Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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What is the term for a pipe fitting with a male thread on one end and a female thread on the other, shaped to a ninety-degree bend?

Coupling
Adapter
Street Elbow
Union

The correct answer is: Street Elbow

The term for a pipe fitting that features a male thread on one end and a female thread on the other, designed to create a ninety-degree bend, is termed a "Street Elbow." The street elbow allows for a connection between two pipes at an angle, facilitating changes in direction in piping systems while maintaining the flow. This type of fitting is commonly used in plumbing and irrigation systems, making it essential for effectively routing pipes in confined spaces or in layouts that require sharp turns. The other options represent different types of fittings. A coupling is used to connect two pieces of pipe in a straight line without changing the direction. An adapter serves to connect two pipes with different thread types or sizes, while a union is a fitting that allows for easy assembly and disassembly of pipe connections, usually in a straight form, and does not change the direction of flow. Thus, the specific design and threading of the street elbow make it uniquely suited for creating a right angle in piping configurations.