high-voltage-engineering-mcqs-part-9

High Voltage Engineering MCQs Part 9

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Today Electrical Engineering shares most important High Voltage Engineering MCQs part 9. These MCQs are very important for your competitive exams and concepts testing. Let’s start learning.

  1. The term counterpoise in high voltage engineering is referred to:
    1. A large-sized sphere gap
    2. Galvanized wire which runs in parallel to the overhead line
    3. A surge arrester which is installed at distribution station
    4. None of these
      • Correct answer: 2. Galvanized wire which runs in parallel to the overhead line
  2. The standard shape of impulse wave as specified by the American standard is 1.5/40 μsec. The number 40 is:
    1. Wave front
    2. Wave tail
    3. Wave head
    4. Wave footing
      • Correct answer: 2. Wave tail
  3. Under standard atmospheric conditions the breakdown voltage for an air gap of 5 mm in a uniform field is:
    1. 22.52 kV
    2. 16.40 kV
    3. 765 kV
    4. 987 kV
      • Correct answer: 2. 16.40 kV
  4. ____________ is the input to impulse generator:
    1. DC Supply
    2. AC Supply
    3. Impulse
    4. Triangular a.c
      • Correct answer: 1. DC Supply
  5. The term wave front is associated with ____________:
    1. Sin
    2. Triangular
    3. Square
    4. Impulse
      • Correct answer: 4. Impulse wave
  6. The term wave front time represents the time taken to:
    1. Reach from zero to its maximum peak value
    2. Reach from 0.7 of peak to peak and again back to 0.7 after
    3. Reach from 0.8 of peak to 0.9 of peak
    4. None of these
      • Correct answer: 1. Reach from zero to its maximum peak value
  7. An overhead line has a surge impedance of 100 ohms. It is terminated by a resistor R. Value of R which should be used to avoid reflection is:
    1. 10 ohms
    2. 100 ohms
    3. 400 ohms
    4. 1036 ohms
      • Correct answer: 2. 100 ohms
  8. ____________ is widely employed for measuring HV voltages:
    1. Field gap
    2. Sphere gap
    3. Rod gap
    4. All of these
      • Correct answer: 2. Sphere gap
  9. The dielectric strength of Glass is:
    1. 1000 kV/in
    2. 1500 kV/in
    3. 2000-3000 kV/in
    4. 5000-10000 kV/in
    5. 20000 kV/in
      1. Correct answer: 3. 2000-3000 kV/in
  10. Temperature limit for Class E insulation is:
    1. 90°C
    2. 120°C
    3. 180°C
    4. 400°C
      • Correct answer: 2. 120°C

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