NEW
Font size
Worksheetsjune 22 past paper 8202-20
Total questions: 51
Worksheet time: 1hrs 17mins
What is the first action to take after discovering an accidental fire on a construction site?
Ring the HSE.
Raise the alarm.
Smother the flames.
Find an extinguisher.
Which instrument is required to carry out Safe Isolation?
Loop Impedance Tester.
Low Resistance Ohmmeter.
Approved Voltage Indicator.
Insulation Resistance Tester.
Which substance would require specialist licenced removal if found during a building demolition?
Cement.
Gypsum.
Plywood.
Asbestos.
What is the maximum voltage to earth of a single-phase reduced low voltage supply used on a construction site?
55 V
110 V
230 V
400 V
Who is responsible for working out estimates for materials using a building design?
Client.
Architect.
Clerk of works.
Quantity surveyor.
What unit is equivalent to V x 10^-3?
MV
kV
mV
μV
What is the cross-sectional area for the conductor shown in Figure 1?
Diameter of conductor = 4.52mm
6mm2
10mm2
16mm2
25mm2
Transpose Ib= P / (sqrt(3) * VL * cos(theta) ) to make VL the subject.
VL = P / sqrt(3) * cos(theta) * Ib
VL = sqrt(3) * cos(theta) * Ib / P
VL = sqrt(3) * cos(theta) * P / Ib
VL = Ib / sqrt(3) * cos(theta) * P
Which is a formula for calculating power?
P = I^2R
P = P / R^2
P = VR^2
P = V / 2
A hot water cylinder is 1.4 m high and 0.45 m in diameter. What is the maximum volume of water this cylinder can hold?
0.11 m³
0.22 m³
0.44 m³
0.89 m³
Which has the lowest resistivity?
Lead
Steel
Copper
Aluminium
Which electrical insulation material absorbs moisture if left exposed to the atmosphere?
Butyl rubber
Polyvinyl chloride
Magnesium oxide
Linked polyethylene
What would the instrument shown in Figure 2 be used to display the value of?
Current
Voltage
Wattage
Resistance
What would be the nominal voltage of a battery made up of twenty-five 1.2 V cells when connected in series?
1.2 V
12 V
30 V
48 V
Which formula is correct?
I = V/R
R = I/V
V = I/R
V = R/I
Which type of cable would be most suitable for a circuit which must operate in fire conditions?
MICC
PILCS
PVC SWA
XLPE SWA
What is the total resistance of the circuit shown in Figure 3?
0.8 Ω
1.24 Ω
2.6 Ω
7.7 Ω
What is the total current in the circuit shown in Figure 4 if the ammeter reads 8 Amps?
7.1 A
16.0 A
67.2 A
75.2 A
What does the second finger represent in Fleming's Right Hand Rule?
Field
Motion
Current
Resistance
Figure 5 shows three magnets. What magnetic effects would be expected?
'A' will repel 'B' / 'B' will repel 'C'.
'A' will attract 'B' / 'B' will repel 'C'.
'A' will repel 'B' / 'B' will attract 'C'
'A' will attract 'B' / 'B' will attract 'C'.
What force would be created by a current of 16.2 A flowing through 4800 mm of conductor with a flux density of 0.23 T?
17.88 N
68.15 N
338.09 N
17884.80 N
What is the formula used to calculate the RMS voltage on a 50 Hz sine wave?
V = peak/sqrt{2}
V = peak/2
V = peak x 2
V = peak x sqrt{2}
A transformer has 495 primary and 18 secondary turns and has a secondary voltage of 400 V. What value is the input voltage?
1100 V
3300 V
11000 V
33000 V
What is the principle used by a current transformer?
Induction.
Radiation.
Capacitance.
Conductance.
Which component is represented by the symbol in Figure 6?
LED.
LDR.
Photo diode.
Zener diode.
Which component is used to directly amplify a signal within a piece of electronic equipment?
Resistor.
Thyristor.
Transistor.
Capacitor.
What is the intended purpose of the tool shown in Figure 7?
Cable cutting.
Gripping fixings.
Crimp terminations.
Tighten connections.
A straight 2 m length of conduit is to be installed to house 18 stranded 2.5 mm² PVC insulated copper conductors. What is the minimum conduit factor required?
558
702
774
1044
What type of containment could include a running-coupler?
Tray
Ladder
Conduit
Trunking
What type of circuit is most likely to include insulation displacement connectors?
230 V ring final
HV transmission
11,000 V distribution
ELV telecommunication
Which type of cable is the clip shown in Figure 8 intended to support?
PILC
SWA
MICC
CAT 5
Which tool would be most suitable to cut a hole in a section of trunking to accept a 20 mm conduit coupler and bush?
Pad saw
Hole saw
Hack saw
Panel saw
What is the minimum height that a socket-outlet can be mounted from the finished floor level of a new domestic premises, to comply with Building Regulations?
350 mm
400 mm
450 mm
500 mm
What is the minimum internal bend radius for a multicore stranded copper non-armoured cable with a diameter of 15 mm?
75 mm
60 mm
45 mm
30 mm
What type of fixing is shown in Figure 9?
Tie
Cleat
Saddle
Crampet
What is the minimum degree of protection for the accessible top horizontal surface of a consumer unit?
IP2X
IP3X
IP4X
IP5X
Which type of circuit would most likely use CAT 5 cable?
Socket-outlet
Outside lighting
Domestic cooker
Computer ethernet
What is the maximum permissible distance between supports on an accessible metal trunking system with a cross-sectional area of 400 mm² installed horizontally?
0.75 m
1.25 m
1.00 m
1.50 m
Which is an exposed-conductive-part?
Metallic water pipe.
Galvanized trunking.
Gas installation pipe.
Structural steel girder.
Which is a method of providing Basic Protection as prescribed in BS 7671?
Installation of an RCD.
Insulation of live parts.
Equipotential bonding.
Earthing of exposed parts.
Which conductor is labelled X in Figure 12?
Earthing conductor.
Circuit protective conductor.
Supplementary bonding conductor.
Main protective bonding conductor.
Which conductors shown in Figure 13 would carry the earth fault current?
1, 2 and 7
2, 3 and 4
1, 5 and 6
2, 5 and 7
What is the maximum disconnection time for a 230 V final circuit within a TN-S installation protected by a 20 A BS EN 60898 circuit breaker as prescribed in BS 7671?
0.2 s
0.4 s
1 s
5 s
What is the symbol for the line conductor of a radial circuit?
r1
r2
R1
R2
Conductors are being selected for a domestic premises which is supplied via a 100 A supplier cut-out fuse. The installation forms part of a TN-C-S system. What is the minimum cross-sectional area for main protective bonding conductors within this installation?
4 mm²
6 mm²
10 mm²
16 mm²
What is the design current for a 230 V electric shower rated at 9.5 kW?
4.1 A
24.2 A
39.6 A
41.3 A
Which publication contains a table giving percentages to be used when applying diversity to installation design current figures?
Guidance Note 3.
IET On-Site Guide.
Approved Document P.
BS 7671 Wiring Regulations.
Which information must be supplied to the client on handover of an electrical installation in a domestic premises?
Materials used list.
Product user instructions.
Electrical personnel register.
Manufacturers' installation instructions.
A 6 mm² 70 °C PVC thermoplastic flat cable is to be installed in trunking within a factory. What is the maximum current-carrying capacity for this cable?
27 A
32 A
38 A
52 A
What is the maximum current-carrying capacity for a 2.5 mm² flat profile 70 °C thermoplastic cable installed in an ambient temperature of 35 °C installed as method C?
19.74 A
23.49 A
25.38 A
28.72 A
A 19 m circuit is to be installed to supply a load of 14 A, using 70 °C thermoplastic flat profile cable with protective conductor. What would the voltage drop for this circuit be if installed using 1.5 mm² live conductors?
6.9 V
7.7 V
11.5 V
11.7 V
