WorksheetsCentral Heating Quiz
Total questions: 20
Worksheet time: 10mins
Why should full gravity systems no longer be installed?
They are too expensive
They are outdated
They are too small
They are too complex
What type of pipework is used in full gravity systems?
Small-diameter pipework
Medium-diameter pipework
Large-diameter pipework
Flexible pipework
Where might you still find full gravity systems?
In new buildings
In older properties
In commercial buildings
In industrial plants
What happens to the pipework in full gravity systems?
It rises from the heat source
It falls from the heat source
It remains level
It is buried underground
What type of hot water cylinders are described as old and rarely seen now?
Double feed
Single feed or Primatic
Electric
Solar
What type of system is a single feed or Primatic hot water cylinder?
Pumped system
Gravity only system
Electric system
Solar system
What happens if you try to convert a single feed or Primatic system to pumped?
It becomes more efficient
It will work perfectly
The air lock will be lost
It will save energy
What temperature drop is achieved over the system in a one-pipe gravity system?
5ºC
10ºC
15ºC
20ºC
Which component in the one-pipe gravity system is responsible for circulating the water?
Boiler
Time clock
Central heating circulating pump
Feed and expansion cistern
What is the diameter of the primary flow pipe in the one-pipe gravity system?
15mm
22mm
28mm
35mm
In the one-pipe gravity system, what is the purpose of the time clock?
To control the heating schedule
To measure water temperature
To regulate water pressure
To monitor water levels
What could happen to the boiler in a one-pipe gravity system?
Boiler could cycle
Boiler remains constant
Boiler is highly efficient
Boiler is always off
What is the efficiency level of boilers connected to one-pipe gravity systems?
High efficiency
Low efficiency
Medium efficiency
Variable efficiency
What type of circulation does the two-pipe semi-gravity system use for the hot water circuit?
Pumped circulation
Gravity circulation
Manual circulation
Electric circulation
In a two-pipe semi-gravity system, how are the flow and return waters managed?
They are mixed together
They are kept separate
They are alternated
They are recycled
What does the room stat control in a two-pipe semi-gravity system?
The temperature of the hot water
The flow of water
The pump
The heat emitters
Why is the hot water often very hot in a two-pipe semi-gravity system?
It has a separate control
It has no control
It is mixed with cold water
It is constantly circulated
What is the title of the diagram shown in the image?
Two-pipe semi-gravity – pipework layout
Single-pipe gravity – pipework layout
Three-pipe semi-gravity – pipework layout
Two-pipe full-gravity – pipework layout
What is the primary function of the boiler in the diagram?
To heat the water
To control the pump
To vent the system
To supply water
Why might a two-pipe semi-gravity system be preferred for heating?
It is not compliant with building regulations
It is quicker when heating up
It has limited heat control
It causes boiler cycling
