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°