Question 1
Question
Which one of the following directly affects all persons working with electricity in a working environment?
Answer
-
Electricity Safety, Quality and Continuity Regulations
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BS 7671
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Electricity at Work Regulations
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Construction design and management Regulations
Question 2
Question
Which one of the following are non-statutory regulations?
Answer
-
Electricity at Work Regulation
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Manual Handling Regulation
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BS 7671
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Provision and Use of Work Equipment Regulations
Question 3
Question
Which one of the following is a direct implication of not complying with statutory regulations?
Answer
-
Loss of earnings
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Lost clients
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Dismissal
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Prosecution
Question 4
Question
The document showing the location of electrical equipment in an electrical installation is a:
Answer
-
specification
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drawing
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variation order
-
Gantt chart
Question 5
Question
Which one of the following diagram types does not show individual conductors or cables but shows the sequence of equipment?
Answer
-
Block
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Circuit
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Schematic
-
Bar chart
Question 6
Question
The symbol shown represents:
Answer
-
one-way switch
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two-way switch
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intermediate switch
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pull switch
Question 7
Question
Which one of the following is the correct drawing scale where a wall, 4m in length, measures 8cm on a drawing?
Question 8
Question
A drawing is produced to a scale of 1:50 showing a socket outlet installed 3.5cm from the corner of a room. Which one of the following is the actual distance from the corner in the room?
Question 9
Question
A circuit installed to supply a fire panel would be identified as:
Question 10
Question
The type of trunking that can be used as a circuit protective conductor is:
Answer
-
mini
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PVC dado
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steel
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plastic
Question 11
Question
The insulation material of mineral insulated metal sheathed cables is absorbent; therefore the terminations must be:
Answer
-
watertight
-
correctly identified
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fitted with a gland
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fitted with a shroud
Question 12
Question
Additional cable supports should be provided in trunking where:
Answer
-
segregation is required
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there are long vertical runs
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trunking is made of plastic
-
the walls are made of lightweight block
Question 13
Question
Band I and Band II circuits can be enclosed in the same enclosure, provided that:
Answer
-
the current rating of all circuits does not exceed 10A
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they are twisted around each other along the trunking length
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every cable or conductor is insulated for the highest voltage present
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there are the same number of Band I and Band II circuits
Question 14
Question
Which one of the following is the type of conduit fixing shown?
Answer
-
Cleat
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Clip
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Crampet
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Saddle
Question 15
Question
Which one of the following symbols represents the rating factor for thermal insulation?
Question 16
Question
Which one of the following is the value of voltage drop, per ampere, per metre, for a 10mm2 multi-core flat thermoplastic 70°C cable, intended to supply a single phase circuit?
Answer
-
44 mV/A/m
-
11 mV/A/m
-
4.4 mV/A/m
-
2.8 mV/A/m
Question 17
Question
Which one of the following is the maximum current carrying capacity for a single core 6mm2 70°C thermoplastic insulated non armoured cable, enclosed in conduit on a wall installed for a single phase circuit?
Question 18
Question
Which one of the following is the value of voltage drop, in millivolts per ampere per metre, for a 4mm2 multi core thermosetting non armoured cable, intended to supply a single phase circuit?
Answer
-
29 mV/A/m
-
18 mV/A/m
-
11 mV/A/m
-
7.3 mV/A/m
Question 19
Question
Which one of the following devices is suitable for an installation supplying an X-ray machine in a hospital?
Answer
-
BS 3036 rewireable fuse
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BS EN 60898 Type D
-
BS EN 60898 Type C
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BS EN 60898 Type B
Question 20
Question
Which one of the following devices will disconnect in the fastest time if a short circuit current of approximately 400A occurred on a circuit?
Answer
-
32A/30mA Type C RCBO
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32A Type B circuit breaker
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32A Type C circuit breaker
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32A Type D circuit breaker
Question 21
Question
Which one of the following is the minimum conduit size suitable for a short straight run containing the following stranded cables:
• 4 x 1.5mm2
• 3 x 2.5mm2?
Question 22
Question
Which one of the following is the minimum conduit size suitable for a short straight run containing the following stranded cables:
• 8 x 1.5mm2
• 2 x 2.5mm2
• 2 x 4.0mm2?
Question 23
Question
Which one of the following is the conduit capacity factor to be used where a 25mm conduit has 2 bend in a 6m run?
Question 24
Question
The electrical system in which the connection to earth is by an earth electrode is:
Question 25
Question
Which one of the following earthing arrangements is shown in the diagram?
Question 26
Question
Which one of the following is the correct name of the component which links the main earthing terminal of an installation to the means of earthing?
Question 27
Question
What is represented by Zs in the following formula:
Zs = Ze + (R1 + R2)?
Answer
-
Total earth fault loop impedance
-
External earth fault loop impedance
-
Final circuit earth fault loop impedance
-
Combined resistance of the earth path
Question 28
Question
Which one of the following defines the term ‘main protective bonding conductor’?
Answer
-
The conductor which links the MET to an earth electrode
-
The conductor which links the MET to extraneous conductive parts
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The conductor which links the MET to exposed conductive parts
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The conductor which links the MET to the means of earthing
Question 29
Question
Which one of the following is the purpose of the main protective bonding conductor?
Answer
-
To raise extraneous conductive parts to the same voltage as the supply under overload
-
To raise extraneous conductive parts to the same voltage as the supply under earth fault conditions
-
To raise extraneous conductive parts to the same voltage as the supply under normal conditions
-
To raise extraneous conductive parts to the same voltage as the supply under transient fault conditions
Question 30
Question
Which one of the following is an exposed conductive part?
Question 31
Question
Which one of the following is metal cable trunking?
Question 32
Question
Which one of the following is an extraneous conductive part?
Question 33
Question
Which one of the following methods of generating electricity uses fossil fuels?
Answer
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Wave power
-
Solar
-
Gas
-
Wind
Question 34
Question
Which one of the following uses sunlight to generate electricity?
Answer
-
Photo-voltaic
-
Biomass
-
Wind
-
Air source heat pump
Question 35
Question
Which one of the following is a transmission voltage?
Question 36
Question
Which one of the following is a typical distribution voltage for a medium-sized factory where a private sub station is located?
Question 37
Question
In which of the following parts of the electrical distribution network would a step-down transformer be located?
Question 38
Question
Which one of the following describes the process of a solar photo voltaic system?
Answer
-
Solar power is used to ignite a biomass which heats up water
-
Solar power is collected by a solar panel which provides electricity
-
Solar power is collected by a solar panel which provides hot water
-
Solar power causes hot air to rise, rotating a generator that produces electricity
Question 39
Question
Which one of the following is a suitable use for rainwater harvesting?
Answer
-
Baths/showers
-
Toilet flushing
-
Drinking water
-
Cooking water
Question 40
Question
Which one of the following micro-generation systems requires the least maintenance once installed?