WorksheetsDEE40223 Low Voltage Distribution Topic 1
Total questions: 20
Worksheet time: 10mins
What is the definition of a switchboard according to Regulation 2?
An assembly of switchgear with or without instruments
A type of circuit breaker
An assembly of local switches
A device that generates electricity
What must always equal the power going out to the loads in a switchboard?
The insulation resistance
The current rating of the switchboard
The voltage of the switchboard
The power going into the switchboard
What is the minimum thickness of the enclosure structure for a switchboard?
1.5mm
2.0mm
2.5mm
3.0mm
What degree of protection is required for the enclosure of a switchboard as per IEC 529?
IP 40
IP 41
IP 20
IP 30
What is the purpose of anti-condensation heaters in a switchboard?
To enhance insulation
To prevent moisture accumulation
To increase voltage
To reduce power loss
What is the required sensitivity for the residual current device protecting the heating system?
10mA
100mA
30mA
50mA
What should be the degree of protection for exposed parts within the assemblies?
IP 40
IP 10
IP 30
IP 20
What is the time value of the rated short-time withstand current for switchgear?
3 seconds
1 second
0.5 seconds
2 seconds
What is the purpose of the rubber mat placed in front of every switchboard?
To improve visibility
To enhance aesthetics
To prevent electric shock
To provide insulation
What is the minimum requirement for a person to access any part of the switchboard?
Must be a supervisor
Must be trained in first aid
Must be a licensed electrician
Must be a competent person
What is the purpose of the notice displaying 'DILARANG MASUK'?
To indicate a storage area
To provide instructions
To warn against unauthorized access
To indicate a safe area
What should be done if a switchboard is operating at high voltage?
Ensure all conductors are earthed
Use insulated tools only
No special precautions needed
Place conductors within reach
What is the required action for the metallic frame of any instrument in a switchboard?
It should be painted
It should be earthed
It should be insulated
It should be removed
What is the minimum thickness of electro galvanized sheet steel used in switchboard construction?
2.5mm
1mm
1.5mm
2mm
What is the requirement for a switchboard manufacturer regarding registration?
Must have a physical store
Must have a business license
Must hold a valid Certificate of Registration
Must be registered with the local authority
What should be done if a switchboard is located in a storage area?
Ensure it is fenced or enclosed
Relocate the storage
Leave it as is
Remove the switchboard
What is the required action for shutters covering busbars?
They should be marked 'BUSBAR'
They should be painted
They should be insulated
They should be removed
What is the required action for the short circuit protection device inside each functional unit?
It should be tested regularly
It should be connected to the outgoing supply
It should be connected to the incoming supply
It should be left unconnected
What is the required action for the construction of switchboards regarding corrosion?
No protection needed
Adequate protection against corrosion
Only paint is required
Use of plastic materials
What is the required action for the arrangement of switchboard parts?
They should be removable
They should be accessible
They should be hidden
They should be decorative
