GMJ 6035 Hot water questions

What is the typical temperature range for domestic hot water systems?

• 30-40°C

• 45-60°C

• 65-80°C

• 85-100°C

Which of the following is a common source of hot water heating in residential buildings?

• Solar panels

• Gas boilers

• Electric immersion heaters

• All of the above

What is the primary purpose of a thermostatic mixing valve (TMV)?

• To increase water pressure

• To prevent scalding by mixing hot and cold water

• To filter impurities from the water

• To reduce energy consumption

Legionella bacteria thrive in water temperatures between:

• 0-10°C

• 20-45°C

• 50-60°C

• 70-100°C

What is the purpose of an expansion vessel in a hot water system?

• To store extra water supply

• To absorb excess pressure due to thermal expansion

• To filter water before heating

• To improve water quality

What type of pipe material is commonly used in domestic hot water systems?

• Copper

• Lead

• Asbestos

• Wood

What is the main function of a hot water cylinder in an indirect system?

• To generate heat

• To store and distribute hot water

• To cool down hot water

• To separate impurities from water

Why is insulation important for hot water pipes?

• To prevent freezing

• To reduce heat loss and improve efficiency

• To improve water pressure

• To prevent leaks

A combi boiler provides: a) Hot water only b) Central heating only c) Both hot water and central heating

• Hot water only

• Central heating only

• Both hot water and central heating

Which type of heating system uses solar energy to heat water?

• Biomass boiler

• Thermal solar panels

• Gas-fired system

• Oil-fired system