Sample interview questions: Can you explain your knowledge of different types of pressure gauges used in hydronic systems and their accuracy requirements?
Sample answer:
Types of Pressure Gauges in Hydronic Systems:
- Bourdon tube gauge: Detects pressure using a curved tube that straightens as pressure increases. Moderate accuracy (±2%).
- Diaphragm gauge: Uses a diaphragm to sense pressure, which moves a pointer indicating pressure. High accuracy (±1%).
- Digital pressure gauge: Converts pressure into an electrical signal using a transducer. High accuracy (±0.2%).
- Differential pressure gauge: Measures the pressure difference between two points in a system. Critical for balancing hydronic circuits.
Accuracy Requirements:
- For general pressure monitoring: ±2% accuracy is typically sufficient.
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Source: https://hireabo.com/job/12_0_14/Hydronic%20Technician