2817776
Descripción
Test por Oliver Balay, actualizado hace más de 1 año
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Creado por Oliver Balay
hace más de 9 años
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Pregunta 1
Pregunta
If a steel wire armoured cable had an overall diameter of 16mm what would be the maximum spacing of clips on a horizontal run
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250mm
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450mm
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400mm
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0.5m
Pregunta 2
Pregunta
If Band 1 and Band 2 circuits are run through the same trunking what special requirements must you achieve?
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Cables to be run in the opposite direction
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Cables are installed in separate compartments
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Are not permitted in Trunking
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Must be able to carry the same colour Live and Neutral conductors
Pregunta 3
Pregunta
If the ambient temperature increases the copper cable will
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Increase resistance
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Decrease resistance
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Stay the same
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Will melt
Pregunta 4
Pregunta
If the distance of an interactive whiteboard is 2m and the measurement taken is 4cm what is the scale of the drawing
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1:20
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1:100
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1:40
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1:50
Pregunta 5
Pregunta
If the distance of a wall is 4m and the measurement taken by the drawing is 4cm what is the scale
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1:75
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1:100
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1:50
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1:20
Pregunta 6
Pregunta
In a switch started fluorescent tube circuit, the function of the choke when the lamp is lit, is to
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Limit current flowing in the lamp
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Produce a voltage surge across the lamp
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Cause current in the circuit to leap voltage.
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Increase current flow in the circuit
Pregunta 7
Pregunta
In electrical systems, the definition of isolation is:
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Placing conductors from each circuit in separate conduit
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Protecting each circuit by a separate circuit breaker
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Cutting off electrical energy from every power source
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Isolating circuits & equipment from the general mass of earth
Pregunta 8
Pregunta
In order to determine types of materials and quantities required to complete an electrical installation, an estimator will require:
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Operating sheets & manufacturers' models
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Exploded view diagrams & data sheets
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A technical drawing & data sheet
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Specification & wiring diagram
Pregunta 9
Pregunta
For large number of computers installed on a large [LAN] network, what cable would you use?
Respuesta
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Steel wired armour
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Fibre optics
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PVC
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MICC
Pregunta 10
Pregunta
On a construction site the voltage to be used for power tools is restricted to
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110V AC
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230V AC
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110V DC
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55V AC
Pregunta 11
Pregunta
On site, where a crane is operating overhead, in addition to a safety helmet an electrician should wear
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Face mask
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A high visibility jacket
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Rubber soled shoes
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A donkey jacket
Pregunta 12
Pregunta
Operating characteristics information supplied with electric motors by the manufacturers is in the form of:
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Data sheets
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Memoranda
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Circuit diagrams
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Wiring diagrams
Pregunta 13
Pregunta
Overload can occur in a circuit if
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A short circuit is present between line and neutral
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The circuit is electrically sound
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Between two conductors at different potentials
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If there is a loose connection of conductors
Pregunta 14
Pregunta
PVC & metal conduit are fixed using:
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Crampets
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Spiral fixings
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Cleats
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Saddles
Pregunta 15
Pregunta
Solar Thermal installations work on which principle
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Water passes through the panel allowing the generator to rotate.
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Wind hits the panels and creates an electro motive force through the semiconductor material
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Sun hits the panels and warms up the water.
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Sun hits the panels and turn into electricity
Pregunta 16
Pregunta
The British Standard for a cartridge fuse used in 13A plug tops
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BS 88
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BS 1361
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BS 1362
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BS 3036
Pregunta 17
Pregunta
The cables that connect between two 2 way switches are said to be called
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Switch wires
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Strippers
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Switch lines
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Strappers
Pregunta 18
Pregunta
The distribution supply cable to a building is usually:
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Steel Wire Armoured
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PVC sheathed & insulated
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PVC insulated in steel conduit
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Mineral Insulated
Pregunta 19
Pregunta
The earthing arrangement when incoming supply cable sheath provides an independent earth is
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TN - C
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TT
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TN - S
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TN - C - S
Pregunta 20
Pregunta
The main reason to fix cable to walls on horizontal runs using appropriate clips at suitable intervals is to prevent:
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Untidy appearance
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Stress on the cable
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Stop the cable being pulled down
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Stray magnetic fields
Pregunta 21
Pregunta
The maximum disconnection time for a circuit over 32A is
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1 second
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0.4 seconds
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0.2 seconds
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5 seconds
Pregunta 22
Pregunta
The maximum number of accidents on a construction site is due to
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Falling/tripping/manual handling
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Falling/manual handling/use of equipment
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Tripping/manul handling/use of equipment
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Use of materials/falling/manual handling
Pregunta 23
Pregunta
The maximum span between buildings for unjointed 25mm diameter steel conduit is
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2m
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3m
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2.5m
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1.5 m
Pregunta 24
Pregunta
The most accurate method of forming right angle bends in steel conduit is:
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A vice and heat source
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A wooden block
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The knee
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A bending machine
Pregunta 25
Pregunta
The most important factor when selecting a cable of known rating is:
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Colour of insulation
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The temperature of operation
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Shape of the outer sheath
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Distance between cable cores
Pregunta 26
Pregunta
The purpose of the day work sheet is to record
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All worked hours
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Hours worked in addition to the main contract
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All work to be carried out in one day
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Any work related expenses to be claimed from petty cash
Pregunta 27
Pregunta
The purpose of the pvc sheath on a pvc/pvc multicore cable is to
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Prevent damage to insulation
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Provide a CPC
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Provide a fixing point for plug cord grips
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Colour code the cable
Pregunta 28
Pregunta
The rating of an RCD installed to provide additional protection for equipment used outside the main equipotential zone is?
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30mA
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500mA
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100mA
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50mA
Pregunta 29
Pregunta
The standard transmission high voltage is
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11kV
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400V
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11kV
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400kV
Pregunta 30
Pregunta
The stop button used to allow isolation of electrical equipment for maintenance must:
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Easy to re-close
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Placed close to the incoming supply
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Able to be bypassed
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Be impossible to re-close unintentionally
Pregunta 31
Pregunta
The symbol Ca is used to represent which rating factor
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Thermal Insulation
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Installation Condition
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Ambient temperature
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Grouping
Pregunta 32
Pregunta
To mark out metal trunking for cutting, you would use:
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Rule, square & scriber
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Gauge, level & tape
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Knife, hammer & screwdriver
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Vee block, saw & chisel
Pregunta 33
Pregunta
Vertical & horizontal runs of trunking must be adequately supported to:
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Provide earth continuity
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Avoid stress & damage to the cable
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Prevent possible fire damage
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Prevent distortion to the trunking
Pregunta 34
Pregunta
Which cable type is most suitable for cable cleats?
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Singles
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Steel wire armoured
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MICC
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PVC/PVC/CPC
Pregunta 35
Pregunta
What conductor is used to connect to extraneous conductive parts?
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Main Protective Bonding conductor
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Main Earthing conductor
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Circuit Protective conductor
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Earth Sleeving
Pregunta 36
Pregunta
What does the following picture show?
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Spacer Bar Saddle
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Cable Cleat
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Hospital Saddle
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Crampet
Pregunta 37
Pregunta
What fixings would be used on a hollow partition wall?
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Rawl plug
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Spring toggle
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Screw
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Cable cleat
Pregunta 38
Pregunta
What fixings would be used on a brick wall?
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Rawl plug and round headed wood screw
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Spring toggle
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Self-adhesive tape
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Gravity toggle
Pregunta 39
Pregunta
What form of switching is used on a security system?
Respuesta
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Relay
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Contactor
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Direct on line starter
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One way switch
Pregunta 40
Pregunta
What is the conduit factor for a 4m 20mm conduit which incorporates two bends?
Respuesta
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222
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204
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91
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213
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