High Voltage Engineering MCQs Part 6
- The dielectric strength of air is approx:
- 10 kV/in
- 20 kV/in
- 200 kV/in
- 5000 kV/in
- Correct answer: b. 20 kV/in
- ____________ is/are expected to have treeing phenomenon:
- Capacitors
- Cables
- Dielectrics
- All of these
- Correct answer: 4. All of these
- Chubb–Fortescue method of measurement of a.c peak voltage values contains:
- A capacitor, two diodes, an ammeter, a Resistor and an overvoltage protector
- An inductor, two diodes, an ammeter, a Resistor and an overvoltage protector
- A capacitor, one diode, a voltmeter, a Resistor and an overvoltage protector
- An inductor, two diodes, a voltmeter, a Resistor and an overvoltage protector
- Correct answer: A capacitor, two diodes, an ammeter, a Resistor and an overvoltage protector
- Capacitor bushing use _______________ type of paper:
- Oil impregnated paper
- Resin bonded paper
- Resin impregnated paper
- All of these
- Correct answer: 4. All of these
- The radial stress of resin bonded paper capacitor busing is:
- 10 kV/cm
- 20 kV/cm
- 30 kV/cm
- 40 kV/cm
- Correct answer: 2. 20 kV/cm
- The long-term breakdown is also known as:
- Ageing breakdown
- Menacing breakdown
- Both of these
- None of these
- Correct answer: 1. Ageing breakdown
- __________________ considers the dependence of breakdown strength of liquid on length of gap:
- Suspended particle theory
- Bubble theory
- Stressed oil volume theory
- None of these
- Correct answer: 4. None of these
- Experiments suggest that breakdown strength of liquids depends primarily on:
- Length of gap
- Hydrostatic pressure
- Impurity particles
- Correct answer: 1. Length of gap
- Paschen law relates the breakdown voltage with pressure and electrode separation. For a particular gas the correct relationship as per Paschen’s law is:
- Breakdown voltage is directly proportional to pressure and inversely to separation
- Breakdown voltage is directly proportional to separation and inversely to pressure
- Breakdown voltage is inversely proportional to both
- Breakdown voltage is directly proportional to both
- Correct answer: 4. Breakdown voltage is directly proportional to both
- The cable routine test involves the application of ac voltage which is ________ times rated rated voltage and for approximately _______ minutes:
- 1/2, 2 minutes
- 1.5, 3 minutes
- 2.5, 10 minute
- 10, 50 minute
- Correct answer: 2.5, 10 minute
Continue reading:
- High Voltage Engineering MCQs Part 1
- High Voltage Engineering MCQs Part 2
- High Voltage Engineering MCQs Part 3
- High Voltage Engineering MCQs Part 4
- High Voltage Engineering MCQs Part 5
- High Voltage Engineering MCQs Part 7
- High Voltage Engineering MCQs Part 8
- High Voltage Engineering MCQs Part 9
- High Voltage Engineering MCQs Part 10