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WorksheetsCondensing Boilers Worksheet
Total questions: 19
Worksheet time: 10mins
What is the maximum return temperature at which modern condensing boilers will work in condensing mode?
60 degrees
50 degrees
70 degrees
82 degrees
Why is it necessary to slow the flow of water through each radiator in a modern condensing boiler system?
To increase the pressure in the system
To allow time for the water to cool
To reduce noise from the radiators
To prevent leaks in the pipes
According to the text, what is the typical maximum temperature setting for central heating in most boilers?
50 degrees
65 degrees
82 degrees
21 degrees
Explain why most boilers are installed with their heating and hot water settings at maximum, and discuss one potential drawback of this practice for boiler efficiency.
To ensure the system heats rooms quickly; drawback: increased noise
To meet system design for cold weather and avoid callbacks; drawback: not good for boiler efficiency
To reduce installation time; drawback: higher installation cost
To prevent water leaks; drawback: lower water pressure
At what temperature is it generally sufficient to set your boiler for most of the year, according to the text?
82 degrees
65 degrees
50 degrees
14 degrees
Why does the majority of fuel used in heating come from the initial start up of the radiators?
Because the radiators are already warm
Because the radiators must heat up from room temperature to the desired temperature
Because the boiler is set to maximum capacity
Because the thermostat is always on
According to the text, when does the thermostat stop the boiler?
When the room temperature drops below 14 degrees
When the heating is satisfied
When the boiler is set to 65 degrees
When the radiators are cold
Why does hot water need to be set to 65 degrees only if you have a storage cylinder?
To save energy
To prevent legionella
To make showers hotter
To reduce boiler wear
Explain the process that occurs after the thermostat stops the boiler, based on the text.
The radiators heat up further
The radiators slowly cool to room temperature until the room cools below the desired temperature, then the process starts again
The boiler continues running at low power
The hot water temperature increases
What is the main purpose of weather compensation in a heating system?
To adjust the radiator temperature based on outside temperature
To increase the maximum temperature of hot water
To mix hot water with cold water for safety
To turn the boiler on and off at scheduled times
According to the text, why is it not efficient to heat your hot water to 65 degrees and then mix it with cold water?
It wastes money and fuel
It makes the water too cold
It damages the boiler
It increases the risk of burns
How do most "dumb" thermostats control the boiler?
By turning it on and off according to a schedule
By adjusting the temperature based on outside sensors
By communicating in two directions with the boiler
By setting the radiator temperature automatically
Explain how weather compensation can lead to fuel savings in a heating system.
By keeping radiators warm all day and producing just the right amount of heat, weather compensation avoids the need for excess fuel every time the heating system restarts, thus saving fuel.
By turning the boiler off completely
By increasing the maximum temperature of hot water
By mixing hot and cold water to reach a safe temperature
What is the purpose of the soft start function in a boiler controlled by a thermostat?
To prevent the boiler from firing up at full rate until it is warmed up
To increase the speed at which the room heats up
To keep the boiler running continuously
To cool down the boiler before starting
What is meant by "overshoot" in the context of a thermostat-controlled heating system?
When the room temperature drops below the set point
When the thermostat turns off the boiler but the room temperature continues to rise due to latent heat in the radiators
When the boiler fails to start
When the thermostat is set to a lower temperature than required
Which feature is commonly found in smart thermostats?
Ability to be controlled from a phone
Ability to generate electricity
Ability to cool the room automatically
Ability to work without any power source
How does geofencing in smart thermostats benefit the householder?
It detects the location of the householder and controls the boiler accordingly
It increases the water pressure in the boiler
It automatically repairs the boiler
It reduces the need for radiators
Suppose your thermostat is set to heat the house to 21 degrees at 5 pm, but you haven’t returned home yet. What will a smart thermostat with geofencing likely do?
It will not heat the house until you are close to home
It will heat the house regardless of your location
It will turn off the boiler permanently
It will lower the temperature to 15 degrees
Explain how latent heat in radiators can affect room temperature after the boiler is turned off. (DoK Level 3)
The latent heat in the radiators continues to release heat, causing the room temperature to keep increasing even after the boiler is turned off
The latent heat cools down the room quickly
The latent heat has no effect on room temperature
The latent heat causes the boiler to restart immediately
