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Module 4 – Multiple Choice Questions

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Module 4 – Multiple Choice Questions

Module 3 – Multiple Choice Questions

Quiz

Module 3 – Multiple Choice Questions

Quiz

Published by platformdev on March 12, 2026

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Question 1 of 25

1. Question

1. What does the “Source-to-Sink” nomenclature (e.g., A2W) represent in heat pump classification?

The energy source and the distribution medium
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The electrical voltage and compressor type
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The refrigerant pressure and flow rate
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The installation location and noise level
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Question 2 of 25

2. Question

2. Which heat pump type extracts heat from outdoor air and delivers it to water?

A2A
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B2W
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W2W
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A2W
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Question 3 of 25

3. Question

3. Which environmental medium usually provides the most stable temperature conditions?

Outdoor air
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Exhaust air
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Indoor air
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Groundwater or surface water
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Question 4 of 25

4. Question

4. Which construction type contains the entire refrigerant circuit sealed inside the unit?

Split system
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Exhaust air
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Indoor air
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Groundwater or surface water
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Question 5 of 25

5. Question

5. Which heat pump configuration is commonly used in single-family homes (3–15 kW)?

A2A split or A2W monobloc
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W2W high-temperature industrial system
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District heating heat pump
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Large cascade industrial heat pump
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Question 6 of 25

6. Question

6. What is the main objective of the pre-installation site review?

Adjust the refrigerant charge
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Increase compressor efficiency
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Identify risks and verify site compatibility
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Configure the electronic controller
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Question 7 of 25

7. Question

7. Which factor must be evaluated when analysing access routes during site inspection?

Internet connectivity
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Corridor and doorway dimensions
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Building colour scheme
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Furniture layout
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Question 8 of 25

8. Question

8. Why is acoustic assessment important for air-source heat pump installations?

To improve refrigerant circulation
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To reduce electrical consumption
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To improve airflow through the condenser
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To ensure compliance with local noise regulations
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Question 9 of 25

9. Question

9. What is the main purpose of a condensate drainage system?

To store refrigerant
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To cool electrical components
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To remove water generated during operation
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To regulate compressor pressure
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Question 10 of 25

10. Question

10. What is the typical recommended water seal depth for condensate traps?

10–20 mm
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30–40 mm
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150–200 mm
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50–100 mm
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Question 11 of 25

11. Question

11. Which instrument is used to verify deep vacuum levels during system evacuation?

Electronic micron gauge
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Clamp meter
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Pressure relief valve
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Flow meter
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Question 12 of 25

12. Question

12. Which material is most commonly used for refrigerant piping?

Steel
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PVC
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Refrigeration-grade copper
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Aluminum
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Question 13 of 25

13. Question

13. Why should refrigerant pipes be deburred after cutting?

To reduce insulation thickness
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To prevent turbulence and contamination
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To increase pipe flexibility
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To reduce pressure drop
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Question 14 of 25

14. Question

14. What slope is recommended for suction lines to assist oil return?

1–2% toward the compressor
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5–10% toward the evaporator
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No slope is required
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10–15% toward the condenser
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Question 15 of 25

15. Question

15. Which insulation material is commonly used for refrigerant pipes?

Fiberglass boards
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Polyurethane foam panels
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Elastomeric foam insulation
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Mineral wool
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Question 16 of 25

16. Question

16. What is the recommended buffer tank size in hydronic heat pump systems?

5–10 litres per kW
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15–25 litres per kW
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30–40 litres per kW
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50–60 litres per kW
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Question 17 of 25

17. Question

17. Which heat emitter is most compatible with heat pumps due to its low operating temperature?

Steam radiators
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Electric convectors
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High-temperature radiators
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Underfloor heating
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Question 18 of 25

18. Question

18. Which hydraulic component prevents reverse water flow in the system?

Expansion vessel
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Three-way valve
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Check valve
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Circulation pump
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Question 19 of 25

19. Question

19. What is the maximum recommended voltage drop between the electrical origin and the heat pump?

10%
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5%
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15%
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20%
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Question 20 of 25

20. Question

20. Which protective device is typically used to handle motor inrush current in HVAC equipment?

Type A MCB
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Type B MCB
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Type D MCB
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Type C MCB
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Question 21 of 25

21. Question

21. During commissioning, what vacuum level should be reached before charging refrigerant?

≤ 2000 microns
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≤ 1500 microns
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≤ 1000 microns
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≤ 500 microns
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Question 22 of 25

22. Question

22. Which parameters are commonly checked to verify refrigeration performance during commissioning?

Pipe insulation thickness
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Superheat and subcooling
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Outdoor temperature only
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Compressor colour
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Question 23 of 25

23. Question

23. What is the goal of preventive maintenance?

Replace components frequently
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Increase electrical consumption
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Detect performance changes compared with baseline operation
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Reduce system refrigerant charge
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Question 24 of 25

24. Question

24. How should outdoor heat-pump coils be cleaned?

With sandblasting equipment
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Using acid cleaning chemicals
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With high-pressure jet washing
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With low-pressure water from inside outward
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Question 25 of 25

25. Question

25. What does the Lockout/Tagout (LOTO) procedure ensure?

Proper refrigerant charging
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Correct compressor rotation
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Efficient hydraulic balancing
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Safe electrical isolation during maintenance
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