WorksheetsUNIT 12 LESSON 2 Electrical Circuits and Systems Quiz
Total questions: 63
Worksheet time: 39mins
By the end of the session, learners should be able to describe the components of which type of circuit?
Hydraulic circuit
Pneumatic circuit
Electrotechnical circuit
Mechanical circuit
What should learners be able to describe about electrical power circuits?
What aspect of lighting circuits are learners expected to understand?
What should learners be able to describe about data networks in BSE systems?
(a)
What is the focus of learning about heating systems in this session?
(a)
What topic related to electrical appliances is covered in this session?
What is the function of the component labeled as "Protection device (fuse)" in an electrotechnical circuit?
To provide power to the circuit
To control the flow of electricity
To protect the circuit from overcurrent
To complete the electrical circuit
What is the role of the "Control device (switch)" in the circuit diagram?
To protect the circuit from overcurrent
To provide a path to ground
To control the flow of electricity
To store electrical energy
Which component in the circuit diagram is the power source?
Fuse
Switch
Battery
Lamp
What is the purpose of the "Ground path" in the electrotechnical circuit?
To store excess electricity
To provide a return path for electrical current
To illuminate the working device
To switch the circuit on and off
What is the purpose of a fuse or circuit breaker in an electrical circuit?
To increase the flow of current
To act as a load
To cut off supply if too much current flows
To control the direction of current
What is referred to as the 'load' in an electrical circuit?
The switch used to turn the circuit on and off
The device that needs current to operate
The source of supply, AC or DC
The conductors through which current flows
What is the term used for the switch that turns the circuit on and off?
Circuit protection
Load
Circuit control
Cable
What are conductors embedded in a protective sheathing called?
Load
Circuit breaker
Cable
Circuit control
What is an electrical power circuit used for?
To light up electrical components
To distribute power for utilisation elsewhere, such as sockets, cookers, showers, industrial plant, fans, etc.
To generate electrical power
To store electrical energy
What is the most common power circuit in the majority of installations?
Parallel circuit
Series circuit
Radial circuit
Ring final circuit
What is a common rule for domestic installations involving ring circuits?
There should be a separate ring circuit for every 50m² of floor.
There should be a separate ring circuit for every 100m² of floor.
There should be a separate ring circuit for every 150m² of floor.
There should be a separate ring circuit for every 200m² of floor.
How does a radial circuit differ from a ring final circuit?
A radial circuit has a looped shape as opposed to a ring.
A radial circuit offers the same level of distribution as a ring circuit.
A radial circuit starts and ends at different points.
A radial circuit is not used in power installations.
What type of electrical circuit is depicted in the diagram?
Star circuit
Series circuit
Ring final circuit
Parallel circuit
What type of electrical circuit is depicted in the diagram?
Series circuit
Parallel circuit
Radial circuit
Ring circuit
What type of cable is usually involved in three-phase power distribution in the industry?
Copper unshielded cable
Steel wire armoured (SWA) cable
Aluminum overhead cable
Fiber optic cable
For what voltage motors are all three phases directly connected to the distribution system according to the document?
230V
110V
400V
500V
When 230V single-phase voltage is required, how are the phases connected to local distribution boards?
All phases are connected in series
All phases are connected in parallel
Alternate phases are connected
Only one phase is connected
What is the purpose of connecting alternate phases to local distribution boards for 230V single-phase voltage?
To increase the voltage supply
To decrease the voltage supply
To balance the supply
To convert AC to DC
What is the purpose of electrical lighting or illumination as mentioned in the learning material?
To control the temperature in a room
To achieve practical or aesthetic effects
To generate electrical power
To measure electrical resistance
According to the learning material, what has been omitted from the wiring diagram for clarity?
The switch
The light fixture
The earth wires
The power source
What does the wiring diagram in the learning material represent?
A complex lighting circuit with multiple switches
A basic lighting circuit with two light fixtures
A schematic for an electrical generator
A blueprint for a building's electrical layout
What type of circuit is shown in the diagram?
Parallel circuit
Series circuit
Complex circuit
Open circuit
In a series circuit, how is the current distributed?
The current varies between different points of the circuit.
The current is highest at the battery and lowest at the bulbs.
The current is the same at all points of the circuit.
The current is only present in the battery.
What type of circuit is depicted in the diagram?
Series circuit
Parallel circuit
Complex circuit
Simple circuit
In a parallel circuit, if the current measured at ammeter 1 is added to the current at ammeter 2, what does this sum represent?
The total resistance in the circuit
The total voltage supplied by the battery
The total current coming out of the supply
The power consumed by the bulbs
What is the purpose of introducing a switch in the line side of a lighting circuit?
To increase the electrical resistance
To control the lighting by breaking or making the circuit
To decrease the voltage supplied to the light
To change the direction of the current
What has been omitted from the diagram for clarity?
The switch
The light bulb
The earth wires
The live and neutral wires
What is the term used to describe the configuration where two switches control one light, often found at the top and bottom of a staircase?
Single-way switching
Double-way switching
Two-way switching
Multi-way switching
What type of switching is used when three switches are required, such as on multi-level staircases or in long corridors?
Basic switching
Two-way switching
Intermediate switching
Complex switching
Why are sodium vapour lamps commonly used for street lighting, especially on motorways?
They are inexpensive to produce.
They have a high color rendering index.
They are highly efficient and penetrate mist and fog well.
They require very low maintenance.
What is the characteristic light color emitted by sodium vapour lamps when they become excited?
Blue
Green
Red
Yellow
At what wavelength do sodium vapour lamps emit light?
589 nanometres (nm)
450 nanometres (nm)
650 nanometres (nm)
780 nanometres (nm)
What type of lighting is now replacing sodium vapour lamps?
Compact Fluorescent Lamps (CFL)
Halogen lamps
Light-emitting diode (LED) alternatives
Incandescent bulbs
Why is fluorescent tube lighting being replaced by LED luminaires in suspended ceilings?
LED luminaires are more expensive to run.
LED luminaires generate more unwanted heat.
LED luminaires are less likely to cause flicker effects and are more energy-efficient.
LED luminaires are harder to install.
What is a luminary in the context of lighting?
A type of circuit breaker.
A light-giving body.
A type of fluorescent tube.
A protective device against surges.
What health issue can be seriously affected by the flicker effects of fluorescent tubes?
Photosensitive epilepsy.
Asthma.
Migraines.
Allergies.
What is the purpose of a type C breaker in circuits with large banks of fluorescent lights?
To increase the light output.
To reduce the cost of running the lights.
To prevent a circuit breaker tripping due to high inrush current.
To make the lights flicker less.
Why is the replacement of fluorescent lights with LED lights beneficial to the environment?
Because LED lights contain high pressure mercury.
Because LED lights are less bright and consume more energy.
Because fluorescent lights contain low pressure mercury and phosphorus, which are hazardous waste.
Because LED lights are more expensive and thus less likely to be used.
Why are LED luminaires increasingly replacing filament lamps and tubes?
Because they are more expensive
Because they have a shorter lifespan
Because of their high efficiency and reduced heat emission when illuminated
Because they require more power
What would a 100 watt (W) filament lamp typically be replaced by?
100W LED
50W LED
5W LED
10W LED
How does the lifetime of LED lamps compare to that of filament lamps?
LED lamps last 50–60 hours, while filaments last 10,000 hours
LED lamps last 200–300 hours, while filaments last 10,000 hours
LED lamps last 10,000 hours, while filaments last 50–60 hours
LED lamps last 10,000 hours, while filaments last 200–300 hours
LED lights operate through what process?
Electromagnetism
Electroluminescence
Electrolysis
Electron emission
What are inset downlights designed for?
Installation in open ceilings
Installation in suspended ceilings
Outdoor lighting
Underwater lighting
What is the usual rating for LED downlights that are designed for better overall illumination of a room?
1W or 2W
3W or 4W
5W or 8W
10W or 12W
What is a feature of modern LED downlights?
They are waterproof
They are firestop rated
They are solar-powered
They have motion sensors
Which of the following is NOT an advantage of installing LED lighting mentioned in the text?
Long life
No 'phantom effect'
If one light fails, the others will not continue to provide illumination
Energy efficiency
What is the main reason halogen lights are not as efficient as LED lighting?
Halogen lights do not incorporate a regeneration effect
Halogen lights use a PIR sensor
Halogen lights maintain the life of the tungsten filament through a chemical reaction
Halogen lights are typically set to illuminate for a limited time
What triggers the security lighting installed on the exterior of a building?
A chemical reaction
Movement of a heat source detected by a PIR sensor
The efficiency of LED lighting
The limited time set for illumination
What is the purpose of setting security lights to illuminate for a limited time?
To maintain the life of the tungsten filament
To trigger the PIR sensor
To prevent energy wastage
To replace LED lights
What is increasingly replacing halogen lights in security lighting?
Tungsten filament lights
PIR sensors
LED alternatives
Infra-red sensors
What is a data network designed to do?
Connect one computer to another within a building
Transfer data from one network access point to another
Provide internet access to schools only
Control data usage on individual devices
Which of the following best describes a network?
A single computer connected to the internet
A system that only controls data transmission lines
A connection of multiple devices that can range from a small collection within a building to millions of computers worldwide
A data storage system for telecommunications
What aspects of modern day communication are impacted by data networks and networking solutions?
Only email communications
Only satellite television broadcasts
Only telephone landlines
Telecommunications and the internet
What does LAN stand for?
Large Area Network
Local Area Network
Long Area Network
Linked Area Network
Which of the following is a characteristic of a LAN?
It connects computers across different geographical areas.
It is not necessarily connected to the internet.
It is the same as the internet.
It requires media such as broadband cables to connect.
What is a WAN?
A network that operates within a single building.
A network that connects devices in close proximity.
A network created when one or more LANs are connected.
A network that only connects home computers.
Which of the following is true about the internet?
It is a type of LAN.
It is exclusively used within schools.
It is a type of WAN.
It cannot connect different geographical places.
