level 3 electrical mock paper 2
Quiz
•
Science
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Professional Development
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Practice Problem
•
Easy
john shermer
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21 questions
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1.
OPEN ENDED QUESTION
3 mins • 1 pt
State three human resource factors that willrequire monitoring during an electrical installation project.(3 marks)
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2.
OPEN ENDED QUESTION
3 mins • 1 pt
Explain the operating principles of a wind turbine.(3 marks)
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3.
OPEN ENDED QUESTION
3 mins • 1 pt
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)
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4.
OPEN ENDED QUESTION
3 mins • 1 pt
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)
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5.
OPEN ENDED QUESTION
3 mins • 1 pt
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)
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6.
OPEN ENDED QUESTION
3 mins • 1 pt
Explain how the wound rotor on an AC induction motor achieves a high starting torque.(3 marks)
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7.
OPEN ENDED QUESTION
3 mins • 1 pt
State the three principles of space heating.(3 marks)
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