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Quiz 1
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Q.1
Name the circuit shown in the figure below.
a) Single-phase circulating current type dual converter
b) Single-phase non-circulating current type dual converter
c) Three-phase circulating current type dual converter
d) None of the mentioned
Q.2
Dual converters handle ________ during no load.
a) very high temperature
b) no current
c) only circulating current
d) load current
Q.3
In a three phase dual converter, converter 1 is operating with α =and converter 2 is operating with α2 = 85°. Choose the correct statement.
a) Converter 1 is operating as a rectifier and converter 2 as an inverter
b) Both the converters are operating as a rectifier
c) Converter 1 is operating as a inverter and converter 2 as an rectifier
d) Both the converters are operating as an inverter
Q.4
The circuit shown below is that of a
a) single-phase circulating current type dual converter
b) three-phase non-circulating current type dual converter
c) three-phase circulating current type dual converter
d) none of the mentioned
Q.5
In circulating current type of dual converters, the nature of voltage across the reactor is
a) triangular
b) pulsating
c) constant
d) alternating
Q.6
When a line commutated converter operates in the inverter mode then
a) it draws real and reactive power from the supply
b) it delivers both real and reactive power to the supply
c) it delivers real power to the supply
d) it delivers reactive power to the supply
Q.7
The reactor is required in a circulating current type dual converter to
a) improve the power factor
b) smooth-en the waveform of circulating current
c) limit the circulating current
d) increase the circulating current
Q.8
In the below given figure the converter 1 (to the right side) has firing angle = αconverter 2 has firing angle = αFor the dual converter to operate in the second quadrant.
a) α1 > 90°
b) α2 > 90°
c) α1 < 90°
d) α2 < 90°
Q.9
If V1 and V2 are the converter output voltages then the reactor voltage is
a) V1 + V2
b) V1 – V2
c) V1 x V2
d) none of the mentioned
Q.10
In the below given figure, the converter 1 (to the right side) has firing angle = αconverter 2 has firing angle = αFor the dual converter to operate in the fourth quadrant.
a) α1 > 90°
b) α2 > 90°
c) α1 < 90°
d) α2 < 90°
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