Check your understanding of Module 4, Unit 3. This quiz contains 12 questions. Select one answer for each question. You may retry the quiz.
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At a district-heating interface, primary supply temperature is 72°C and primary return temperature is 48°C. What is the primary Delta T?
For the same heat duty, what happens when Delta T becomes smaller?
A building needs 100 kW. Approximate the required flow at Delta T = 20 K and at Delta T = 10 K using V_m3/h ≈ P_kW / (1.163 × Delta T).
Why is a lower practical return temperature usually beneficial for a district-heating network?
Why should you not diagnose a fault from one low Delta T reading alone?
Which set of observations most strongly suggests bypass flow or hydraulic short-circuiting?
Scenario: Primary supply is 80°C, primary return is 79°C, flow is continuously high and dwelling demand is zero. What is the safest first check?
Which item is a common interface-control cause of high return temperature or excessive flow?
What is the purpose of weather compensation in a building-side heating circuit?
Which sampling interval is most appropriate for investigating DHW draw events or rapid control oscillation?
Scenario: DHW outlet temperature falls below target only between 18:00 and 20:00, and differential pressure at the dwelling connection falls during the same period. What is the best interpretation?
Which sequence best reflects the least-disruptive effective intervention hierarchy?
