2833100
Descripción
Test por Oliver Balay, actualizado hace más de 1 año
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Creado por Oliver Balay
hace casi 9 años
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Pregunta 1
Pregunta
Which one of the following directly affects all persons working with electricity in a working environment?
Respuesta
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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
Pregunta 2
Pregunta
Which one of the following are non-statutory regulations?
Respuesta
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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
Pregunta 3
Pregunta
Which one of the following is a direct implication of not complying with statutory regulations?
Respuesta
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Loss of earnings
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Lost clients
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Dismissal
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Prosecution
Pregunta 4
Pregunta
The document showing the location of electrical equipment in an electrical installation is a:
Respuesta
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specification
-
drawing
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variation order
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Gantt chart
Pregunta 5
Pregunta
Which one of the following diagram types does not show individual conductors or cables but shows the sequence of equipment?
Respuesta
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Block
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Circuit
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Schematic
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Bar chart
Pregunta 6
Respuesta
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one-way switch
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two-way switch
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intermediate switch
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pull switch
Pregunta 7
Pregunta
Which one of the following is the correct drawing scale where a wall, 4m in length, measures 8cm on a drawing?
Respuesta
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1:50
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1:100
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1:200
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1:500
Pregunta 8
Pregunta
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?
Respuesta
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0.875m
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1.75m
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3.5m
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7m
Pregunta 9
Pregunta
A circuit installed to supply a fire panel would be identified as:
Respuesta
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power and heating
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data communication
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control circuit
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alarm and emergency system
Pregunta 10
Pregunta
The type of trunking that can be used as a circuit protective conductor is:
Respuesta
-
mini
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PVC dado
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steel
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plastic
Pregunta 11
Pregunta
The insulation material of mineral insulated metal sheathed cables is absorbent; therefore the terminations must be:
Respuesta
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watertight
-
correctly identified
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fitted with a gland
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fitted with a shroud
Pregunta 12
Pregunta
Additional cable supports should be provided in trunking where:
Respuesta
-
segregation is required
-
there are long vertical runs
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trunking is made of plastic
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the walls are made of lightweight block
Pregunta 13
Pregunta
Band I and Band II circuits can be enclosed in the same enclosure, provided that:
Respuesta
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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
Pregunta 14
Pregunta
Which one of the following is the type of conduit fixing shown?
Respuesta
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Cleat
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Clip
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Crampet
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Saddle
Pregunta 15
Pregunta
Which one of the following symbols represents the rating factor for thermal insulation?
Respuesta
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Ci
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Ca
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Cf
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Cg
Pregunta 16
Pregunta
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?
Respuesta
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44 mV/A/m
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11 mV/A/m
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4.4 mV/A/m
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2.8 mV/A/m
Pregunta 17
Pregunta
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?
Respuesta
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31A
-
32A
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36A
-
41A
Pregunta 18
Pregunta
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?
Respuesta
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29 mV/A/m
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18 mV/A/m
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11 mV/A/m
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7.3 mV/A/m
Pregunta 19
Pregunta
Which one of the following devices is suitable for an installation supplying an X-ray machine in a hospital?
Respuesta
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BS 3036 rewireable fuse
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BS EN 60898 Type D
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BS EN 60898 Type C
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BS EN 60898 Type B
Pregunta 20
Pregunta
Which one of the following devices will disconnect in the fastest time if a short circuit current of approximately 400A occurred on a circuit?
Respuesta
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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
Pregunta 21
Pregunta
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?
Respuesta
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16mm
-
20mm
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25mm
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32mm
Pregunta 22
Pregunta
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?
Respuesta
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16mm
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20mm
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25mm
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32mm
Pregunta 23
Pregunta
Which one of the following is the conduit capacity factor to be used where a 25mm conduit has 2 bend in a 6m run?
Respuesta
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111
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182
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333
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600
Pregunta 24
Pregunta
The electrical system in which the connection to earth is by an earth electrode is:
Respuesta
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TT
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TN-S
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TN-C
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TN-C-S
Pregunta 25
Pregunta
Which one of the following earthing arrangements is shown in the diagram?
Respuesta
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TN-C-S
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TT
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TN-C
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TN-S
Pregunta 26
Pregunta
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?
Respuesta
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Main protective bonding conductor
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Supplementary equipotential bond
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Earthing conductor
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Functional earth
Pregunta 27
Pregunta
What is represented by Zs in the following formula:
Zs = Ze + (R1 + R2)?
Respuesta
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Total earth fault loop impedance
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External earth fault loop impedance
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Final circuit earth fault loop impedance
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Combined resistance of the earth path
Pregunta 28
Pregunta
Which one of the following defines the term ‘main protective bonding conductor’?
Respuesta
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The conductor which links the MET to an earth electrode
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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
Pregunta 29
Pregunta
Which one of the following is the purpose of the main protective bonding conductor?
Respuesta
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To raise extraneous conductive parts to the same voltage as the supply under overload
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To raise extraneous conductive parts to the same voltage as the supply under earth fault conditions
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To raise extraneous conductive parts to the same voltage as the supply under normal conditions
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To raise extraneous conductive parts to the same voltage as the supply under transient fault conditions
Pregunta 30
Pregunta
Which one of the following is an exposed conductive part?
Respuesta
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Metal-clad switch
-
Structural steelwork
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Air conditioning ducting
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Metallic oil service pipe
Pregunta 31
Pregunta
Which one of the following is metal cable trunking?
Respuesta
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Earthed conductive part
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Extraneous conductive part
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Insulated part
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Exposed conductive part
Pregunta 32
Pregunta
Which one of the following is an extraneous conductive part?
Respuesta
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Metallic gas service pipe
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Metal-clad twin socket outlet
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Heavy duty steel conduit
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PVC mini-trunking
Pregunta 33
Pregunta
Which one of the following methods of generating electricity uses fossil fuels?
Respuesta
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Wave power
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Solar
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Gas
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Wind
Pregunta 34
Pregunta
Which one of the following uses sunlight to generate electricity?
Respuesta
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Photo-voltaic
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Biomass
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Wind
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Air source heat pump
Pregunta 35
Pregunta
Which one of the following is a transmission voltage?
Respuesta
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400kV
-
33kV
-
11kV
-
400V
Pregunta 36
Pregunta
Which one of the following is a typical distribution voltage for a medium-sized factory where a private sub station is located?
Respuesta
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230V
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400V
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5kV
-
11kV
Pregunta 37
Pregunta
In which of the following parts of the electrical distribution network would a step-down transformer be located?
Respuesta
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Power station
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Pylon
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Local distribution sub station
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Inverter
Pregunta 38
Pregunta
Which one of the following describes the process of a solar photo voltaic system?
Respuesta
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Solar power is used to ignite a biomass which heats up water
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Solar power is collected by a solar panel which provides electricity
-
Solar power is collected by a solar panel which provides hot water
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Solar power causes hot air to rise, rotating a generator that produces electricity
Pregunta 39
Pregunta
Which one of the following is a suitable use for rainwater harvesting?
Respuesta
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Baths/showers
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Toilet flushing
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Drinking water
-
Cooking water
Pregunta 40
Pregunta
Which one of the following micro-generation systems requires the least maintenance once installed?
Respuesta
-
Micro-combined heat and power
-
Air source heat pump
-
Biomass
-
Solar thermal
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