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