Renewables

Which item is not a key component for a solar thermal system?

• Collector

• Differential controller

• Pressure regulating valve

• Hot water cylinder

What chemical do heat pumps contain?

• Refrigerant

• Acidic vapour

• Mild acid

• Coolant

Which one of the systems below is not connected to a ground source heat pump?

• Horizontal ground loop

• Controlled ground loop

• Vertical ground loop

• Slinky

What gas is released from fossil fuels when burned?

• Oxygen

• Carbon dioxide

• Hydrogen

• Nitrogen

Which type of solar collector is more efficient but more expensive?

• Flat plate collector

• Evacuated tube

• Oval plate collector

• Extended tube

What is meant by the term ‘heat-led’ when referring to a micro combined heat and power system?

• More heat is used for heat than to produce electricity

• More heat is used to produce electricity than to provide heat

• More heat is wasted when producing electricity

• The heat must be at a higher temperature when producing electricity

Which item does an air source heat pump contain?

• Temperature differential controller

• Collector plate

• Condenser

• Heat sink

What does a differential temperature controller do?

• It energises the collector

• It activates the pump when there is enough heat

• It transfers the heat in the cylinder

• It governs the heat intake from the sun

Which one of these is a benefit from an air source heat pump?

• High efficiency

• Quiet to run

• Low installation costs

• No chance of freezing

When using a heat pump, which factor is important?

• Daylight hours

• Eco-efficiency of temperature

• Coefficient of performance

• Efficiency of material