WorksheetsUnit 208 – CH #1
Total questions: 27
Worksheet time: 14mins
What is the primary purpose of a central heating system?
To provide cooling to a building
To provide hot water for domestic use
To heat air and circulate it throughout a building
To heat water and distribute it to radiators
Which of the following is the most common energy source for central heating systems?
Solar power
Electricity
Gas
Coal
Which component is used to circulate hot water in a wet central heating system?
Boiler
Pump
Radiator
Thermostat
What is the role of a thermostat in a central heating system?
To store hot water
To circulate hot air
To monitor and control the temperature
To filter water
In a central heating system, what is the primary function of the heat emitters?
To filter water
To distribute heat to the rooms
To circulate hot water
To store fuel
Which of the following is a common fuel type for a boiler in a central heating system?
Wood
Gas
Oil
All of the above
What does the acronym ‘S-plan’ refer to in central heating systems?
A type of boiler
A system of pipework and controls
A type of radiator
A water filter system
What is the function of a pressure relief valve in a heating system?
To regulate the pressure of the water in the system
To prevent hot water from flowing out of the system
To reduce the power of the boiler
To increase the water flow rate
What does the expansion vessel in a central heating system do?
Absorbs air in the system
Allows for the expansion of water as it heats
Increases the flow of water
Controls the temperature of the water
Which of the following is a common problem with central heating systems?
Leaking radiators
Noisy pipes
Airlocks
All of the above
What is a common way to bleed a radiator?
Use a wrench to tighten the valve
Open the valve to release trapped air
Turn off the pump
Flush the system with water
What does the term ‘wet central heating system’ refer to?
A system that uses water and heat emitters for heat distribution
A system that uses electric heaters
A system that uses steam for heating
A system that uses only hot air
What is the function of a hot water cylinder in a central heating system?
To store hot water for domestic use
To store cold water
To circulate air
To regulate water pressure
Which type of boiler is typically the most energy-efficient?
Conventional boiler
Combi boiler
Back boiler
Solid fuel boiler
What is a ‘combi boiler’?
A boiler that only provides hot water
A boiler that provides both heating and hot water
A boiler that stores hot water
A boiler that runs on coal
What type of system is an 'open vented' central heating system?
A system with a sealed tank
A system where air can enter and leave the system
A system that runs only on gas
A system that uses solar energy
Which of the following would be an indication of a fault in a central heating system?
Cold spots on radiators
Radiators getting too hot
Water is clear and running smoothly
A constant room temperature
What is the typical pressure range for most central heating systems?
0.5 – 1 bar
1 – 2 bar
2 – 3 bar
3 – 4 bar
What is the primary role of a pump in a central heating system?
To distribute heat
To circulate water
To regulate temperature
To heat the water
Which of the following should be done during the annual maintenance of a heating system?
Clean the radiators
Check the pressure of the system
Inspect the boiler
All of the above
21. What is the purpose of the flue in a gas boiler?
To circulate water within the boiler
To vent exhaust gases outside
To control the temperature of the water
To ignite the gas burner
What does 'frost protection' in a central heating system do?
It prevents the boiler from overheating
It keeps the water temperature from dropping too low in cold weather
It helps the system circulate water better
It prevents airlocks
What can happen if the central heating system is not bled regularly?
The pump will fail
Air will get trapped in the system, reducing efficiency
The boiler will overheat
The radiators will burst
Which type of valve is commonly used to control the temperature of individual radiators?
Pressure relief valve
Thermostatic radiator valve (TRV)
Isolation valve
Diverter valve
The role of a diverter valve in a heating system is to:
control the flow of water between heating and hot water circuits
regulate the temperature of the water
increase the pressure in the system
reduce energy consumption
In a sealed heating system, what is used to maintain the system pressure?
Air vent
Expansion vessel
Pressure relief valve
Filling loop
Which of the following systems is the most energy-efficient for heating water in a home?
Gas-fired boiler
Electric immersion heater
Solar water heating system
Open vented system
