By the end of the session, learners in the Level 3 Diploma in Plumbing and Domestic Heating should be able to describe the basic properties of which gases?

• Oxygen, Hydrogen, Nitrogen, Helium

• Air and steam, LPG, Natural gas, Carbon dioxide, Refrigerant gases

• Methane, Ethane, Propane, Butane

• Carbon monoxide, Sulfur dioxide, Chlorofluorocarbons, Ammonia

How many principle gases are there in the building services industry according to the document?

• Four

• Five

• Six

• Seven

Which of the following is NOT listed as one of the principle gases in the building services industry?

• Oxygen

• Steam

• Natural Gas

• LPG

What has caused the decline in the use of steam as a heating method in recent years?

• The introduction of less efficient systems

• The preference for electrical heating systems only

• The development of new, more efficient system designs

• The ban on steam usage for environmental reasons

Which application is NOT mentioned as a current use of steam in the text?

• Combined heat and power applications

• Electricity generation

• Hot water production using large hot water calorifiers

• Refrigeration systems

What is one of the modern uses of steam in district heating systems?

• To cool properties

• To generate electricity and warm properties

• To purify water

• To provide natural gas

What is the most widely used fuel in the UK?

• Coal

• Natural gas

• Biomass

• Solar energy

Natural gas is used for which domestic application?

• Room heaters

• Refrigerators

• Air conditioners

• Washing machines

For what industrial application is natural gas used?

• Machinery lubrication

• Industrial heating and processes

• Metal casting

• Sewage treatment

At what temperatures do refrigerants typically boil?

• At room temperature

• At extremely high temperatures

• At extremely low temperatures, well below 0°C

• Exactly at 0°C