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High Voltage, Fundamentals

CBT 56 questions

First 5 of 56 questions — with answers

The correct answer is marked. Unlock the rest to study the whole test, online or offline.

  1. Question 1

    A 440 Volt AC source supplies 2 loads in parallel. The left load has an impedance of 44 Ohms and the right of 11 Ohms. Which of the following is the current taken from the AC supply?
    • 50 Amps.
    • 8 Amps.
    • 44 Amps.
    • It cannot be calculated from the information given.

  2. Question 2

    A man accidently receives an electric shock resulting in a current of 2 mA flowing through his hands and chest. Which of the following best describes the likely effect on him?
    • He will feel nothing.
    • He will feel tingling or mild pain.
    • He will feel severe pain from burns.
    • He will be killed.

  3. Question 3

    An AC circuit delivers an active power of 30 kW when supplied at 400 Volts and 125 Amps. Which of the following is the reactive power?
    • 4 kVAr.
    • 30 kW.
    • 40 kVAr.
    • It cannot be calculated from the information given.

  4. Question 4

    An AC electrical circuit operates at 110 Volts. Which one of the following is the circuit's voltage rating according to this module?
    • Low Voltage.
    • Medium Voltage.
    • High Voltage.
    • Extra Low Voltage.

  5. Question 5

    An overcurrent relay is usually used to open a circuit breaker. Which one of the following is another function it may be used for?
    • To connect a second power supply.
    • To sound an alarm.
    • To trip the generator.
    • To start a generator.

Preview — 5 of 56 questions

You are seeing the first 5 questions with answers. Unlock the remaining 51 to study the whole test — online or offline.

About this CBT test

High Voltage, Fundamentals is a CBT test with 56 questions and verified answers. Common topics include: battery circuit, output volts, resistor ohms, high voltage, resistance upper, electrical conductor, volt source, current.

You can practise the free questions online — one at a time, with the correct answer — or unlock the whole test and download it to study offline, without internet.

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