Massachusetts Plumbers Journeyman Practice Exam 2026 - Free Plumber Journeyman Practice Questions and Study Guide

The correct choice is to use a flanged collar, rubber ring gasket, and securing bolts at every mechanical joint in cast iron or ductile iron pipe. This method provides a reliable and effective seal that accommodates the thermal expansion and contraction of the materials while ensuring a strong connection that can withstand internal pressures.

Using a flanged collar allows for easy disassembly and maintenance, which is vital in plumbing systems, where repairs may be necessary. The rubber ring gasket serves as a flexible barrier that helps prevent leaks and maintains the integrity of the connection, even under varying conditions. Securing bolts provide the necessary clamping force to keep the joint tight and leak-proof.

Other connection methods may not provide the same level of flexibility, maintenance ease, or sealing effectiveness that is necessary in mechanical joints for these types of pipes, making the selected option the most appropriate choice for this application.