Question 1

Cables with 'wedge-shaped' cores are manufactured to

Accepted Answer

A)  improve their current-carrying capacity 
B)  reduce the electrical stress within their insulation 
C)  improve their flexibility 
D)  reduce their overall diameter 
A)  improve their current-carrying capacity 
B)  reduce the electrical stress within their insulation 
C)  improve their flexibility 
D)  reduce their overall diameter D

Question 2

For cables manufactured for use in the EU, the insulation colour for a neutral conductor is

Accepted Answer

A)  red 
B)  brown 
C)  black 
D)  blue 
A)  red 
B)  brown 
C)  black 
D)  blue D

Question 3

The term, 'live conductors', refers to a cable's

Accepted Answer

A)  line conductor(s) 
B)  neutral conductor 
C)  line and neutral conductors 
D)  line, neutral, and earth conductors 
A)  line conductor(s) 
B)  neutral conductor 
C)  line and neutral conductors 
D)  line, neutral, and earth conductors C

Question 4

What property makes aluminium generally unsuitable for domestic wiring systems?

Accepted Answer

A)  poor conductivity compared to copper 
B)  unreliable pressure connections due to 'cold flow' 
C)  poor conducting quality of its corrosive film 
D)  low melting point 
A)  poor conductivity compared to copper 
B)  unreliable pressure connections due to 'cold flow' 
C)  poor conducting quality of its corrosive film 
D)  low melting point

Question 5

For cables manufactured for use in the EU, the insulation colour for a line conductor is

Accepted Answer

A)  red 
B)  brown 
C)  black 
D)  blue 
A)  red 
B)  brown 
C)  black 
D)  blue

Question 6

In the electrical industry, 'wires' are generally referred to as

Accepted Answer

A)  flex' 
B)  conductors' 
C)  cores' 
D)  cables' 
A)  flex' 
B)  conductors' 
C)  cores' 
D)  cables'

Question 7

The purpose of armouring a cable is to

Accepted Answer

A)  protect it against mechanical damage 
B)  relieve and electric stress 
C)  prevent the ingress of moisture 
D)  all of the above 
A)  protect it against mechanical damage 
B)  relieve and electric stress 
C)  prevent the ingress of moisture 
D)  all of the above

Question 8

Insulation is specified, within the UK's Wiring Regulations, in terms of

Accepted Answer

A)  the materials from which it is manufactured 
B)  its anticipated operating temperature 
C)  its method of manufacture 
D)  its insulation resistance 
A)  the materials from which it is manufactured 
B)  its anticipated operating temperature 
C)  its method of manufacture 
D)  its insulation resistance

Question 9

Place the following conductors in order, from best to worst in terms of their conductivity: aluminium, silver, gold, and copper

Accepted Answer

A)  gold, silver, copper, aluminium 
B)  silver, gold, copper, aluminium 
C)  silver, copper, gold, aluminium 
D)  silver, copper, aluminium, gold 
A)  gold, silver, copper, aluminium 
B)  silver, gold, copper, aluminium 
C)  silver, copper, gold, aluminium 
D)  silver, copper, aluminium, gold

Question 10

The maximum electric field that can be sustained by a dielectric before breakdown occurs' describes an insulator's

Accepted Answer

A)  insulation resistance 
B)  dielectric strength 
C)  resistivity 
D)  voltage gradient 
A)  insulation resistance 
B)  dielectric strength 
C)  resistivity 
D)  voltage gradient

Question 11

For a stranded '7/0.85' cable, the figure '0.85' refers to the

Accepted Answer

A)  the diameter of individual strands 
B)  the cross-sectional area of individual strands 
C)  the diameter of the conductor 
D)  the cross-sectional area of the conductor 
A)  the diameter of individual strands 
B)  the cross-sectional area of individual strands 
C)  the diameter of the conductor 
D)  the cross-sectional area of the conductor

Question 12

A cable, comprising a line, neutral, and protective (earth) conductor, is termed a

Accepted Answer

A)  single-core conductor' 
B)  two-core conductor' 
C)  three-core conductor' 
A)  single-core conductor' 
B)  two-core conductor' 
C)  three-core conductor'

Question 13

A 'cable' consists of

Accepted Answer

A)  one or more conductors 
B)  one or more insulated conductors 
C)  one or more insulated conductors enclosed in a protective sheath 
A)  one or more conductors 
B)  one or more insulated conductors 
C)  one or more insulated conductors enclosed in a protective sheath

Question 14

Stranded conductors are manufactured to

Accepted Answer

A)  ease their manufacture 
B)  increase their current ratings 
C)  increase the flexibility of a cable 
D)  improve their heat dissipation 
A)  ease their manufacture 
B)  increase their current ratings 
C)  increase the flexibility of a cable 
D)  improve their heat dissipation

Question 15

The purpose of a cable's outer sheath is to

Accepted Answer

A)  provide limited mechanical protection 
B)  prevent the ingress of moisture 
C)  contain the individual cores 
D)  all of the above 
A)  provide limited mechanical protection 
B)  prevent the ingress of moisture 
C)  contain the individual cores 
D)  all of the above

Cables with 'wedge-shaped' cores are manufactured to

For cables manufactured for use in the EU, the insulation colour for a neutral conductor is

The term, 'live conductors', refers to a cable's

What property makes aluminium generally unsuitable for domestic wiring systems?

For cables manufactured for use in the EU, the insulation colour for a line conductor is

In the electrical industry, 'wires' are generally referred to as

The purpose of armouring a cable is to

Insulation is specified, within the UK's Wiring Regulations, in terms of

Place the following conductors in order, from best to worst in terms of their conductivity: aluminium, silver, gold, and copper

The maximum electric field that can be sustained by a dielectric before breakdown occurs' describes an insulator's

For a stranded '7/0.85' cable, the figure '0.85' refers to the

A cable, comprising a line, neutral, and protective (earth) conductor, is termed a

A 'cable' consists of

Stranded conductors are manufactured to

The purpose of a cable's outer sheath is to

The Electron Theory of Electricity

Electric Current

Potential and Potential Difference

Resistance

Effect of Temperature Change Upon Resistance

Ohms Law of Constant Proportionality

Series, Parallel and Series-Parallel Circuits

Cells and Batteries

Internal Resistance of Voltage Sources

Energy, Work, Heat and Power

Magnetism

Electromagnetism

Magnetic Circuits

Electromagnetic Induction

Capacitors and Capacitance

Introduction to Alternating Current

Series Alternating-Current Circuits

Power in Alternating-Current Circuits

Parallel Alternating-Current Circuits

Power Factor Improvement

Balanced Three-Phase Ac Systems

Filters

Exam 5: Practical Conductors and Insulators

Cables with 'wedge-shaped' cores are manufactured to

For cables manufactured for use in the EU, the insulation colour for a neutral conductor is

The term, 'live conductors', refers to a cable's

What property makes aluminium generally unsuitable for domestic wiring systems?

For cables manufactured for use in the EU, the insulation colour for a line conductor is

In the electrical industry, 'wires' are generally referred to as

The purpose of armouring a cable is to

Insulation is specified, within the UK's Wiring Regulations, in terms of

Place the following conductors in order, from best to worst in terms of their conductivity: aluminium, silver, gold, and copper

The maximum electric field that can be sustained by a dielectric before breakdown occurs' describes an insulator's

For a stranded '7/0.85' cable, the figure '0.85' refers to the

A cable, comprising a line, neutral, and protective (earth) conductor, is termed a

A 'cable' consists of

Stranded conductors are manufactured to

The purpose of a cable's outer sheath is to

The Electron Theory of Electricity

Electric Current

Potential and Potential Difference

Resistance

Effect of Temperature Change Upon Resistance

Ohms Law of Constant Proportionality

Series, Parallel and Series-Parallel Circuits

Cells and Batteries

Internal Resistance of Voltage Sources

Energy, Work, Heat and Power

Magnetism

Electromagnetism

Magnetic Circuits

Electromagnetic Induction

Capacitors and Capacitance

Introduction to Alternating Current

Series Alternating-Current Circuits

Power in Alternating-Current Circuits

Parallel Alternating-Current Circuits

Power Factor Improvement

Balanced Three-Phase Ac Systems

Filters