CHAPTER 4 MEU

What is the primary purpose of a domestic water heating system?

• To store and distribute cold water

• To heat water for household activities like bathing and washing

• To increase water pressure in plumbing systems

• To filter impurities from water

Which type of water heater stores hot water in an insulated tank for later use?

• Storage tank water heater

• Tankless water heater

• Immersion heater

• Heat pump water heater

What is another term for a tankless water heater?

• Hot water reservoir

• Instantaneous or demand water heater

• Electric immersion heater

• Thermal storage unit

How does a heat pump water heater generate hot water?

• By using solar panels to convert sunlight into heat

• By extracting heat from surrounding air and transferring it to water

• By burning propane gas in an insulated chamber

• By heating water directly using an electric heating coil

What is the primary function of an immersion heater?

• To transfer heat from one fluid to another

• To store large amounts of hot water

• To heat water directly within a tank using an electric element

• To regulate water flow within a heating system

Which type of immersion heater has a heating element placed directly in the water?

• Indirect immersion heater

• Direct immersion heater

• Heat pump water heater

• Storage water heater

What is the advantage of a tankless water heater over a storage tank water heater?

• It requires a larger installation space

• It provides hot water on demand without storing it

• It has higher standby heat losses

• It is more difficult to maintain

Which factor is most important when determining water heater size for a household?

• The number of electrical outlets in the home

• The peak hot water demand during usage periods

• The type of plumbing materials used

• The outdoor temperature during winter

In residential water heating, what does FHR (First Hour Rating) represent?

• The time needed to heat water to boiling

• The amount of hot water available in one hour of peak demand

• The size of the heater’s storage tank

• The efficiency of the heating element

How can the recovery rate of a gas-fired water heater be estimated?

• By multiplying the burner input rating by 0.0009

• By dividing the water temperature by the flow rate

• By measuring the total tank capacity

• By using a heat exchanger efficiency formula