Which of the following is included in the list of gases that learners will understand the properties of by the end of the session?

• Oxygen

• LPG

• Nitrogen

• Helium

Which gas is NOT mentioned as one of the gases whose properties will be covered in the session?

• Air and steam

• Natural gas

• Carbon dioxide

• Hydrogen

Why is it important for learners in Plumbing and Domestic Heating to understand the properties of refrigerant gases?

• Because refrigerant gases are used in electrical wiring

• Because refrigerant gases are essential for heating and cooling systems

• Because refrigerant gases are only used in cooking appliances

• Because refrigerant gases are not used in plumbing at all

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

• Oxygen

• Air

• Steam

• LPG

According to the learning material, how many principal gases are identified in the building services industry?

• Four

• Six

• Five

• Seven

Which gas from the list is commonly used as a fuel in domestic heating systems?

• LPG

• Carbon dioxide

• Refrigeration gases

• Steam

If a building services engineer is working with a gas used for cooling systems, which principal gas from the list are they most likely dealing with?

• Refrigeration gases

• Natural gas

• Steam

• Air

What is the primary use of air in warm-air heating systems?

• To cool the air in the property

• To distribute warm air by means of a fan

• To increase water pressure

• To remove carbon dioxide from the air

Which of the following is a use of high-pressure air in plumbing and heating activities?

• To heat water

• To clear blocked drains

• To cool radiators

• To lubricate pipes

How is air used in the testing of water and gas pipework installations?

• It is used to heat the pipes

• It is used to pneumatically pressure test the installations

• It is used to clean the pipes

• It is used to lubricate the joints