WorksheetsMarch 2025 - 8202-520 Level 2 Theory Exam
Total questions: 60
Worksheet time: 30mins
Which set of regulations requires employers to carry out risk assessments?
The Workplace (Health, Safety and Welfare) Regulations.
The Management of Health and Safety at Work Regulations.
Provision and Use of Work Equipment Regulations.
Construction (Design and Management) Regulations.
Which type of site safety sign is triangular, has a yellow background, and contains a black border and symbol?
Warning.
Prohibition.
Information.
Mandatory.
What is the most important safety procedure to follow when handling adhesives?
Store the adhesive in a workshop.
Use the adhesive in a well-lit area.
Use the adhesive in a well-ventilated area.
Store the adhesive in a clearly labelled container.
Who is responsible for coordinating day-to-day operations on a construction site?
Quantity surveyor.
Site manager.
Building control inspector.
On-site clerk of works.
Which of the following is the most suitable method of measuring a current of approximately 100 A?
Using an ammeter in series with the load.
Using a current transformer around the cable.
Using a voltage transformer to reduce power.
Using a voltage meter and applying Ohm's law.
What is the size of angle X in Figure 1?
36.87°
41.41°
48.59°
53.13°
What is the SI unit of measurement for volume?
m³
mm²
kg/m²
m/s³
What is the current flow in a circuit if the total charge transferred in 1.5 minutes is 487.8 C?
0.54 A
5.42 A
54.2 A
542 A
What is the SI unit of measurement symbol for magnetic flux density?
F
H
T
N
What is the area of the room shown in Figure 2?
7 m²
23 m²
46 m²
120 m²
Which is the correct transposition of the formula shown to make 'a' the subject? c2=a2+b2
a=b2+c2
a = c2−b2
a=b+c
a=c−b
What is the potential difference in a circuit measured as?
Voltage.
Resistance.
Current.
Resistivity.
What will occur if the temperature of a conductor in a circuit increases?
The voltage will increase.
The current will decrease.
The resistance will increase.
The charge will decrease.
A 1.5 mm² copper cable is 100 m long with a resistivity of 1.72×10−8Ω⋅m at 20°C. What is its resistance?
0.115 Ω
1.15 Ω
11.5 Ω
115 Ω
What happens to the current in a circuit containing three resistors connected in series?
It will increase after passing through the first resistor.
It will split evenly through all the resistors.
It will be the same through all the resistors.
It will decrease after passing through the first resistor.
What is the total resistance of the circuit in Figure 3?
106.7 Ω
34.07 Ω
10.7 Ω
1.07 Ω
Which formula is used to calculate electromotive force (EMF) induced in a conductor moving through a magnetic field?
E = IR
E = V + I
E = V ÷ R
E = BLV
Which is the most suitable method for determining the direction of the field inside a motor?
Fleming's right-hand rule.
Fleming's left-hand rule.
Lenz's law.
Kirchhoff's law.
Which of the following indicates one complete cycle of a sine wave?
The frequency time.
Peak to peak value.
The periodic time.
The supply frequency.
Which point shows the approximate root mean square (RMS) in Figure 4?
Point A.
Point B.
Point C.
Point D.
What piece of equipment is shown in Figure 5?
Transformer.
Motor.
Alternator.
Generator.
What is side X referred to as in relation to the angle?
Hypotenuse.
Adjacent.
Opposite.
Tangent.
Which component is used to amplify a signal?
Diac.
Zener diode.
Photodiode.
Transistor.
Which type of instrument is only connected in parallel to a load on an energised circuit to obtain a reading?
Ammeter
Voltmeter
Wattmeter
Ohmmeter
What is the supply current for the circuit in Figure 7?
4.44 A
5.11 A
160 A
240 A
Which tool is used to measure the distance from the tool itself to a selected point or object?
Laser level
Water level
Range finder
Plumb line
Which conduit is not suitable for use in damp environments?
Galvanised conduit
Black PVC conduit
White PVC conduit
Black enamel conduit
Which general category of external influences relates to persons using an electrical installation?
Environment
Utilisation
Building
Supply
Which set of IP codes only refers to the protection against the ingress of solid objects?
IP4X and IPX5
IPX2 and IPX4
IP2X and IP4X
IPX2 and IP5X
Which type of set is shown in Figure 8?
Swan neck
Bubble
Back to back
Double
Which type of connection relies on a compression tool to make the connection?
Crimp
Clamp
Solder
Screw
Which accessory is suited to the load of 45 A?
Light switch
Cooker switch
Switched socket-outlet
Switched fused connection unit
Which system provides the highest level of mechanical protection?
PVC socket with PVC conduit
Metal clad socket with galvanised conduit
PVC socket with galvanised conduit
Metal clad socket with PVC conduit
What is the maximum recommended area that a 32 A ring-final circuit can serve?
100 m²
75 m²
50 m²
25 m²
Which is the most appropriate fixing to secure a mineral insulated cable installed on a masonry wall?
Flat cable clip.
Cable cleat.
Crampet.
P-clip.
Which type of support would prevent the premature collapse of a wiring system on a ceiling in the event of a fire?
Metal saddles.
PVC saddles.
Plastic cleats.
Nylon ties.
The Building Regulations require switches and socket-outlets to be installed so all persons can reach them. What is the correct height range above finished floor level for these accessories?
100 mm to 450 mm.
450 mm to 1200 mm.
600 mm to 1500 mm.
1200 mm to 1800 mm.
Which of the following is a transmission voltage?
400 kV
33 kV
11 kV
400 V
What type of earthing arrangement is shown in Figure 9?
TT system.
TN-S system.
IT system.
TN-C-S system.
A single-phase installation has a standard intake arrangement including a distributor's cut out, energy meter, and consumer unit (CU) including a main switch and RCBOs within. What protects the tails that link these items from both faults and overloads?
The fuse within the cut-out.
The neutral link within the cut-out.
The main switch within the CU.
The RCBOs within the CU.
Which method of generating electricity is most suitable to be installed on the roof of a dwelling and requires an inverter?
Solar photovoltaic (PV).
Coal power generation.
Micro combined heat and power (CHP).
Tidal power generation.
How many single-phase circuits can a four-way, three-phase distribution board supply?
4
8
12
16
Which protective device offers overload, fault, and additional protection?
Fuse
RCD
CB
RCBO
A socket-outlet circuit less than 63 A has a Uo of 230 V and forms part of a TN system. What is the maximum disconnection time?
5 seconds
1 second
0.4 seconds
0.2 seconds
Which of the following forms part of fault protection?
Earthing
Cable insulation
Placing out of reach
Barriers and enclosures
Which conductor is represented with the symbol R1 in an earth fault loop path?
Earthing conductor
Circuit protective conductor
Neutral conductor within the circuit
Line conductor within the final circuit
How is effective earthing and disconnection of a circuit achieved?
With low resistance and high fault current
With high resistance and low fault current
With high voltage and low resistance
With low voltage and high resistance
Which is potentially an extraneous conductive part?
PVC conduit
Steel trunking
Copper gas pipe
Steel wire armouring
A heating element has a resistance of 30 Ω. How much current will flow if 230 V is applied?
0.13 A
7.67 A
200 A
260 A
What does Regulation 14 of the Electricity at Work Regulations (EWR) state with regard to allowing work on or near live parts?
Work is allowed when it is unreasonable for the circuit to be dead
Work is allowed when it is cost-effective for the work to be carried out live
Work is allowed when the work needs to be done by a specific time
Work is allowed when the client requests an uninterrupted power supply
A site layout plan shows a wall that measures 0.25 m in length on the drawing. The drawing scale is 1:500. What length will the wall actually be?
0.20 m
5 m
25 m
125 m
A 32 A Type B circuit breaker requires a current of five times its nominal rating to disconnect in the required time, in order to provide fault protection. Which is the maximum value of earth fault loop impedance to allow this to happen, based on a voltage of 110 V?
0.69 Ω
1.37 Ω
2.34 Ω
7.19 Ω
Which nominal rating of circuit breaker is needed to protect a new 5 kW, 230 V electric heater circuit?
16 A
20 A
32 A
45 A
A heater has an element rated at 3.4 kW on a 230 V supply. What is the resistance of the element most likely to be?
14.78 Ω
15.56 Ω
782 Ω
3399 Ω
What is the total power dissipated by the circuit in Figure 10?
1.13 kW
2.66 kW
7.55 kW
150 kW
A switch room measuring 2 m × 2 m houses several distribution boards. A small fire breaks out within this room. Which fire extinguisher label colour is most appropriate in this situation?
Yellow
Blue
Red
Cream
A transformer having 550 turns on the primary winding is wound to provide a 230 V output from a 400 V input potential. What is the minimum number of secondary turns needed to achieve this?
956 turns
380 turns
317 turns
170 turns
During the design stage of a single-phase (230 V) rewire, a 6 kW domestic electric cooker is to be installed via a control unit without a socket-outlet. It is protected by a BS EN 60898 protective device. What should the nominal rating of the protective device be, taking diversity into account?
32 A
25 A
20 A
16 A
A circuit is wired using 1.5 mm² line and neutral conductors, each having a resistance of 0.12 Ω under load conditions. A load of 3000 W is connected to this 230 V circuit. What would be the voltage drop for this circuit under these conditions?
1.61 V
3.13 V
6.9 V
11.5 V
A circuit is to be designed for an x-ray machine in a hospital having high in-rush currents. The machine has a rating of 4.3 kW at 230 V. Which type and rating of circuit breaker is most suitable for protecting this circuit and equipment?
16 A Type B
20 A Type B
20 A Type D
32 A Type D
