MCQs High Voltage Engineering
1. Dielectric strength in case of mica can be expected to be more than
A. 500 kV/mm
B. 1500 kV/mm
C. 2500 kV/mm
D. 3500 kV/mm.
E. None of the above
2. Which of the following method or technique can be used for the measurement of high dc voltages ?
A. Peak voltmeter
B. Electrostatic voltmeter
C. Generating voltmeter
D. Any of the above
E. None of the above
3.All of the following dielectric materials are preferred for high frequency applications EXCEPT
A. Polyethylene
B. Butyl rubber
C. Teflon
D. Polystyrene.
E. None of the above
4.Surge diverters are
A. Non-linear resistors in series with spark gaps which act as fast switches
B. Arc quenching devices
C. Shunt reactors to limit the voltage rise due to Ferranti effect
D. Over-voltages of power frequency harmonics
E. All of the above
5. Polar dielectrics are normally used for
A. High frequencies
B. Microwaves
C. Dc and power frequencies
D. All of the above
E. None of the above
6. Impulse voltages are characterized by
A. Polarity
B. Peak value
C. Time of half the peak value
D. All of the above
E. None of the above
7. In design which of the following design is not included?
A. Features of shape
B. Mode or principle of construction
C. Composition of lines or colours
D. All of the above
E. None of the above
8.Which agreement is enforceable by law?
A. Valid agreement
B. Void agreement
C. Illegal agreement
D. Unenforceable agreement
E. None of the above
9. Which of the following is a polar dielectric ?
A. Teflon
B. Quartz
C. Nylon
D. Polyethylene
E. None of the above
10. The impurity in liquid dielectric which has significant effect in reducing the breakdown strength, is
A. Dust
B. Dissolved gases
C. Moisture
D. Ionic impurities
E. None of the above
11.Corona effect can be identified by
A. Bushy sparks
B. Faint violet glow
C. Red light
D. Arcing between conductors and earth
E. None of the above
12. A Tesla coil is a
A. Cascaded transformer
B. Coreless transformer
C. High frequency resonant transformer
D. Low impedance transformer