PHASE-CONTROLLED CONVERTERS -MCQ

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NAME *

Which converter type is most likely to be used in industrial applications requiring high power and low harmonic distortion? *

a) 2-Pulse Converter

b) 3-Pulse Converter

c) 6-Pulse Converter

In a 3-pulse converter, the output voltage is:
*

a) Twice the input voltage

b) Half the input voltage

c) A third of the input voltage

d) Depends on the firing angle

Which type of converter typically has the lowest efficiency due to higher ripple content?
*

a) 2-Pulse Converter

b) 3-Pulse Converter

c) 6-Pulse Converter

The source inductance in a power electronics circuit primarily affects the:
*

a) Voltage waveform

b) Current waveform

c) Power factor

d) Frequency response

In a three-phase converter, which firing scheme ensures equal sharing of load current among phases?
*

a) Sequential firing

b) Simultaneous firing

c) Interleaved firing

d) Random firing

Which firing scheme is typically used in single-phase full-wave rectifiers?
*

a) Natural commutation

b) Phase control

c) PWM control

d) Integral cycle control

Dual converters are often used in:
*

a) Heating applications

b) Lighting systems

c) DC motor drives

d) Communication systems

What is the primary advantage of using a dual converter?
*

a) Reduced power consumption

b) Ability to provide bidirectional power flow

c) Lower cost compared to single converters

d) Simpler control mechanism

What is the primary purpose of a light dimmer?
*

a) To turn lights on and off

b) To adjust the brightness of lights

c) To increase the power consumption of lights

d) To reduce the life of light bulbs

Which electronic component is commonly used in light dimmer circuits?
*

a) Diode

b) MOSFET

c) SCR (Silicon Controlled Rectifier)

d) IGBT

What is the main advantage of using a TRIAC in light dimmer circuits?
*

a) It can handle high currents

b) It can control power in both directions of the AC cycle

c) It reduces the cost of the circuit

d) It increases the efficiency of the circuit

What is the primary purpose of an excitation system in a generator?
*

a) To increase the speed of the generator

b) To control the voltage output of the generator

c) To reduce the noise of the generator

d) To monitor the temperature of the generator

Which type of power electronics component is commonly used in excitation systems?
*

a) SCR (Silicon Controlled Rectifier)

b) MOSFET

c) Diode

d) IGBT

What is the main function of an Automatic Voltage Regulator (AVR) in an excitation system?
*

a) To start the generator

b) To shut down the generator

c) To maintain a constant voltage output

d) To increase the power output

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