Explore topic-wise MCQs in Electrical Engineering Questions.

This section includes 114 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.

101.

AC power in a load can be controlled by using
A. two SCR’s in parallel opposition
B. two SCR’s in series
C. three SCR’s in series
D. four SCR’s in series
Answer» B. two SCR’s in series
Discussion
102.

Choppers is a
A. AC - DC converters
B. AC - AC converters
C. DC - AC converters
D. DC - DC converters
Answer» E.
Discussion
103.

An SCR is made up of silicon because
A. silicon has large leakage current than germanium
B. silicon has small leakage current than germanium
C. silicon has small leakage voltage than germanium
D. silicon has large leakage voltage than germanium
Answer» C. silicon has small leakage voltage than germanium
Discussion
104.

Voltage commutation circuit can be converted into a current commutation by interchanging the positions of
A. Diode and capacitor
B. Capacitor and SCR
C. Inductor and capacitor
D. Capacitor and load
Answer» B. Capacitor and SCR
Discussion
105.

The switching function of semiconductor devices can be characterized with
A. Duty ratio only
B. Frequency only
C. Duty ratio and frequency
D. Duty ratio, frequency and time delay
Answer» E.
Discussion
106.

The main objective of static power converters is to
A. Obtain an dc output waveform from a dc power supply
B. Obtain an ac output waveform from a dc power supply
C. Obtain an dc output waveform from a dc power supply
D. Obtain an ac output waveform from a ac power supply
Answer» C. Obtain an dc output waveform from a dc power supply
Discussion
107.

For bidirectional operation of converters
A. A parallel combination of controllable switch and a diode is used
B. A parallel combination of controllable switch and capacitor is used
C. A series combination of controllable switch and a diode is used
D. A series combination of controllable switch and a capacitor is used
Answer» B. A parallel combination of controllable switch and capacitor is used
Discussion
108.

In a three phase converter, the number of notches per cycle is
A. One
B. Three
C. Six
D. Nine
Answer» D. Nine
Discussion
109.

The control method used for PWM dc - dc converter is
A. Voltage mode control
B. Current mode control
C. Hysteric control
D. All of these
Answer» E.
Discussion
110.

LISN is a device used to measure conducted emissions. LISN stands for
A. Line integrated stabilization network
B. Line impedance stabilization network
C. Line integrated stored network
D. Laser integrated stabilization networking
Answer» C. Line integrated stored network
Discussion
111.

The man made noise sources is / are
A. Motors
B. Switches, radio interferences
C. Computers, digital electronics
D. All of these
Answer» E.
Discussion
112.

Any electrical signal present in a circuit other than the desired signal is known as
A. Noise
B. Distortion
C. Interference
D. All of these
Answer» B. Distortion
Discussion
113.

Due to non sinusoidal waveform of the input current, the power factor of the rectifier is
A. Negatively affected by firing angle
B. Negatively affected by distortion of the input current
C. Positively affected by both firing angle and distortion of the input current
D. Both (a) and (b)
Answer» E.
Discussion
114.

The output power of the cascaded amplifier / attenuator system can be determined using
A. Actual gain of amplifier
B. Actual gain of amplifier and attenuator
C. Gain in dB of amplifier and attenuator
D. Actual gain of attenuator
Answer» C. Gain in dB of amplifier and attenuator
Discussion