WorksheetsCentral Heating Systems Quiz
Total questions: 51
Worksheet time: 26mins
What is the minimum ErP efficiency percentage required for all boilers from 6 April 2018 according to the Boiler Plus regulations 2018?
85%
92%
95%
90%
As per the Boiler Plus regulations 2018, what must all installations have fitted?
Time and cost controls
Time and temperature controls
Time and energy controls
Time and efficiency controls
Which of the following is NOT one of the four additional requirements for combi boilers to comply with Boiler Plus regulations 2018?
Load compensation
Weather compensation
Smart control
Carbon monoxide detector
What does FGHR stand for in the context of Boiler Plus regulations 2018?
Flue gas heat recovery
Fuel gas heat retention
Flue gas humidity reduction
Fuel gas humidity recovery
What is the purpose of smart control in the Boiler Plus regulations 2018?
To reduce the water usage in boilers
To allow full automation and enhanced efficiency
To control the gas emission levels
To monitor the fuel consumption
What should the three-port valve in the Y-Plan system be connected to?
The AB port, which is marked on the valve.
Directly to the electric actuator.
The nearest heat source.
The bypass valve.
Where must the room thermostat be positioned in the heating circuit?
In the warmest room of the house.
Next to the boiler.
Positioned in the coolest room (normally the hallway) away from heat sources and cold draughts.
Outside the house for better temperature measurement.
What is required to control the hot water temperature in the hot water circuit?
A bypass valve.
A room thermostat.
A cylinder thermostat placed one-third up from the base of the cylinder.
Time control programming.
What is the purpose of a bypass in the central heating system?
To control the temperature of the hot water.
To provide individual use of hot water and heating circuits.
To control the flow from the boiler.
An automatic bypass valve is required.
Where should a frost/pipe thermostat be provided in the central heating system?
In the hottest part of the system.
Where parts of the system are in vulnerable positions.
Next to the three-port valve.
Inside the boiler.
What must control the hot water temperature in the S-plan system?
A room thermostat
A cylinder thermostat placed one-third up from the base of the cylinder
A two-port zone valve
A time clock
What is required in the S-plan system to allow individual use of hot water and heating circuits?
A bypass valve
A frost/pipe thermostat
A programmer
A second time clock
Where should room thermostats controlling downstairs and upstairs heating circuits be installed in the S-plan system?
Near the heating circuit
At 1.5m from floor level
One-third up from the base of the cylinder
In vulnerable positions of the system
What must be provided where parts of the S-plan system are in vulnerable positions?
A two-port zone valve
A time control
A heating circuit
A frost/pipe thermostat
What is necessary if the S-plan system is to be zoned?
A single zone valve
A cylinder thermostat
Individual room thermostats
An automatic bypass valve
What is the purpose of a boiler interlock in CH systems?
To allow the boiler to fire up at any time
To prevent the boiler from firing up when it is not required
To increase the efficiency of older systems
To serve as a single control device
Which of the following is NOT a 'boiler interlock' control that may prevent the boiler from operating until safe to do so?
Room thermostat
Motorised valve microswitch
Flow switch
Cylinder thermostat
Where should room thermostats be situated according to the text?
On an outside wall
1.5m up a wall and approximately 3m away from a heat source
Directly above a heat source
On the floor near a window
What types of room thermostats can be installed according to customer requirements?
Only basic bi-metallic type
Only digital type
Basic bi-metallic, programmable, Wi-Fi, app-activated and digital types
Only programmable types
What is a recent advancement in room thermostat technology mentioned in the text?
Thermostats that can be controlled remotely
Thermostats that adjust according to indoor humidity levels
Thermostats that control flow temperatures according to outdoor temperatures
Solar-powered thermostats
Where are cylinder thermostats typically situated on a hot water cylinder?
At the bottom
One-third of the way up
At the top
Halfway up
What is the common maximum setting for a cylinder thermostat?
40°C
50°C
60°C
70°C
Cylinder thermostats can be linked to which of the following?
Zone valve only
Three-port valve only
Both zone valve and three-port valve
Neither zone valve nor three-port valve
What type of mechanisms can cylinder thermostats use to operate?
Bi-metallic strip only
Volatile liquid only
Gas type only
Bi-metallic strip, volatile liquid or gas type
What does the boiler thermostat control?
The temperature of the room
The temperature of the primary water
The temperature of the appliance itself
The temperature of the outside environment
What do older appliances use to operate or turn off the appliance when temperatures require?
Thermistors
Potentiometers
Phial type on/off boiler thermostats
Digital sensors
What do modern appliances rely on to read the temperature and adjust the required set point?
Phial type on/off boiler thermostats
Digital sensors
Thermistors and potentiometers
Mechanical valves
How do thermistors work in the context of a boiler thermostat?
They cool down the appliance when it gets too hot
They increase the temperature when it gets too cold
They determine the temperature and alter resistance to set the appliance's operation
They regulate the water flow based on the temperature
What is the purpose of a programmer in a domestic heating system?
To allow manual control of the heating system only
To allow independent timed control of both the hot water and the central heating
To provide a permanent override of the heating system
To control the lighting system in a property
Where are programmers commonly situated in a property?
In the bathroom
In the living room
In the kitchen or airing cupboard
Outside the property
What feature do programmers often have to allow the heating system to operate outside the programmed timings?
A lock feature
A boost or override button
A power saving mode
A remote control function
What is the purpose of incorporating frost thermostats and pipe thermostats into a system?
To increase the efficiency of the heating system
To stop vulnerable parts of the system from freezing
To reduce the overall cost of the heating system
To monitor the temperature of the water in the system
What should frost thermostats and pipe thermostats be set to in order to function properly?
Between 0°C and 3°C
Between 3°C and 5°C
Between 5°C and 10°C
Between 10°C and 15°C
Where is the frost thermostat positioned in a heating system?
In the boiler
In the most vulnerable areas
Outside the building
Near the water supply
What action do the frost thermostat and pipe thermostat initiate when activated?
They shut down the heating system
They activate the air conditioning system
They activate the circulator and boiler briefly to warm up the system water
They sound an alarm to indicate potential freezing
What does home automation allow in terms of device connectivity within a home?
Connection through a central hub using Bluetooth
Interconnectivity of devices using a central hub connected to Wi-Fi
Connection of devices using individual hubs for each appliance
Interconnectivity of devices without using any central hub or Wi-Fi
What are the recent advancements in home automation systems designed to incorporate?
Commercial-style BMS technologies for office buildings
Residential-style BMS technologies for domestic dwellings
Commercial-style BMS technologies for domestic dwellings
Industrial-style BMS technologies for factories
What features do home automation apps now include to enhance system efficiency?
Weather compensation and manual start control
Weather compensation and optimum start control
Climate adaptation and automatic start control
Climate adaptation and manual start control
What is the purpose of the thermistor-type sensor in weather compensation control approach?
To measure the humidity levels inside the house
To look at the outside air temperature and adjust the flow temperature for accurate room temperature control
To detect the presence of individuals in the room for temperature adjustment
To control the water pressure in the heating system
Where should the thermistor-type sensor be placed for weather compensation?
In direct sunlight
On the side of the house least subject to direct sunlight
Inside the house near a window
In the coldest area of the house
What does the 'compensation curve' in a weather compensation control system do?
It adjusts the indoor lighting based on the time of day
It controls the water flow in the plumbing system
It adjusts the flow temperature to allow accurate room temperature control
It measures the external noise levels to adjust the indoor environment
What is the purpose of self-learning software in heating systems according to the optimum start control concept?
To reduce the energy consumption by starting the heating at the latest possible time
To identify the most efficient start time for the heating to reach a set temperature by the occupancy time
To increase the heating temperature beyond the required set point
To maintain a constant temperature throughout the day
How long before the expected arrival time does the self-learning software start the central heating to reach 21°C when the outside temperature is 7°C?
30 minutes before
60 minutes before
90 minutes before
120 minutes before
What is the potential benefit of using optimum start control in heating systems?
Increased wear and tear on the heating system
Potential energy saving
Constant heating regardless of occupancy
Delayed start of heating every day
What is the main purpose of the V4073A component in the Honeywell control schematic Y-plan?
To act as a time controller
To provide electrical power to the system
To function as a mid-position zone valve
To regulate room temperature
Which component is responsible for controlling the room temperature in the Honeywell control schematic Y-plan?
T6360B Room Stat
L641A Cylinder Stat
V4073A Mid Position Zone Valve
Boiler
In the Honeywell control schematic Y-plan, which component is directly connected to the boiler for operational control?
Time Controller
Pump
Room Stat
Cylinder Stat
What type of control schematic is shown in the image?
W-plan
Y-plan
S-plan
X-plan
What is the power supply specification for the control system in the schematic?
120V 60Hz
230V 60Hz
230V 50Hz
110V 50Hz
Which component in the schematic is labeled as 'BOILER'?
Pump
Time Controller
Motorized Valve
Boiler
What is the label for the component connected to terminals 1 and 2 in the 'TIME CONTROLLER'?
HW HTG
MOTOR
PUMP
CYLINDER STAT.
