Sample interview questions: Can you explain your knowledge of different types of expansion joints used in hydronic systems?
Sample answer:
Types of Expansion Joints in Hydronic Systems
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Slip expansion joints: Allow for axial movement by sliding one pipe over another, connected by a packing gland.
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Bellows expansion joints: Flexible metal bellows welded to pipe ends, allowing for axial, lateral, and angular movement.
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Diaphragm expansion joints: Use a rubber or synthetic diaphragm to provide axial and lateral movement, while preventing leakage.
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Toroidal expansion joints: Spherical-shaped joints made of a flexible material, allowing for multidirectional movement.
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Canister expansion joints: Contain flexible bellows or toroidal joints within a metal casing, providing additional support and protection.
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Braided expansion joints: Use a flexible braided metal over a core pipe, allowing for axial and lateral movement.
Knowledge Demonstrated:
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Source: https://hireabo.com/job/12_0_14/Hydronic%20Technician