Three Phase Converters-3 MCQ

Test your knowledge with important Three Phase Converters-3 MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Three Phase Converters-3 MCQs at Bissoy

• In a 3-phase semi-converter, for firing angle less than 60° the freewheeling diode conducts for
  ক

  30°

  খ

  60°

  গ

  120°

  ঘ

  0
• A three-phase semi-converter circuit is given a supply of 400 V. It produces at the output terminals an average voltage of 381 V. Find the rectification efficiency of the converter circuit.
  ক

  99.65 %

  খ

  95.25 %

  গ

  91 %

  ঘ

  86.5 %
• A 3-phase full converter feeds power to an R load of 10 Ω. For a firing angle delay of 30° the load takes 5 kW. An inductor of large value is also connected to the load to make the current ripple free. Find the value of per phase input voltage.
  ক

  133 V

  খ

  230/√3 V

  গ

  191/√3 V

  ঘ

  298/√3 V
• What is the value of voltage at the output terminal when the freewheeling diode (FD) is conducting?
  ক

  Zero

  খ

  Maximum

  গ

  E

  ঘ

  It could be anything depending on α
• In a three-phase semi-converter, at a time one SCR and one diode conduct simultaneously. With SCR T1 conducting which diode(s) is most likely to conduct along with T1?
  ক

  D2 only

  খ

  D3 only

  গ

  D1 and D2

  ঘ

  D2 and D3
• In the below given circuit, __ and __ conduct along with T2.
  ক

  T1, T3

  খ

  D1, D2

  গ

  D1, D3

  ঘ

  T1, T2
• In the below given circuit, each SCR and diode conduct for
  ক

  60° and 120° respectively

  খ

  120° and 60° respectively

  গ

  120°

  ঘ

  60°
• Name the below given circuit.
  ক

  Full controlled, bridge converter

  খ

  Full controlled, semi converter

  গ

  Bridge type semi-converter

  ঘ

  Half controlled, full converter
• A three-phase full converter is driving a DC motor. If a continues current of Im amperes is flowing through the motor load, then find the rms value of supply current drawn by the converter to drive the motor.
  ক

  Im/√2

  খ

  Im2/3

  গ

  √2Im/√3

  ঘ

  √2Im/3
• A three-phase full converter supplied from a 230 V source is working as a line commutated inverter. The load consists of RLE type with R = 5 Ω, E = 200 V and L = 1 mH. A continues current of 10 A is flowing through the load, find the value of the firing angle delay.
  ক

  119°

  খ

  127°

  গ

  156°

  ঘ

  143°