Test

Unit 203 Revision Question Bank No.2

Usuario eliminado 40 preguntas Actualizado el 24 ene 2019

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Preguntas del test (40)

1If a steel wire armoured cable had an overall diameter of 16mm what would be the maximum spacing of clips on a horizontal run
1. A250mm
2. B450mm
3. C400mm
4. D0.5m
2If Band 1 and Band 2 circuits are run through the same trunking what special requirements must you achieve?
1. ACables to be run in the opposite direction
2. BCables are installed in separate compartments
3. CAre not permitted in Trunking
4. DMust be able to carry the same colour Live and Neutral conductors
3If the ambient temperature increases the copper cable will
1. AIncrease resistance
2. BDecrease resistance
3. CStay the same
4. DWill melt
4If the distance of an interactive whiteboard is 2m and the measurement taken is 4cm what is the scale of the drawing
1. A1:20
2. B1:100
3. C1:40
4. D1:50
5If the distance of a wall is 4m and the measurement taken by the drawing is 4cm what is the scale
1. A1:75
2. B1:100
3. C1:50
4. D1:20
6In electrical systems, the definition of isolation is:
1. APlacing conductors from each circuit in separate conduit
2. BProtecting each circuit by a separate circuit breaker
3. CCutting off electrical energy from every power source
4. DIsolating circuits & equipment from the general mass of earth
7In order to determine types of materials and quantities required to complete an electrical installation, an estimator will require:
1. AOperating sheets & manufacturers' models
2. BExploded view diagrams & data sheets
3. CA technical drawing & data sheet
4. DSpecification & wiring diagram
8For large number of computers installed on a large [LAN] network, what cable would you use?
1. ASteel wired armour
2. BFibre optics
3. CPVC
4. DMICC
9On a construction site the voltage to be used for power tools is restricted to
1. A110V AC
2. B230V AC
3. C110V DC
4. D55V AC
10On site, where a crane is operating overhead, in addition to a safety helmet an electrician should wear
1. AFace mask
2. BA high visibility jacket
3. CRubber soled shoes
4. DA donkey jacket

11Operating characteristics information supplied with electric motors by the manufacturers is in the form of:
1. AData sheets
2. BMemoranda
3. CCircuit diagrams
4. DWiring diagrams
12Overload can occur in a circuit if
1. AA short circuit is present between line and neutral
2. BThe circuit is electrically sound
3. CBetween two conductors at different potentials
4. DIf there is a loose connection of conductors
13PVC & metal conduit are fixed using:
1. ACrampets
2. BSpiral fixings
3. CCleats
4. DSaddles
14Solar Thermal installations work on which principle
1. AWater passes through the panel allowing the generator to rotate.
2. BWind hits the panels and creates an electro motive force through the semiconductor material
3. CSun hits the panels and warms up the water.
4. DSun hits the panels and turn into electricity
15The British Standard for a cartridge fuse used in 13A plug tops
1. ABS 88
2. BBS 1361
3. CBS 1362
4. DBS 3036
16The cables that connect between two 2 way switches are said to be called
1. ASwitch wires
2. BStrippers
3. CSwitch lines
4. DStrappers
17The distribution supply cable to a building is usually:
1. ASteel Wire Armoured
2. BPVC sheathed & insulated
3. CPVC insulated in steel conduit
4. DMineral Insulated
18The earthing arrangement when incoming supply cable sheath provides an independent earth is
1. ATN - C
2. BTT
3. CTN - S
4. DTN - C - S
19The main reason to fix cable to walls on horizontal runs using appropriate clips at suitable intervals is to prevent:
1. AUntidy appearance
2. BStress on the cable
3. CStop the cable being pulled down
4. DStray magnetic fields
20The maximum disconnection time for a circuit over 32A is
1. A1 second
2. B0.4 seconds
3. C0.2 seconds
4. D5 seconds
21The maximum number of accidents on a construction site is due to
1. AFalling/tripping/manual handling
2. BFalling/manual handling/use of equipment
3. CTripping/manul handling/use of equipment
4. DUse of materials/falling/manual handling
22The stop button used to allow isolation of electrical equipment for maintenance must:
1. AEasy to re-close
2. BPlaced close to the incoming supply
3. CAble to be bypassed
4. DBe impossible to re-close unintentionally
23What does the following picture show?
1. ASpacer Bar Saddle
2. BCable Cleat
3. CHospital Saddle
4. DCrampet
24What fixings would be used on a hollow partition wall?
1. ARawl plug
2. BSpring toggle
3. CScrew
4. DCable cleat
25What fixings would be used on a brick wall?
1. ARawl plug and round headed wood screw
2. BSpring toggle
3. CSelf-adhesive tape
4. DGravity toggle
26What form of switching is used on a security system?
1. ARelay
2. BContactor
3. CDirect on line starter
4. DOne way switch
27In a switch started fluorescent tube circuit, the function of the choke when the lamp is lit, is to
1. ALimit current flowing in the lamp
2. BProduce a voltage surge across the lamp
3. CCause current in the circuit to leap voltage.
4. DIncrease current flow in the circuit
28The maximum span between buildings for unjointed 25mm diameter steel conduit is
1. A2m
2. B3m
3. C2.5m
4. D1.5 m
29The most accurate method of forming right angle bends in steel conduit is:
1. AA vice and heat source
2. BA wooden block
3. CThe knee
4. DA bending machine
30The most important factor when selecting a cable of known rating is:
1. AColour of insulation
2. BThe temperature of operation
3. CShape of the outer sheath
4. DDistance between cable cores
31The purpose of the day work sheet is to record
1. AAll worked hours
2. BHours worked in addition to the main contract
3. CAll work to be carried out in one day
4. DAny work related expenses to be claimed from petty cash
32The purpose of the pvc sheath on a pvc/pvc multicore cable is to
1. APrevent damage to insulation
2. BProvide a CPC
3. CProvide a fixing point for plug cord grips
4. DColour code the cable
33The rating of an RCD installed to provide additional protection for equipment used outside the main equipotential zone is?
1. A30mA
2. B500mA
3. C100mA
4. D50mA
34The standard transmission high voltage is
1. A11kV
2. B400V
3. C11kV
4. D400kV
35The symbol Ca is used to represent which rating factor
1. AThermal Insulation
2. BInstallation Condition
3. CAmbient temperature
4. DGrouping
36To mark out metal trunking for cutting, you would use:
1. ARule, square & scriber
2. BGauge, level & tape
3. CKnife, hammer & screwdriver
4. DVee block, saw & chisel
37Vertical & horizontal runs of trunking must be adequately supported to:
1. AProvide earth continuity
2. BAvoid stress & damage to the cable
3. CPrevent possible fire damage
4. DPrevent distortion to the trunking
38Which cable type is most suitable for cable cleats?
1. ASingles
2. BSteel wire armoured
3. CMICC
4. DPVC/PVC/CPC
39What conductor is used to connect to extraneous conductive parts?
1. AMain Protective Bonding conductor
2. BMain Earthing conductor
3. CCircuit Protective conductor
4. DEarth Sleeving
40What is the conduit factor for a 4m 20mm conduit which incorporates two bends?
1. A222
2. B204
3. C91
4. D213