MCC-NH Gas Fitters Practice Exam

Where are two potential locations for a drip installation in gas piping systems?

1. At the outlet of the meter set or at the inlet of the first regulator

2. At the outlet of the second stage regulator or at the outlet of the meter set

3. At the junction of the gas line and the appliance

4. At any location along the main gas pipeline

The correct answer is: At the outlet of the second stage regulator or at the outlet of the meter set

In gas piping systems, installing a drip pot or trap is crucial for removing any condensation or liquid that may accumulate, ensuring the efficiency and safety of the system. The two ideal locations for a drip installation are at the outlet of the second stage regulator and at the outlet of the meter set. The outlet of the second stage regulator is an optimal location because this is where gas is reduced to the final pressure before entering the customer's system. This point is where any moisture that has condensed during the gas pressure reduction can be collected. Additionally, at the outlet of the meter set, the gas exits the meter into the service line that supplies the building. This is another key point where condensation could form, capturing any liquid gas that may be present before it reaches the appliances. These locations are strategically chosen based on the likelihood of moisture accumulation and the necessity of removing it to prevent operational issues and potential damage to appliances that rely on natural gas. In contrast, the other options presented do not align with typical best practices for drip installations, as they do not cater to key points where liquid accumulation is most probable.