Font size
Worksheetslevel 3 electrical mock paper 2
Total questions: 21
Worksheet time: 1hrs 3mins
State three human resource factors that willrequire monitoring during an electrical installation project.(3 marks)
Explain the operating principles of a wind turbine.(3 marks)
A 0.318 H inductor has a resistance of 20 Ω and is connected in series with a capacitor of 38.9 µF. They are connected to an AC 230 V supply at 50 Hz. Calculate the circuit’s power factor. (5 marks)
When a voltage of 110 V is applied to a circuit, a current of 20 A flows at a power factor of 0.95. Calculate the kVA.(2 marks)
An inductor has an inductive reactance of 4 kΩ when it is connected across a 24 V, 50 kHz AC supply. Calculate the supply current.(2 marks)
Explain how the wound rotor on an AC induction motor achieves a high starting torque.(3 marks)
State the three principles of space heating.(3 marks)
Describe the operating principle of a thermostat in an immersion heater.(3 marks)
Determine a suitable type and nominal rating of protective device for a single-phase circuit supplying a total loading of 4000 W discharge lighting. (4 marks)
State the two methods used to determine the suitability of a protective conductor CSA for thermal constraints during earth fault conditions as given in BS 7671. (2 marks
State three non-statutory publications associated with the Initial Verification of electrical installations. (3 marks)
Explain the purpose of a polarity test on a lighting circuit having LED luminaires. (3 marks)
Describe three behaviours that would help maintain good relationships with the client during the commissioning process. (3 marks)
State three health and safety considerations that would contribute to a risk assessment before carrying out fault diagnosis work. (3 marks)
State three common examples of activities that can result in a short circuit. (3 marks)
Explain the fundamental rule of basic protection. (3 marks)
Define an exposed-conductive-part.(3 marks)
State three methods that can be used when determining the characteristics of an incoming supply. (3 marks)
State three situations that require the completion of an Electrical Installation Certificate. (3 marks)
Answer question in image(15 marks)
Answer question in image (3 marks)
