CS/B.Tech(PWE)/SEM-6/PWE-606 B/2012
2012
HIGH VOLTAGE ENGINEERING
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP – A
( Multiple Choice Type Questions )
1. Choose the correct alternatives for any ten of the following :
10 × 1 = 10
i) Ionization coefficients α, γ are functions of
a) Applied voltage
b) Pressure and temperature
c) Electric field
d) Ratio of electric field to pressure.
ii) Conduction and breakdown in commercial liquids is
affected by
a) Solid particles b) Vapour or air bubbles
c) Electrode material d) All of these.
iii) Paper insulation is mainly used in
a) Cables and capacitors b) Transformers
c) Rotating machines d) Circuit breakers.
iv) Tesla coil is used for
a) Generation of sinusoidal output voltages
b) Generation of very high voltages
c) Generation of rectangular voltages
d) Generation of high frequency a.c. voltages.
v) Electrostatic voltmeters can measure
a) Only DC voltages
b) Both DC & AC voltages up to high frequency
c) Impulse voltages
d) AC, DC and impulse voltages.
vi) Most important tests conducted on isolators and circuit
breakers are
a) Voltage withstand tests
b) Short circuit tests
c) High current tests
d Temperature rise tests.