Domestic hot water (Components) practice test 1

What are the main components of a domestic hot water system?

• Water heater, hot water storage tank, pipes.

• Refrigerator, microwave, and dishwasher

• Toilet, bathtub, and shower

• Air conditioner, radiator, and chimney

Explain the function of a water heater in a domestic hot water system.

• It cools the water for domestic use.

• It heats the water for domestic use.

• It filters the water for domestic use.

• It pumps the water for domestic use.

Describe the role of a thermostat in a hot water system.

• Turns the water into steam

• Cleans the water

• Controls the flow of water

• Regulates the temperature of the water

What are the different types of hot water storage tanks used in domestic systems?

• Electric tanks, gas tanks, and solar tanks

• Single coil tanks, double coil tanks, and triple coil tanks

• Metal tanks, plastic tanks, and glass tanks

• Vented cylinders, unvented cylinders, and thermal stores

Explain the process of heat transfer in a hot water system.

• Reflection

• Convection

• Absorption

• Transmission

What are the common problems associated with hot water systems?

• Broken pipes

• Leaks, sediment buildup, thermostat malfunctions

• Faulty light switches

• Clogged drains

Discuss the importance of insulation in a hot water system.

• Insulation increases the risk of overheating

• Insulation is only important in cold water systems

• Insulation has no impact on energy efficiency

• Insulation helps to reduce heat loss and improve energy efficiency.

How does a recirculation system work in a domestic hot water system?

• It only circulates cold water through the pipes

• It continuously circulates hot water through the pipes to ensure instant hot water at the tap.

• It shuts off the hot water supply completely

• It heats the water only when the tap is turned on

What are the safety measures to be followed while working with hot water systems?

• Using bare hands to handle hot water

• Leaving the hot water system unattended while it is in use

• Wearing shorts and flip-flops while working with hot water

• Wearing appropriate protective gear such as gloves and goggles, ensuring proper ventilation, and being cautious of hot surfaces and steam.

Explain the concept of energy efficiency in hot water systems.

• Energy efficiency in hot water systems means using energy only during peak hours.

• Energy efficiency in hot water systems means using more energy to provide the same amount of hot water.

• Energy efficiency in hot water systems means using less energy to provide the same amount of hot water.

• Energy efficiency in hot water systems means using the same amount of energy to provide less hot water.