High Voltage Engineering Quiz | High Voltage Engineering Multiple Choice Questions with Answers

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Questions
61 Which theory explains the mechanism for breakdown under different conditions?
A Townsend theory
B Streamer theory
C Clump theory
D Only (a) and (b)

Answer: Only (a) and (b)
62 Inelastic collisions are those in which internal changes in energy take place within an atom or a molecule at the expenses of total kinetic energy of the colliding particle. Suitable example for inelastic collisions is/are
A Ionization
B Attachment
C Excitation
D All of these

Answer: All of these
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63 Druyesteynian distribution applies when the ion energy is much
A Greater than the thermal energy
B Lesser than the thermal energy
C Equal to the thermal energy
D None of these

Answer: Greater than the thermal energy
64 A gas in normal state is almost a perfect
A Conductor
B Insulator
C Semi-conductor
D Dielectric

Answer: Insulator
65 The Townsend mechanism explains the phenomenon of breakdown
A Only at low pressure
B Only at high pressure
C Only at very high pressure
D Only bat very low pressure

Answer: Only at low pressure
66 Liquids dielectrics are mainly used as
A Impregnants in high voltage cables
B In capacitors
C For filling up transformers
D All of these

Answer: All of these
67 For applications in power cables, the dielectrics most commonly used is
A Polyolefins
B Mineral oil
C Benzene
D Diphenyl

Answer: Polyolefins
68 High temperature hydrocarbons have
A Higher boiling point and low viscosity
B Lower boiling point and high viscosity
C Lower boiling point and low viscosity
D Higher boiling point and high viscosity

Answer: Higher boiling point and high viscosity
69 Compared to copper and iron losses, dielectric loss in transformer oil is
A Negligible
B Equal
C High
D Very high

Answer: Negligible

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