The low-carbon-ready system

1 Typically what temperature difference between the flow and return do you design for a heat pump installation?
A: 12°C
B: 20°C
C: 5°C
D: 15°C
2 What standard is used for calculating radiator heat outputs?
A: EN 554
B: EN 445
C: EN 442
D: EN 767
E: None of the above
3 What is the maximum temperature of a low-carbon-ready heating system
A: 45°C
B: 50°C
C: 35°C
D: 55°C
E: 75°C
4 Without changing the pipe size, if I increase the flow rate and consequently reduce the temperature difference between the flow and return pipework, the pipe velocity and pressure loss increases.
A: True
B: False
5 Which standard is used for correctly designing an underfloor heating system?
A: BS EN 1246
B: BS EN 1265
C: BS EN 1624
D:BS EN 1642
E: None of the above