WorksheetsData Cabling and Networking Quiz
Total questions: 30
Worksheet time: 15mins
What is the main purpose of a Local Area Network (LAN)?
To connect homes to the national grid
To link computers and devices within an organisation
To provide Wi-Fi access only
To store electrical energy for back-up use
Which of the following devices is not typically installed by an electrician during a data installation?
Ethernet cabling
Servers and data switches
RJ45 outlets
Cable trunking
What is the usual maximum length of a Cat 6 Ethernet cable before performance degrades?
50 metres
75 metres
90 metres fixed + 10 metres patch leads
150 metres
What type of connector is most commonly used for data network cabling?
RG59
RJ11
RJ45
BS1363
How many pairs of conductors are inside a standard Cat 6 data cable?
Two pairs
Three pairs
Four pairs
Eight pairs
Why are pairs of wires twisted together in a Cat 6 cable?
To make installation easier
To reduce interference and cross-talk
To colour-code the conductors
To increase flexibility
The correct bending radius for a Cat 6 cable should be at least:
Twice the overall diameter
Three times the overall diameter
Four times the overall diameter
Five times the overall diameter
The main function of a data hub or switch is to:
Increase cable strength
Distribute data signals to multiple devices
Provide surge protection
Reduce signal noise
What is the total maximum allowed run length for Ethernet cabling including patch leads?
50 m
75 m
100 m
120 m
What device can be used to extend data transmission over distances greater than 100 metres?
Transformer
Circuit breaker
Repeater or switch
Resistor
Category 3 cabling supports data transfer up to:
10 MHz
16 MHz
100 MHz
250 MHz
Category 5 cable supports frequencies up to:
20 MHz
100 MHz
250 MHz
500 MHz
Category 6 cable supports frequencies up to:
100 MHz
250 MHz
500 MHz
750 MHz
Which category of cable is described as “augmented” for improved performance?
Cat 3
Cat 5
Cat 6a
Cat 7
What is the purpose of the cladding in a fibre optic cable?
To protect the core from heat damage
To provide total internal reflection
To give the cable strength
To act as an electrical conductor
Which type of signal is used for data transmission in fibre optic cables?
Electrical current
Sound waves
Laser light
Infrared radiation only
Which of the following is not an advantage of fibre optic cables?
High data transfer rate
No electromagnetic interference
Low installation cost
Long distance performance
What is a main disadvantage of fibre optic cabling?
Slow data rate
Requires repeaters
High installation cost
Susceptible to corrosion
What health risk exists when stripping fibre optic cables?
Electric shock
Fibre shards entering the bloodstream
Exposure to UV light
Noise-induced hearing loss
Why must you never look down the end of a fibre optic cable?
It may contain dust
A live laser beam can damage the eyes
It might conduct electricity
It emits ultraviolet light
What is the typical structure of an optical fibre?
Copper conductor and insulation
Plastic core with metallic braid
Core and cladding layer
Steel wire armour and sheath
What is the purpose of twisting each pair at a different pitch in Cat 6 cables?
Easier termination
Colour identification
To reduce cross-talk between pairs
To save copper
When terminating Ethernet cabling, which type of plug is used?
RJ11
RJ45
BS546
IEC13
The use of active hardware such as switches is necessary when:
Cable runs are shorter than 50 m
Cables are installed outdoors
Cable runs exceed 100 m
Cat 5 cable is used
What does “cross-talk” refer to in data cabling?
Miscommunication between technicians
Electrical interference between pairs of wires
Data errors between software systems
A fault in the power supply
What should data cables be installed in to provide protection?
PVC conduit only
Cable containment such as trunking or basket
Flexible metallic tubing
Armoured sheath
In a network installation, which component connects users’ PCs and printers to the LAN?
Distribution board
Ethernet hub or switch
Socket outlet
Residual current device
What could result if data cabling is bent beyond the minimum radius?
Electrical short circuit
Increased signal loss or failure
Damage to the hub
Reduced insulation resistance
Why are fibre optic cables preferred for high-volume data transmission?
They are easier to terminate
They transmit data using light, avoiding interference
They are less expensive than Cat 6
They use thicker insulation
Which of the following statements about data cable installation is true?
Cat 6 cables can be run up to 200 m without loss
Bending radius can be ignored for short runs
Total cable length should not exceed 100 m
Fibre optic cables do not need termination
