double Check Valve Assembly (DCVA) is typically set at 2 psi. This standard ensures the efficient operation of the assembly and prevents undue back pressure in water supply systems. Thus the correct answer is option b) 2 psi.

Explanation:

The question pertains to the maximum pressure drop allowed across a Double Check Valve Assembly (DCVA). While the question doesn't provide a direct reference to specific standards or regulations, typical engineering practices and standards such as those from the American Water Works Association (AWWA) or other relevant bodies generally dictate these parameters. For DCVAs, the maximum pressure drop is commonly set at 2 psi (pounds per square inch). This parameter is crucial to ensure that the DCVA operates efficiently, without causing undue back pressure that could impede the normal flow or operation of water supply systems. Understanding these limits is essential for engineers and technicians when designing, installing, or troubleshooting backflow preventers including DCVA to protect water supplies from contamination and backflow.

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